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Fire Safety Strategy for Developers

This report provides the fire and life safety strategy for a new B+G+4 residential building in Dubai. It includes classifications for occupancy and hazard levels. Means of egress requirements are outlined, including exit stairs, occupant load, number of exits, and dimensional criteria. Fire protection features are discussed such as construction type, compartmentation, and opening protectives. Requirements for fire department access and building services like sprinklers, standpipes, and fire pumps are also covered. Smoke management and emergency lighting systems are evaluated. Limitations of the report are noted.

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100% found this document useful (1 vote)
1K views42 pages

Fire Safety Strategy for Developers

This report provides the fire and life safety strategy for a new B+G+4 residential building in Dubai. It includes classifications for occupancy and hazard levels. Means of egress requirements are outlined, including exit stairs, occupant load, number of exits, and dimensional criteria. Fire protection features are discussed such as construction type, compartmentation, and opening protectives. Requirements for fire department access and building services like sprinklers, standpipes, and fire pumps are also covered. Smoke management and emergency lighting systems are evaluated. Limitations of the report are noted.

Uploaded by

Ragul0042
Copyright
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Sand Stone Properties, Dubai, United Arab Emirates

Final Fire and Life Safety Strategy Report


Al Wasl Al Jadeed Consultants
Sand Stone Properties, Dubai, United Arab Emirates
Final Fire and Life Safety Strategy Report

Sand Stone Properties, Dubai, United Arab


Emirates
Final Fire and Life Safety Strategy Report

Ref: AWA-SSP-FLS-00
Issue Revision Description Date Prepared Checked Approved
By By By
1 0 Final Fire and Life 28/01/2018 MA PP PvG
Safety Strategy
Report

AESG has prepared this report in accordance with the instructions of their Client for their sole
and specific use. Any other persons who use any information contained herein do so at their own
risk.

AESG
PO Box 2556, Dubai
Sand Stone Properties, Dubai, United Arab Emirates
Final Fire and Life Safety Strategy Report

Contents
1 Introduction .................................................................................................................................. 1
1.1 Project Description................................................................................................................... 1
1.2 Objectives .................................................................................................................................. 2
2 Design Requirements .................................................................................................................. 2
2.1 Authority Having Jurisdiction ................................................................................................. 2
2.2 Referenced Documents ........................................................................................................... 2
3 Classification of Occupancy ....................................................................................................... 3
3.1 Classification of Occupancy and Hazard of Contents ........................................................ 3
3.2 Hazard of Contents .................................................................................................................. 3
3.3 Building Characteristics ........................................................................................................... 3
4 Means of Egress ........................................................................................................................... 4
4.1 Exit Stairs ................................................................................................................................... 4
4.2 Occupant Load and Egress Capacity ..................................................................................... 4
4.3 Number of Exits ....................................................................................................................... 6
4.4 Dimensional Criteria for Staircase.......................................................................................... 9
4.4.1 Stairway Identification ....................................................................................................... 11
4.5 Dimensional Criteria for Corridors and Ramps ................................................................. 12
4.6 Exit Discharge ......................................................................................................................... 13
4.7 Arrangement of Exit and Travel Distances ........................................................................ 13
4.8 Impediments to Egress .......................................................................................................... 14
4.9 Means of Egress Components .............................................................................................. 15
4.9.1 Requirements: ..................................................................................................................... 15
4.9.2 Swing and force of doors: ................................................................................................. 16
4.9.3 Balconies and Railings ....................................................................................................... 16
4.9.4 Windows .............................................................................................................................. 17
4.9.5 Changes in Level in Means of Egress ............................................................................. 17
4.9.6 Floor Level .......................................................................................................................... 18
5 Features of Fire Protection....................................................................................................... 18
5.1 Type of Construction ............................................................................................................. 18
5.2 Exterior Walls for External Fire Spread .............................................................................. 19
5.3 Internal Fire Spread Control ................................................................................................. 20
5.4 Protection and Openings into Exit Enclosures ................................................................. 21
5.5 Opening Protective................................................................................................................. 21

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Final Fire and Life Safety Strategy Report

5.5.1 Fire Stopping....................................................................................................................... 21


5.5.2 Ducts and Air Transfer Openings ................................................................................... 22
6 Fire Department Access ........................................................................................................... 23
7 Building Service & Fire Protection Equipment .................................................................... 25
7.1 Fire Pumps and Fire Pump Room ....................................................................................... 25
7.2 Fire Water Reserve ................................................................................................................. 26
7.3 Automatic Sprinkler System .................................................................................................. 27
7.4 Wet Riser System .................................................................................................................... 28
7.5 Fire Department Connection (Breeching Inlets) ............................................................... 29
7.6 Portable Fire Extinguisher..................................................................................................... 29
7.7 Specific Fire Protection for Individual Auxiliary rooms ................................................... 30
7.8 Smoke Detection and Communication Systems ................................................................ 31
7.9 Emergency Lighting System .................................................................................................. 31
7.9.1 General................................................................................................................................. 31
7.9.2 Performance of system ...................................................................................................... 32
7.9.3 Emergency lighting for firefighting facilities .................................................................. 32
7.10 Marking of Means of egress .................................................................................................. 33
7.10.1 Exit and Directional Signs ............................................................................................ 33
7.10.2 ‘No Exit’ Sign ................................................................................................................. 33
7.11 Standby Power ........................................................................................................................ 34
7.12 Smoke Management System.................................................................................................. 34
7.12.1 Exit Stair Enclosures: .................................................................................................... 35
7.12.2 Enclosed Car Parking:................................................................................................... 35
7.12.3 Fire Pump Room, Emergency Command Centre and Generator Room ............. 35
7.12.4 Corridor Smoke Control System ................................................................................. 36
8 Information used and limitations of the report..................................................................... 37

AESG
PO Box 2556, Dubai
Sand Stone Properties, Dubai, United Arab Emirates
Final Fire and Life Safety Strategy Report

1 Introduction
1.1 Project Description
This final fire and life safety strategy report is for the development on Sand Stone Properties
B+G+4 Residential Building in Dubai, UAE.

Figure 1 Multi-Tenant Scheme in Jafza South Project Development Overall View

The building sits on basement level that is solely used for car parking. The ground is consisting of
residential apartment and few additional car parking. The level 01 is proposed to be used as
residential apartment use as well as amenities, such as gym, play area, swimming pool and pool
deck area. The remaining upper level 02 to 04 are typical and proposed to be used as residential
apartment. The total building height is 21.1 meter from ground level. This building is classified as
mid-rise.
The purpose of this report is to describe the fire and life safety design objectives for the building
mentioned above. The fire safety provisions have been based on the UAE Fire and Life Safety
Code of Practice (UFC). This report shall be reviewed in-conjunction with the drawings listed
below, which are issued for the DCD submission:

Drawing Title Drawing No Date Rev


Setting Out Plan 001 01-09-2018 00
Basement Level 101 01-09-2018 00
Ground Level 102 01-09-2018 00
First Level 103 01-09-2018 00

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Drawing Title Drawing No Date Rev


Second Level 104 01-09-2018 00
Third Level 105 01-09-2018 00
Fourth Level 106 01-09-2018 00
Roof Level 107 01-09-2018 00
Section 110 01-09-2018 00
Table 1 Referenced Documents

1.2 Objectives
The fire safety strategy for this building is based on the prescriptive-based methods of the UFC
which provide the minimum requirements for a Fire and Life Safety.
The fire and life safety aspects relevant to the final stage of the project are elaborated in this report.

2 Design Requirements
2.1 Authority Having Jurisdiction
The Authority Having Jurisdiction (AHJ) for this development will be Dubai Civil Defense
(DCD).

2.2 Referenced Documents


The below table gives an overview of the major codes to be followed.

Local and International Codes

Code Title Edition

UFC UAE Fire & Life Safety Code of Practice. UFC as further 2017
referred to in this document.
NFPA 101 Life Safety Code 2015
NFPA 1 Uniform Fire Code 2015
NFPA 5000 Building Construction and Safety Code 2015
Table 2 Referenced Documents

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Final Fire and Life Safety Strategy Report

3 Classification of Occupancy
3.1 Classification of Occupancy and Hazard of Contents
The buildings will be occupied primarily as residential occupancy. For the purpose of the UFC,
the buildings are considered to have multiple occupancies as there are more than two classes of
occupancy within the building and within a single floor level area, such as Level 01 – includes
residential and amenities.
As general guidance, where exit access from an occupancy traverses another occupancy, the
multiple occupancy will be treated as a mixed occupancy. If the building is classified as a mixed
occupancy, the building will comply with the most restrictive requirements of the occupancies
involved, unless separate safeguards are provided.
Below table summarizes the elements present in this project together with the occupancy and
hazard classification.

Location Classification Hazards


Apartments Residential Ordinary Hazard
Gym, children play area, Swimming Assembly Ordinary Hazard
Pool and Deck Area
Car Parking and Circulation Parking Ordinary Hazard
MEP Areas Storage Ordinary Hazard
Table 3 Classification of Occupancy and Hazard
3.2 Hazard of Contents
Considering the nature of the occupancies and the likelihood of contents that would burn with
moderate rapidity and with a considerable volume of smoke, the occupancies in this project are to
be classified as Ordinary Hazard in accordance with UFC.

3.3 Building Characteristics


Sand Stone Properties B+G+4 Residential Building
Number of Storeys B+G+4
Applicable Occupancy Parking, Storage, Residential and Assembly
Predominant Occupancy Residential
Hazard Classification Ordinary Hazard
Table 4 Building Characteristics

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Final Fire and Life Safety Strategy Report

4 Means of Egress
The following section provides details of the requirements and provisions for means of egress for
this building. Detailed definitions are summarized in the following table:

Term Definition
Means of egress A continuous and unobstructed way of travel from any point in a
building or structure to a public way consisting of three separate and
distinct parts; the exit access, the exit, and the exit discharge.
Means of escape A way out of a building or structure that does not conform to the
strict definition of means of egress, but does provide an alternate way
out.
Exit The portion of a means of egress that is separated from all other
spaces of a building or structure by construction or equipment as
required to provide a protected way of travel to the exit discharge.
Travel distances are measured to the entrance of the exit. Examples
of this would be an exit passageway, exit stair enclosure, and
horizontal exits.
Exit access That portion of a means of egress that leads to an exit.
Exit discharge The portion of a means of egress between the termination of an exit
and a public way.
Table 5 Means of Egress

4.1 Exit Stairs


The UFC states that 50% of total exit stairs will be required to discharge into a public way, into a
yard or court having direct access to a public way, or into an exit passageway. The exit passageway
will be required to be separated from the remainder of the building by a 2-hour fire resistance rated
assembly. Whilst, remaining exit stair can be discharged inside the building with direct view of final
exit.
The UFC requires exit stairs to have a minimum clear width of 1,200 mm in case of this project.

4.2 Occupant Load and Egress Capacity


Calculation of the ‘Occupant Load’ is necessary to ensure the provision of adequate exit capacity
for each floor of the proposed development.
An overview of occupant load calculations is given in the below table.

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Level Location Area (m2) Occupancy Load Occupancy Total


Factors Load Occupancy
(Person) Load per
(m2/person)
floor
Basement Car Parking 2847 27.9 102 102
Level
Ground External 543 9.3 58
Level Landscaping
Residential 1314 18.6 71 159
Area
Car Park 660 27.9 24
MEP 184 27.9 7
First Level Children 37 1.4 26
Play Area
Residential 1833 18.6 99
Area
Toilet & 80 9.3 9
Circulation
Gym 110 4.6 24 249
Swimming 133 4.6 29
Pool –
Water
Surface
Pool Deck 175 2.8 63
Second Residential 1750 18.6 94 94
Level Apartment
Third Level Residential 1750 18.6 94 94
Apartment
Fourth Residential 1400 18.6 75 75
Level Apartment
Roof Level MEP Area 1424 27.9 51 51
Table 6 Occupant Load Calculation
Chapter 3 of UFC states that the capacity of the exits for each floor is based upon egress capacity
factors of 5 mm per person for horizontal exits and ramps and 7.6 mm per person for exit stairs.
An overview of egress capacity calculations is given in the table below.

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Level Stair Maximum Egress Remarks


Width Egress Capacity Capacity
(mm) Per Stair Calculated
(7.6mm/person)
Basement Level 1200 158 102 Complies
1200 158
Total Exit Capacity 316
First Level 1200 158 249 Complies
1200 158
1200 158
Total Exit Capacity 474
Second Level 1200 158 94 Complies
1200 158
Total Exit Capacity 316
Third Level 1200 158 94 Complies
1200 158
Total Exit Capacity 316
Fourth Level 1200 158 75 Complies
1200 158
Total Exit Capacity 316
Roof Level 1200 158 51 Complies
1200 158
Total Exit Capacity 316
Table 7 Egress Capacity Calculation
It can be concluded that the designed exit numbers and exit width are sufficient to accommodate
total occupant load on the building.

4.3 Number of Exits


All areas of the building require a minimum of 2 exits where the exits are remote from each other.
Where the occupant’s numbers are more than 500 and less than 1000, there will be at least 3 exits
required.
The exits will be required to be remotely located from each other to minimize the potential that a
single fire incident could compromise multiple means of egress. The UFC requires exits in
sprinkler protected buildings to be separated by a distance at least equal to one-third of the length
of the maximum diagonal of the area served. If more than 2 exits are provided, at least 2 exits will
be required to meet this criterion.
Refer to figure 2 for clarification.

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Minimum 1/3 of diagonal

Figure 2 Exit Separation and Diagonal Measurement of Area Served

Assessment
It is noted that for the building is provided with sufficient exit remoteness distance of more than the
1/3rd of the overall diagonal distance complies with the UFC.
It is noted that for the building is provided with sufficient number of exits hence number of exit
complies with the UFC.
Figures below provides the identical arrangement of number of exit stairs on basement and upper
residential floors.
The provided exit stairs as typical for the building is indicated with the green hatch in the figures
hereafter.

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Figure 3 Exit Separation and Diagonal Measurement of First Floor

Figure 4 Exit Separation and Diagonal Measurement of Fourth Floor

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4.4 Dimensional Criteria for Staircase


Details of stair criteria under UFC.

Feature Dimensional Criteria

Minimum width (mm) 1200mm


Maximum height of risers (mm) 180
Minimum height of risers (mm) 100
Minimum tread depth (mm) 280
Minimum headroom (mm) 2030
Maximum height between landings (mm) 3660
Table 8 Dimensional Criteria for Stairs
Note: As there are no high occupant load areas observed in upper floors, the cumulative occupant
load does not exceed 2000 persons. As such case staircases can be assumed 1200mm in width.
Refer to the figure 5, 6, 7 and 8 for clarification.

Figure 5 Stair Elevation View

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Figure 6 Stair Plan View

Figure 7 Handrail Specification

Figure 8 Guard Specification


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The ascending and descending part of the exit stair are separated at the level of discharge.

Separation between above


and below discharge levels
(Can be a wall or fence)

Figure 9 Indicative exit stair discharge from above and below grade

4.4.1 Stairway Identification


All staircases will be provided with staircase identification. The following are the requirements of
stairway identification:
a) The stairs will be provided with special signage within the enclosure at each floor landing.
b) The signage will indicate the floor level.
c) The signage will indicate the terminus of the top and bottom of the stair enclosure.
d) The signage will indicate the identification of the stair enclosure.
e) The signage will indicate the floor level of, and the direction to, exit discharge.

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f) The signage will be located inside the enclosure approximately 1525 mm above the floor
landing in a position that is visible when the door is in the open or closed position.
g) The signage will be painted or stencilled on the wall or on a separate sign securely attached
to the wall.
h) The stairway identification letter will be located at the top of the sign in minimum 25 mm
high lettering.
i) The floor level number will be located in the middle of the sign in 125 mm high numbers.

Figure 10 Example of a Stairway Marking Sign

Figure 11 Stair Sign Placement

4.5 Dimensional Criteria for Corridors and Ramps


Table 9 on below indicates the criteria for corridors and ramps.
Feature Dimensional Criteria

Minimum width (mm) 1200


Maximum ramp slope 1 in 12
Maximum Rise of Single Ramp Run (mm) 760
Minimum Ramp Landing Length (mm) 1220
Table 9 Dimensional Criteria for Corridors and Ramps

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4.6 Exit Discharge


A minimum of 50% of the exit staircases will be required to discharge directly to outside the
building whilst the remaining exits may discharge internally through interior building areas such as
lobbies and corridors.
The interior exit discharge will be required to lead to a free and unobstructed way to the exterior
of the building, and such a way will be readily visible and identifiable from the point of discharge
from the exit.

Figure 12 Exit passageway used to connect exit stair with exterior of building
Assessment
From the first floor, the two of three exit stairs area discharging directly outsides. Therefore, more
than 50 percent exit stairs discharge directly to the outside – open to sky. The remaining one exit
stair discharging through interior of the buildings landscaping area and it is readily visible and
identifiable from the point of discharge from the exit which complies with the UFC.
Whilst, from for basement and upper floors 02 to 04, exit 01 is discharging directly outside and
open to sky. The exit stair 02 opens directly into a 2 hour fire rated exit passageway which
discharges directly outside. However, this exit passageway also having a opening from external
landscaping area and residential corridor. Therefore, considering design constraint we support this
exit stair to be considered as the discharging directly outside.

4.7 Arrangement of Exit and Travel Distances


Common Path, Dead End and Travel Distance to an exit
Common path is the portion of exit access that will be required to be traversed before two separate
and distinct paths of travel to two exits are available.

Figure 13 Common Path


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Dead end is the portion of corridor that when traversed leads to a dead end and that portion has
to be traversed back to get to the exit access and is measured along, on the floor or walking surface.

Figure 14 Dead End


Travel distances are measured from the most remote point of the floor to a nearest fire exit.
The travel distances, dead end and common path distances for each part of the building complies
with the recommendations of UFC as summarized below. For parts of the building classified as a
mixed occupancy, the most restrictive of the travel distances will apply of the occupancies
involved.

Occupancies Common Path Dead End Travel Distance


to Exit
Parking Structure (enclosed) 15 m 15 m 60 m
Residential 38 m (within the 15 m 61 m
residential unit)
Assembly 6.1 m (more than 50 6.1 m 76 m
people)
Table 10 Maximum Travel Distances as per UFC
Assessment
All the floor on the building has been verified and are found to be compliant with the travel
distance, common path and dead-end requirements.

4.8 Impediments to Egress


Access to an exit will not require intervening through kitchens, store rooms, rest rooms, closets,
bedrooms or similar spaces, or other rooms or spaces subject to locking. Exit access and exit doors
will be designed and arranged to be clearly recognizable.
Assessment
The provided layout complies with the requirement. All the exits are leading to the exits tair
/ exits via public corridor without passing through any other rooms / spaces.

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4.9 Means of Egress Components

4.9.1 Requirements:
The clear width of the doors in the means of egress will be at least 915mm wide. Where a pair of
door is provided one of the doors will have a clear width opening of no less than 810mm. The
method for measuring the clear width of doors is shown in Figure 15.
During its swing, any door leaf in the means of egress will leave not less than one-half of the
required width of an aisle, a corridor, a passageway, or a landing unobstructed. When fully open,
any door in a means of egress will not project more than 180mm into the required width of an
aisle, a corridor, a passageway, or a landing, unless the door leaf is equipped with an approved self-
closing device.
Exit access doors serving a room not exceeding 6.5 m2 in area and not required to be accessible
to persons with severe mobility impairments will not be less than 610 mm in door leaf width.

Measurement of door clear width Egress Capacity with Permitted Obstructions

Figure 15 Measurement of Door width

Figure 16 Door leaf swing into a corridor

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4.9.2 Swing and force of doors:


In accordance with Chapter 3 of the UFC, the following provisions are applicable –
a) Doors utilized as exits and in exit enclosures need swing in the direction of egress.
b) Doors that serve rooms with high hazard contents need swing in the direction of egress.
c) During their swing, the doors leaves must have not less than one-half of the required width
unobstructed and must not project more than 180mm into the required width.
d) Where doors are subject to two-way traffic or where their opening can interfere with
pedestrian traffic an approximately located vision panel will be installed to reduce the
chance of accidents
e) Doors required to be of the side hinged or pivoted swinging type will swing in the direction
of egress travel where serving a room or area with an occupant load in excess of 50 persons;
f) The forces required to fully open any door manually in a means of egress will not exceed
67N to release the latch, 133N to set the door in motion and 67N to open the door to the
minimum required width.

4.9.3 Balconies and Railings


The following requirement will apply to the proposed development.
a) Guards are required for any space, walking or standing which is elevated 760mm above
the finished grade level.
b) From the finished floor level, height of the balcony, terrace railings, elevated space railings,
will not be less than 1200mm.
c) Balusters openings, the separation distance between vertical posts or members, of balcony,
guardrail or handrail will not be more than 100mm.
d) Any opening formed by either vertical posts, curved frames or design features in the
balcony or railings will not be more than 100mm.
e) Horizontal elements, bars, climbable features will not be installed up to 760mm.
f) If the design demands any dap between finished floor surface and the bottom most
horizontal component of the railing, such gap will not be more than 100mm.

Figure 17 Requirements for Balcony and Railing Safety

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4.9.4 Windows
The following requirement will apply to the proposed development.
a) Openable windows will not be located at a height less than 865mm from the finished floor
surface level.
b) The window pane, if Openable, will not create a gap of more than 125mm from the wall,
when opened.
c) The windows assembly will have reinforced glass and will be able to withstand a single
concentrated load of 200 pounds, applied in any direction at any point.
d) There should not be any construction features at the bottom of the window which can be
translated into a ladder or climbing feature.

Figure 18 Windows

4.9.5 Changes in Level in Means of Egress


Changes in level in means of egress will be achieved by an approved means of egress where the
elevation difference exceeds 535mm.
Figure below illustrates an arrangement intended to meet the requirements for elevation
differences less than 535mm. In the Figure below, tread depth has been increased over the usual
minimum 280mm to a minimum of 330mm. The leading edge of each tread has been marked to
make its presence and location readily apparent.
Where a stair is used, the tread depth of such stair will not be less than 330mm.
Where a ramp is used, the presence and location of ramped portions of walkways will be readily
apparent.

Figure 19 Special features for stairs involving changes in elevation of 535mm or less

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Changes in level in means of egress in excess of 535mm will be achieved either by a ramp
complying with the requirements of Section 4.9 or by a stair complying with the requirements of
Section 4.8.

4.9.6 Floor Level


The elevation of the floor surfaces on both sides of a door opening will not vary more than 13mm.
The elevation of the floor surfaces will be maintained on both sides of the door opening for a
distance not less than the width of widest leaf.
Thresholds at door opening will not exceed 13mm in height.

5 Features of Fire Protection


5.1 Type of Construction
Based upon the classification of occupancy & hazard of contents, building height and the provision
of sprinkler protection, the Sandstone B+G+4 Residential Building in Jumeirah Village Circle are
required to comply with Type II (111) construction in accordance with UFC. The Type II (111)
construction requirements are described in Table 11. Type II (111) construction is referred as
Noncombustible Construction.
The table 12 shows the buildings characteristics based on its particular use, evacuation height and
resulting building classification type, maximum permitted area and maximum number of floors.

Use and Building Maximum Type of Maximum Maximum


Classification No of Building Building Permitted Permitted
Floors Height (m) Constructio Area (m²) No. Floors
n
Residential B+G+4 21.1 Type II (111) 6690 5
Group A
Table 11 Summary of building classification based on height, maximum permitted floor area and maximum
permitted number of floors
The design of any building and the type of materials used in its construction are important factors
in making the building resistant to a complete burn-out and in preventing the rapid spread of fire,
smoke and fumes, which may otherwise contribute to the loss of life and property.
For buildings 15m in height or above, non-combustible materials will be required to be used for
construction and the internal walls of staircase enclosures will be required to be reinforced concrete
with minimum of 2 hours fire resistance rating.
The requirements of fire rating to the structure are described in table 12.

Construction Element Type II (111)

Exterior Supporting more than one floor 1


bearing walls Supporting one floor only 1

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Construction Element Type II (111)

Supporting a roof only 1


Interior Bearing Walls Supporting more than one floor 1
Supporting one floor only 1
Supporting a roof only 1
Columns Supporting more than one floor 1
Supporting one floor only 1
Supporting a roof only 1
Beams, Girders, Trusses Supporting more than one floor 1
and Arches
Supporting one floor only 1
Supporting a roof only 1
Floor-Ceiling Assemblies 1
Roof-Ceiling Assemblies 1
Table 12 Required Fire Resistance of Structure.
The design team need to ensure that prescriptive requirements mentioned above will be
incorporated in the design.

5.2 Exterior Walls for External Fire Spread


Pursuant to Clause 2.7, Chapter 01 of UAE FLSC – 2017 Ed., to eliminate the fire rating for
exterior wall, the minimum horizontal separation of more 3m shall be provided.
As per Clause 3.3.335 of NFPA 5000, the horizontal distance can be defined as the width of the
permanent open space as measured horizontally between a building exterior wall and the
adjacent property line or the centreline of a facing street, alley, or public way, or to an imaginary
line drawn between exterior walls of adjacent buildings on the same lot.
Exterior walls will be required to be fire rated in case the distance to the property line is less than
3 meters.
Assessment
The current plot is having adjoining plot on two sides – on north side and east side. And no set back
distance is provided from plot limit. Therefore, external walls are provided with 2 hour fire rated
construction.

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5.3 Internal Fire Spread Control


The internal fire spread requirements are described in Table 13.
Component Wall and Partitions Fire Door/Shutter Fire Window Minimum side
(in hours) Assemblies light/ transom
Assemblies
(in hours) assemblies (in
(in hours)
hours)
Fire Walls 2 1½ Not 2
allowed
1 ¾ ¾ ¾
½ ⅓ ⅓ ⅓
Exit corridor 2 1½ 2 2
1 ½ ¾ ¾
Elevator hoistways 2 1½ Not 2
allowed
1 1 1 1
Elevator lobby 1 1 1 1
Vertical shafts 2 1½ Not 2
(Stairs, shafts, allowed
chutes)

1 1 1 1
Horizontal exit 2 1½ 2 2
Smoke barrier 1 ⅓ ¾ ¾
Table 13 Minimum fire resistance ratings for openings in fire resistant assemblies
The requirements of fire rating and fire protection to the auxiliary rooms are described in table 14.

Hazardous Area Description Separation

Generator rooms 2 hours


Fire pump rooms 2 hours
Substation rooms 2 hours
LV rooms 2 hours and provided with motorized louvres.
Garbage rooms 1 hour
GSM room 1 hour
Electrical rooms 2 hours
Between Corridors and Sleeping Room 1 hour
Residential Apartment Unit 1 hour

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Table 14 Hazardous room separation and protection.


The minimum Fire protection ratings for opening protection in fire resistance rated assemblies
will be in accordance with the requirements noted below

Location Fire Rating Requirements

Vertical shafts 2 hours with 90 minutes access openings

Elevators 2 hours with 90 minutes lift landing doors

1 hour fire and smoke rated lobby with 60


Elevator lobby minutes self-closing fire and smoke rated
door sets. (only for basement)

2 hours with 90 minutes self closing fire


Exit Passageways
rated door sets

Table 15 Fire Rating Requirements of specific areas / locations


Refer to Appendix – 01, for Fire Zoning Drawings, where the required fire rating for building
elements are indicated.

5.4 Protection and Openings into Exit Enclosures


Penetrations into and openings through each of the fire rated exit enclosures / stairways will
include each of the fire rated corridors that lead or discharge from each of the exit enclosures and
be limited to the following
a) Electrical conduits serving the stairways;
b) Required exit doors;
c) Ductwork and equipment necessary for independent stair pressurization;
d) Water or steam piping necessary for the heating or cooling of the exit enclosure;
e) Sprinkler piping;
f) Standpipes;
g) Penetrations for fire alarm circuits, where the circuits are installed in metal conduit.

5.5 Opening Protective

5.5.1 Fire Stopping


Spaces between sleeves and pipes will be sealed with fire rated sealant or similar materials that
accord with ASTM E-814 or ANSI/UL 1479 so that the fire resistance of the element is not
impaired.
Fire stopping will also be provided between the external façade and each of the intervening floors
of the building so as to restrict the interior vertical passage of flames and hot gases from one floor

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to another, at the location where the floor intersects the interior of the exterior curtain wall
assembly.
The following penetrations must be protected with a fire stop system or device –
a) Cable penetrations;
b) Cable trays;
c) Conduits;
d) Pipes;
e) Tubes;
f) Combustion Vents;
g) Exhaust vents;
h) Electrical;
i) Mechanical;
j) Plumbing;
k) Communication systems.
The fire stop system or device must be tested in accordance with ASTM E 814, Standard Test
Method for Fire Tests of Through Penetration Fire Stops or UL 1479 and achieve the following
fire ratings –
a) Where the fire barrier is required to have a 2 hour fire rating, the fire stop system must
also achieve a 2 hour fire rating.
b) Where the fire barrier is required to have a 1 hour fire rating, the fire stop system must
also achieve a 1 hour fire rating.

5.5.2 Ducts and Air Transfer Openings


The following provisions govern the materials and methods of construction used to protect ducts
and air transfer openings in fire walls, fire resistance rated horizontal assemblies and fire barrier
walls.
a) Fire dampers must be installed to protect ducts and air transfer openings that penetrate
fire barriers and fire walls;
b) Fire dampers must be designed and tested in accordance with the requirements of UL 555,
Standard for Fire Dampers and will have a 1 ½ hour minimum damper rating.
c) Location of Fire Dampers
Fire Dampers are required in the following locations –
a) Ducts and air transfer openings penetrating walls or partitions having a fire resistance
rating of 2 or more hours;
b) Ducts and air transfer openings penetrating shaft walls having a fire resistance rating of 1
or more hours;
c) Ducts and air transfer openings penetrating floors that are required to have protected
openings where the duct also is not protected by a shaft enclosure;

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d) Air transfer openings that occur in walls or partitions that are required to have a fire
resistive rating of 30 minutes or more.
Fire Dampers are NOT required in the following locations –
a) In floors that do not require protected floor openings;
b) In a duct system serving only one floor and used only for exhaust of air to the outside and
not penetrating a wall or partition having a required fire resistance rating of 2 hours or
more or passing entirely through the system and contained within its own dedicated shaft;
c) Where branch ducts connect to enclosed exhaust risers in which the airflow is upward and
steel subducts at least 560mm in length are carried up inside the riser at each inlet.
5.5.2.1 Access and Maintenance
Fire dampers must be provided with an approved means of access, as follows –
a) The means of access will be large enough to allow inspection and maintenance of the
damper and its operating parts;
b) The access must not affect the integrity of fire resistance rated assemblies;
c) The access openings must not reduce the fire resistance rating of the assembly;
d) Access points must be permanently identified;
e) Access doors in ducts must be identified with a label having letters not less than 13mm in
height;
f) The label must read as one of the following –
o FIRE / SMOKE DAMPER
o SMOKE DAMPER
o FIRE DAMPER
g) Access doors in ducts will be tight fitting and suitable for the required duct construction.

6 Fire Department Access


The provision of ‘Fire Department Access’ around the perimeter of the development and access
to each of the buildings is a key fire safety design feature.
The Fire department access requirements are summarized in table 16.

Fire Department Access

A fire department access road will extend to within 15 meter of at least one exterior doorway
of the buildings that may be opened from the outside and provide access to the interior of the
building
The Fire department access roads have an unobstructed width of not less than 6.0 meter
The Fire department access roads have an unobstructed vertical clearance of not less than 4.5
meter

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Fire Department Access

The Fire department access roads will be capable of supporting the imposed loads of 81,000
Kgs and will be an all-weather driving surface
The maximum road grade of the Civil Defence vehicle access will not exceed 10%
Breeching inlets should be visible from fire engine access road to avoid delay in locating them
upon arrival of the fire crew. For better control and limit to only one hose length being used,
the breeching inlets will not be sited more than 18m away from the fire engine access road.
A suitable access pathway shall also be provided to enable fire-fighters to inspect all elevations
of a building during or after a fire. A suitable pathway could be a paved or gravel path. Any
such pathway should be a minimum of 1 m wide and Plants, Bushes, Walls or other features
should not impede such pathway.
Dead-end fire engine access road will not exceed 45m in length or if exceeding 45 meter will
be provided with turning facilities. The following below will be considered in designing the
turning facilities for fire engine.
The minimum inner radius for turning facilities will be no less than 7000mm.
The minimum outer radius for turning facilities will be no less than 11000m.
The minimum clearance radius for turning facilities will be no less than 12000mm.
In accordance with Section 2.8.7, Chapter 2 of UAE Fire and Life Safety Code 2017; it is
noted that the building is mid-rise building with maximum GFA to be less than 4000 sq.m.
Hence, the extent of fire vehicle access way will be no less than 1/6th of the building
perimeter.
The fire engine should be located at least 2m from the building, but not more than 10m away
from the external wall or façade of the building.
Table 16 Fire Department Access
Assessment
It is noted that fire department access for the building in the proposed development are more than
1/6th of the building perimeter. Hence fire department access complies with the UFC.
The tables below provide the summary for each building. Kindly note that the below tables shall be
reviewed in-conjunction with the overall master plan figure below.

Table 17 Fire Department Access Assessment


Fire Department Access Assessment – Sand Stone B+G+4 Residential Building

Building Building Largest Perimeter Required Applied/ Complies


Use Height Gross of Length of Available Fire (Yes/No)
(m) Floor Building Fire Vehicle Engine Access
Area (m) Access (m) Way (m)
(Sq.m)
Residential 21.1 2368 380 63 64 Yes
Group A

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Figure 20 Fire Department Access for Sand Stone B+G+4 Residential Building

7 Building Service & Fire Protection Equipment


7.1 Fire Pumps and Fire Pump Room
Fire pump set is located at the lowest level and accessible directly from the outside and protected
with an automatic sprinkler system.
A common fire pump set is acceptable to feed both sprinkler and wet riser system. In such a case,
the fire pump set capacity will be not less than the highest fire demand calculated.
Below are the requirements that pertain to the location and arrangements of fire pumps.
The fire pump set will consist of each of the following –
a) Main Electric Pump;
b) Standby Diesel driven pump; and
c) Electric Jockey pump
Two electric pumps can be used, one as duty and another as standby. The power supply for the 2
electric pumps will be reliable and be independent of each other.

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Fire pumps at higher than the lowest level of the building with water supply feeding downwards
is not permitted.
The fire pump capacity is 750 gpm for a 60 minutes duration.

Figure 21 Fire Pumps and Fire Pump Room

7.2 Fire Water Reserve


The fire water tanks will comply with the UFC requirements and regulatory requirements noted
by Dubai Civil Defense as shown below.
a) The fire water tanks will be provided with filling connection directly from DEWA with a
float operated valve for automatic refilling.
b) The fire water tanks will be provided with drain arrangement, overflow connection, access
manhole, ladders, level indicators, low level switch. Etc.
c) Fire water tanks will be constructed and located such that the fire pump sets get flooded
water supply in case of fire pumps are horizontal centrifugal type.
d) Tank materials are limited to Concrete, Steel or Fiberglas reinforced plastics and will with
stand unit weight of water of 1000kg per cubic meter.
Fire water tank will be required to be located next to fire pump room.
The water tank at the lowest level of the building will have a capacity of 60 minutes of operation,
complete with low water level detection, dedicated direct breeching inlet and instantaneous refilling
arrangement.
Water tank cleaning or maintenance process will be allowed one compartment at a time such that
the fire water supply from one compartment will always be available for the fire protection systems.

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It shall be ensured that the fire water tanks duration 60 minutes and the effective firewater tank
storage capacity of 251 cub meter will be required to be provided. The Fire water tank will be
required to have 2 internal equal compartments.
Proposed location of fire pump and fire water tank is shown in the exhibit below. The fire pump
room is provided with dedicated exit access from outside.

Figure 22 Proposed location of fire pump at basement level

7.3 Automatic Sprinkler System


An automatic fire sprinkler system will be required to be provided throughout the building in
accordance with Chapter 9 of the UFC.

Area Hazard Group Sprinkler Area of


Zone Operation
Limitation (m2)
Car Parking Areas Ordinary Hazard 1 4831m2 139
Fire pump rooms Extra Hazard Group 2 3716 m2 232
Residential Rooms and Light Hazard 4831m2 139
areas
Table 18 Sprinkler Design Criteria

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A sprinkler control valve and a water flow device will be provided for each floor.
The maximum area of any single sprinkler zone in a floor will be not more than the floor area
specified in Chapter 9 of UFC.
The minimum operating pressure of any sprinkler for determining the water supply requirements
will be not less than 7 psi in the light hazard occupancies and 14.5 psi in the ordinary hazard
occupancies.
Pressure reducing valves will be installed prior to zone control valves at lower zones where the
pressure exceeds 12 bar.

7.4 Wet Riser System


In accordance with Chapter 9 of the UFC, the proposed development will be required to be
provided through out with a Wet Riser system.
The Wet riser system will be required to be designed with Class III system consisting of 25mm
diameter fire hose rack & 65mm diameter landing valve with hoses and nozzle in case of light
hazard area. Other than the light hazard area 40mm diameter hose rack will be required to be
provided.
The fire hose station or cabinet will be required to be located within 6m of the exit door enclosure
and additional fire hose station along the exit access corridor will be installed such that all portions
of each floor are within 30m from the hose station.
Fire hose cabinets will be located next to the exit doors at ground floor and exit stair door at typical
floors, in the exit corridor in each floor of the building.
In the common corridor or common areas within a protected shaft where additional hose stations
are required to meet the 30m coverage requirements noted below.
Landing valves will be installed at a height of not less than 900mm and not more than 1200mm
from the finished floor level.

Figure 23 Fire hose cabinet Class III system

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Assessment
The above-mentioned wet riser system is provided in the MEP drawings. It complies with the
UFC.

7.5 Fire Department Connection (Breeching Inlets)


Pursuant to Section 2.10.2, Chapter 2 of UFC, wet riser system is terminated to 4-way breeching
inlet connection having 150mm diameter flanged outlet with 4 numbers of 65mm diameter
instantaneous male coupling inlets located at ground level in an easily accessible, visible location
within 18m from the civil defense vehicle access road.
The building is provided with minimum of two breeching inlets per wet riser at remote locations.
a) Breeching inlet (fire department connections) will be located on the street side of the
buildings, near the building entrance and on the fire access way. Breeching inlet will be
within 18m from the fire vehicle parking slot.
b) These breeching inlet connections will be located and arranged such that hose lines can be
readily and conveniently attached to the inlets without interference from any nearby
objects, including buildings, fences, posts, trees or other fire department connections.
c) Breeching inlets will be equipped with caps to protect the system from the entry of debris.
d) Fire department connections will be located not less than 457mm nor more than 1219mm
above the finished ground level.
e) Each breeching inlet connection to sprinkler/wet riser/dry riser systems will be clearly
designated by a sign as follows:
• The sign will have raised or engraved letters at least 25.4mm in height on a plate
or fitting.
• The sign will be both in English and Arabic indicating the service for which the
connection is intended and will read, for example, as follows:

WATER TANK/SPRINKLER/WET RISER/DRYRISER

7.6 Portable Fire Extinguisher


Portable fire extinguishers will be required to be provided throughout the building in accordance
with the UFC Chapter 4.
The services design team will ensure that when selecting the appropriate fire extinguishers, the
classification of fires is in accordance with the following requirements –
a) Class A fires – Fires in ordinary combustible materials, such as wood, cloth, paper, rubber
and plastics (water type, multipurpose dry powder, carbon dioxide or foam).
b) Class B fires – Fires in flammable liquids, combustible liquids, petroleum greases, tars, oils,
oil based paints, solvents, lacquers, alcohols and flammable gases (dry powder, carbon
dioxide or foam).
c) Class C fires – Fires that involve energized electrical equipment (carbon dioxide or dry
powder).

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d) Class D fires – Fires in cooking appliances that involve combustible cooking media such
as vegetable or animal oils and fats (special purpose dry powder).
Installation of Portable Fire Extinguishers will be as follows
a) Fire extinguishers must be conspicuously located along normal paths of travel, including
exits from areas.
b) Fire extinguishers must not be obstructed or obscured from view.
c) Fire extinguishers having a gross weight not more than 18.14kg must be installed no higher
than 1.53m above the floor (measured to the top of the extinguisher).
d) Fire extinguishers having a gross weight of more than 18.14kg must be installed no higher
than 1.07m above the floor (measured to the top of the extinguisher).

Maximum 1.5meter

At least 30cm

Figure 24 Installation of Portable Fire Extinguisher


Label Visibility & Cabinets
a) Extinguishers operating instructions will be located on the front of the extinguisher and
will be clearly visible.
b) Cabinets housing extinguishers must not be locked.
c) The location of extinguishers within cabinets must be marked conspicuously in both
English and Arabic.

7.7 Specific Fire Protection for Individual Auxiliary rooms


UFC require all non-industrial non-storage areas of the building to be protected with the following
specific fire protection systems. The requirements of fire protection to the auxiliary rooms are
described in table 19.

Auxiliary Room Type of Fire Protection System


Electrical Rooms > 5 sq. meter in area Clean Agent System
Electrical Rooms < 5 sq. meter in area Electrical rooms, which are less than 5 sq. meter
in area and are located on typical floors will not

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Auxiliary Room Type of Fire Protection System


be required to be protected. Please note that in
such typical floor electrical rooms to be limited to
distribution boards and junction boxes.
Garbage Rooms Sprinkler System
Generator Rooms Foam System
LV Rooms Clean Agent System
Lift Machine Rooms Double interlock pre-action sprinkler system
Main Telephone Rooms and Server Clean Agent System
Rooms > 5 sq. meter in area
Main Telephone Rooms and Server Telephone rooms which are less than 5 sq. meter
Rooms < 5 sq. meter in area in area, which are not critical for service and are
located on typical floors will not be required to
be protected.
Fire Pump Rooms Sprinkler System
Table 19 Specific Fire Protection for Individual Auxiliary rooms

7.8 Smoke Detection and Communication Systems


Smoke detection and alarm system will be required to be provided throughout the building in
accordance with Chapter 8 of the UFC.
The standard of wiring and equipment for the fire detection and alarm system is required to comply
with NFPA 72 and NFPA 70.
The fire alarm system sound levels will be 15 dB above ambient sound levels which will be
influenced by the noise generated by the smoke fan operation in areas other than sleeping areas
like bed rooms.
Where audible appliances are installed to provide signals for sleeping areas, they will have a sound
level of at least 75 dBA, measured at the pillow level in the area required to be served by the system
using the A-weighted scale (dBA).
Manual call points will be installed within 1.5m from the required exit doors and will be installed
at a height between 1.1 to 1.4m above the floor level.

7.9 Emergency Lighting System


Monitored type self-contained emergency lighting system will be required to be with dedicated
control and monitoring equipment along with computer interfacing.
This above-mentioned emergency lighting system will be required to be provided in accordance
with the UFC Chapter 6.

7.9.1 General
Emergency lighting will be required to fulfil the following functions.

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a) To indicate clearly the escape paths.


b) To provide illumination along such paths of travel that allows safe movement towards and
through the exits provided.
c) To ensure that the fire alarm call points (manual call points) and firefighting equipment
provided along paths of travel may be readily located.
d) To permit operations concerned with safety measures.
e) Emergency lighting will be provided to all corridors, egress paths, lobbies and including.
f) Exit stairways.
g) Over areas where there is not explicit path leading to a corridor, lobby and / or exit.
h) In all rooms exceeding 60m2 in area.
i) Generator room;
j) Fire pump room.

7.9.2 Performance of system


Where maintenance of illumination depends on changing from one energy source to another, a
delay of not more than 10 seconds will be permitted.
a) Emergency illumination will be provided for not less than 3 hours in event of failure of
normal lighting;
b) It will also be arranged to provide initial illumination that is not less than an average of 1
ft-candle (10.8 lux) and at any point not less than 0.1 ft-candle (1.1 lux), measured along
the path of egress at floor level.;
c) Illumination levels will also be permitted to decline to not less than an average of 0.6 ft-
candle (6.5 lux) and, at any point, not less than 0.06 ft-candle (0.65 lux) at the end of the 1
hours; and
d) Have a maximum-to-minimum illumination uniformity ratio of 40:1;
e) Emergency power systems for emergency lighting will be at least Type10, Class 1.5, Level
1 in accordance with NFPA110 – 2010, Standard for Emergency and Standby Power
Systems.

7.9.3 Emergency lighting for firefighting facilities


Fire alarm panels, fire alarm call points and firefighting equipment will be adequately illuminated
at all times so that they can be readily located.
The delay between the failure of the electrical supply to normal lighting and the energization of
the emergency lighting for firefighting facilities will not exceed 10 seconds.
However, the delay between the failure of electrical supply to normal lighting and the energization
of the emergency lighting for occupied areas will not exceed 1 second.

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7.10 Marking of Means of egress

7.10.1 Exit and Directional Signs


Exit signs and directional exit signs will be provided to all exits and in paths of travel to exits in
accordance with Chapter 5 of UFC.
Sign placement will be as follows.
a) Signs will be placed such that no point is an exit access is more than 30m from nearest
sign.
b) Signs will be located no more than 1000mm above the edge of egress doors.

Figure 25 Marking of Mean of egress


c) Directional signs with an indicator showing the direction of travel will be placed in every
location where the direction of travel to reach the nearest exit is not apparent.
d) Any door, passages, or stairway that is neither an exit nor a way to an exit that it is likely
to be mistaken for an exit will have a NO EXIT sign or a room name sign, i.e. Mechanical / Elec.
Room, etc.
e) Visible signs will mark exit access areas such as: stairs, aisles, corridors, ramps, escalators,
and passageways leading to an exit, with the exception of main exterior doors that are clearly
identifiable as exits.

7.10.2 ‘No Exit’ Sign


In accordance with Table 5.1, Chapter 5 of UFC any door, passage or stairway that is neither an
exit nor a way of exit access and that is located or arranged that it is likely to be mistaken for an
exit will be identified by a sign that reads “NO EXIT”.

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The sign will have the word “NO” in letters 51mm high and the word “EXIT” in letters 25mm
high with the word “EXIT” below the work “NO”.

Figure 26 No Exit sign


7.11 Standby Power
A Standby power system will be required to be provided in accordance with UFC with the capacity
and rating that is sufficient to supply power to the following equipment –
a) Electric pump if diesel pump not installed, Jockey pumps
b) Mechanical equipment for smoke proof enclosures.
c) Detection, alarm and communication systems
d) Emergency Lighting.
If the fire pump is connected to the Standby power supply, the Generator will be required to
comply Type 10, Class X, Level 1.
Please note that standby power is no longer required for the main electric driven fire pump as long
as the standby fire pump is a diesel driven fire pump.

7.12 Smoke Management System


The strategy for the smoke control system within the proposed development will be in accordance
with the UFC as noted below
Smoke control system using a dedicated ducting will be required to be provided in the parking
basement level. in a single smoke zone of not more than 2000 m2. The Enclosed car parking will
be provided with a mechanical smoke purging system using a dedicated ducted system achieving
10 Air Change per hour.
Note that the smoke zone can be a virtual smoke zone meaning that the provision of smoke
curtains or drop beams should not be required.
Mechanical ventilation for smoke exhaust system will be required to be provided in the fire pump
room, Emergency command center and generator room.
Lift pressurization system is provided in case of this building.
Staircase pressurization system is provided in the exit staircases.
Mechanical smoke control system is provided in the corridors and open circulation areas.

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7.12.1 Exit Stair Enclosures:


a) When in operation, the pressurization system will maintain airflow of sufficient velocity
through open doors to prevent smoke from entering into the pressurized area.
b) To keep pressurized space clear of smoke contamination air velocity through the open
door between the pressurized and unpressurized spaces on the floor of fire origin will not be less
than 1.0m/s.
c) The pressure differential across a barrier must not result in door opening forces that exceed
the maximum force of 133N.
d) Supply air for pressurization will be drawn directly from the external and its intake will be
not less than 5m from any exhaust discharge openings.
e) Manual activation and deactivation control of the stairwell pressurization systems will be
provided at the emergency command centre.
f) Stair case pressurization can be either top fed or bottom fed.

7.12.2 Enclosed Car Parking:


Smoke control system using a dedicated ducting will be required to be provided in the parking
basement level. in a single smoke zone of not more than 2000 m2. The proposed basement
enclosed car parking is having area of 2847 m2 and therefore, basement will be provided with a
mechanical smoke purging system using a dedicated ducted system achieving 10 Air Change per
hour.
Make-up air or replacement air shall not be required for proposed single basement carparks, as it
has an area of less than 3600 m2.

The drive ways (Entry and Exit) shall be permanently open and provide for the required make-
up air.

It shall be ensured that a jet fan system shall not be permitted in enclosed parking.

7.12.3 Fire Pump Room, Emergency Command Centre and Generator Room
The mechanical ventilation system will be an independent system of exhaust mode only exclusive
to the particular area.
Exhaust will not be into underground, basement or car park spaces.
Exhaust will be directly to the exterior, through dedicated ducts or shafts and will not be less than
5m from any air intake openings.
Makeup air for the system will be drawn directly from the external, with the intake point not less
than 5m from any exhaust discharge openings.
Makeup air will not be drawn from adjoining areas, underground, basement, plant rooms or car
park spaces.
This mechanical ventilation system will be automatically activated by a sprinkler flow switch from
the particular area and/or the building fire alarm system, from detectors of the particular area.
In addition, a remote manual start-stop switch will be made available to Civil Defence on the
smoke control panel (SCP) at the emergency command center.
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7.12.4 Corridor Smoke Control System


Corridor and open circulation areas is provided with mechanical smoke purge with a mechanical
system.
a) Corridor smoke purge mechanical system will be capable of achieving a minimum of 6 air
changes per hour.
b) Mechanical air supply inlets will achieve a minimum 85% air flow rate of the extract;
c) Air velocity through air supply inlets will be lower than 5m/s;
d) These various air inlets and outlets will be equipped with closed dampers in their waiting
(non-fire mode) position;
e) Makeup air will be provided by fans or openings to the outside or leakage paths, the
combination thereof;
f) The supply points for the makeup air will be located beneath the smoke layer interface;
g) Mechanical make up air will be less than the mass flow rate of the mechanical smoke
exhaust;
h) The makeup air will not cause door opening force to exceed allowable limits;
i) It is preferable for air supply inlets to have their lower part at least 300mm above the flow
and their highest part at most 1m above the floor. Supply inlet will have removable grille
for easy actuator access from inlet face;
j) Air supply inlets will preferably be in close proximity to fire stop doors and access doors
to staircases;
k) If the air supply inlet is carried out through opening flaps, their free surface will be in the
lower half of the premise.

Figure 26 Typical corridor and open circulation area mechanical smoke purge system
l) Air supply inlets and smoke extraction outlets will be distributed alternately, such that the
horizontal distance between the supply and extraction, measured along the axis of
circulation, should not exceed 15m.

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m) Smoke extraction outlets will have their lower part at least 1.83m above the floor and
located entirely within the higher third part of the circulation. Extraction outlets should
have removable grills for easy actuator access from outer face.
n) Where a smoke extraction outlet is served by two air supply inlets, the distance between
inlets and outlets must be equivalent.
o) Extract outlets will not be located within 6m of any exit stair or exits.

Figure 27 Location of supply air inlets and smoke extract outlets.


p) Smoke extract fans will be approved for effective operation at 400-degree Celsius for 2
hours.
q) Corridor and open circulation area smoke management system, control panel, fans and
related equipment will be provided with emergency power;
r) Backup / Standby fans will not be required for corridor smoke management system.

8 Information used and limitations of the report


This report is based on design information received from Al Wasl Consultants.
This report primarily considers the recommendations of the UAE Fire and Life Safety Code of
Practice and, as such, deals with life safety.
The information in this report is no guarantee that a fire will not occur in the building.
The information contained within this report is for use solely in relation to the Sand Stone
Properties B+G+4 Residential Building and should not be used in relation to any other project.
The report is not for the use of, or reliance on, by third parties.

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Appendix 1:
Fire and Life Safety Drawings issued for DCD submission

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