Occupational Safety and Health Division

18 Havelock Road
Singapore 059764
Tel : 64385122
www.mom.gov.sg
mom_oshd@mom.gov.sg

NOTIFICATION FOR USE OF TOWER CRANE IN WORKPLACE

This form may take you 20 minutes to complete.

You will need the following information to fill in the form:

• Particulars of occupier of workplace

• Particulars of tower crane used
• Particulars of Approved Crane Contractor

1
 NOTIFICATION FORM FOR USE OF TOWER CRANE IN WORKPLACE

To: Ministry of Manpower

Occupational Safety and Health Division
Havelock Road, #03-02
Singapore 059764

Notes to all applicants:

1. This Notification must be duly completed and bear all the required signatories.
2. If any of the response to Part C – Part H is “No”, it has not satisfied the stipulated requirements for the
installation and use of tower crane.
3. For sites having more than 3 tower cranes, an additional Notification is to be made.
4. All documents shall be retained by the occupier and to produce them when requested by OSHD

S/No Item TC1 TC2 TC3

A) PARTICULARS OF OCCUPIERS

1. Factory Permit No
2. Name of factory occupier

3. Address where tower crane is to be installed

4. Postal Code Singapore ( )

5. Expected date of installation
6. Expected date of dismantling

B) PARTICULARS OF TOWER CRANES

7. Model of tower crane(s)
8. Jib Type (Saddle / Luffing)
9. LM Certificate No.
10. Tower crane's Serial No.
11. Type Approval No.
12. Maximum Design Safe Working Load (DSWL)
13. Year of Manufacture

C) PROPOSED CONFIGURATION OF TOWER CRANE

14. Jib length
15. Final Height-Under-Hook (HUH)
16. Availability of an efficient braking or locking
mechanism installed directly onto the luffing
drum to prevent the free-falling of luffing jib– for
luffing jib tower crane? (Y/N/Not applicable)
17. Is the final height of the tower crane within the
approved AMSL by the authorities? (Y/N)
D) THIRD PARTY INSPECTION REPORT (NDT BY SAC-SINGLAS ACCREDITED TESTING AGENCY)
18. Availability of NDT report for tower cranes used
locally for 8 or more years? (Y/N/Not applicable)
19. Availability of NDT report for used tower cranes
that are 5 or more years old brought in from
overseas? (Y/N/Not applicable)

2
E) FOUNDATION
20. Has the tower crane foundation been designed
and endorsed by a PE? (Y/N)

21. Is there PE's Letter of Undertaking for the

structural design of the foundation? (Y/N)

22. Is there PE’s Letter of Undertaking for the

supervision of the construction of the
foundation? (Y/N)
F) WALL TIE [ for tower crane(s) that exceed the free standing height of 40m ]
23. Is the wall tie designed by a PE? (Y/N)
24. Is there a side elevation of the tower crane/s
endorsed by the PE who designed the wall ties
indicating clearly the HUH and position of each
wall tie? (Y/N)
G) LAYOUT PLANS
25. Does the layout plan have all the necessary
information as stipulated under paragraph 5 of
the guidelines? (Y/N)
26. Is the layout plan endorsed by an authorised
examiner? (Y/N)

H) RISK ASSESSMENT
27. Has risk assessment been conducted to
eliminate or reduce the hazards identified for the
installation, use, maintenance, alteration and
dismantling of the tower crane? (Y/N)
28. Has safe work procedures been developed and
implemented for the installation, use,
maintenance, alteration and dismantling of the
tower crane? (Y/N)
I) PERSONNEL
29. Name of Approved Crane Contractor installing
the tower crane

30. Name of Approved Crane Erector(s)

31. Name of Tower crane Operator(s)

32. Name of Lifting Supervisor(s)

DECLARATION:
I have read, understood and fully aware of the requirements and my responsibilities as stated in the
Guidelines. I also undertake that all the information stated herein is true and correct.
Applicant Occupier’s Representative Authorised Examiner

Name :

Designation :

Tel / Fax / Email :

Date :

Signature :

Company’s Stamp :

3
 GUIDELINES FOR THE NOTIFICATION FOR
USE OF TOWER CRANE IN WORKPLACE

CONTENT Page
1. INTRODUCTION............................................................................................................................ 5

2. TOWER CRANE TYPE .................................................................................................................. 5

3. USED TOWER CRANES (IMPORTED FOR FIRST USE)............................................................ 5

4. USED TOWER CRANES (WITH EXISTING LM CERTIFICATE).................................................. 6

5. LAYOUT PLAN............................................................................................................................... 6

6. DESIGN AND CONSTRUCTION OF FOUNDATION / WALL TIE ................................................ 7

7. INSTALLATION .............................................................................................................................. 7

8. RISK ASSESSMENT...................................................................................................................... 8

9. STRUCTURAL REPAIR OF TOWER CRANE............................................................................... 8

APPENDIX 1 - DOCUMENTS TO BE RETAINED BY THE OCCUPIER ............................................... 9

APPENDIX 2 - REQUIREMENTS FOR TOWER CRANES ................................................................. 10

APPENDIX 3 - THIRD-PARTY INSPECTION REQUIREMENTS ........................................................ 11

APPENDIX 4 - ACCEPTANCE CRITERIA FOR THE LAYOUT OF TOWER CRANES ...................... 12

APPENDIX 5 - INSPECTION OF TOWER CRANE BY AN AUTHORISED EXAMINER (AE)............ 14

APPENDIX 6 - CHECKLIST FOR INSPECTION & TESTING OF TOWER CRANE ........................... 15

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1. INTRODUCTION

1.1 With effect from Oct 2006, occupiers of workplaces need not seek written approval from the
Occupational Safety and Health Division (OSHD) for the installation of tower cranes in their
workplaces. Occupiers will now need only to submit a Notification Form to OSHD at least
three (3) days prior to the installation of the tower crane(s).

1.2 Anyone who intends to install and use tower crane in a workplace (e.g. factory, worksite or
shipyard) shall complete the “Notification Form for Use of Tower Crane In Workplace”
and submit this Notification Form to OSHD at least three (3) days before the proposed
installation date.

1.3 The occupier shall ensure that the tower crane is inspected and tested by an Authorised
Examiner (AE) and had received a valid report of examination issued by the AE, prior to
operating the tower crane.

1.4 The occupier shall retain the documents as specified in Appendix 1 and produced them for
inspection when requested by OSHD.

2. TOWER CRANE TYPE

2.1 Only tower cranes that are manufactured in accordance to acceptable international standards
and codes are allowed to be used in Singapore.

2.2 All new tower cranes shall be type-approved for use in Singapore. For more details on the
type approval of tower cranes, please refer to the URL:
http://www.mom.gov.sg/Documents/safety-health/factsheets-circulars/Type%20Approval%20of%20
Tower%20Cranes.pdf

2.3 Applications for type approvals of all new tower cranes shall be made directly to OSHD.

3. USED TOWER CRANES (IMPORTED FOR FIRST USE) (see Appendix 2)

3.1. All used tower cranes brought in from overseas and to be registered for use for the first time,
shall satisfy the following conditions:
• It must be a model type-approved for use in Singapore; and
• It must be accompanied by a recent (not more than 2 years) inspection certificate from
the statutory inspection authority of the country where it was last used.

3.2. Used tower crane from overseas that is 5 or more years old (from the date of manufacture)
shall be subjected to an inspection by a third-party inspection agency acceptable to the
Commissioner for Workplace Safety and Health (hereafter known as Commissioner). The
third-party inspection requirements can be found in Appendix 3.

3.3. Used tower cranes of the following will not be permitted for use in Singapore:
• Tower cranes from countries that do not have requirements on statutory inspection; or
• Tower cranes which are 15 or more years old (from the date of manufacture); or
• Tower cranes with inspection certificate from country of last use issued more than 2 years
ago.

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4. USED TOWER CRANES (WITH EXISTING LM CERTIFICATE)

4.1 Tower cranes already approved and registered for use in Singapore, i.e. those with an
existing LM certificates, and which are 8 or more years old (from the date of manufacture)
shall have to undergo a third-party inspection before each installation. (see Appendix 3)

4.2 Tower cranes which are 15 or more years old (from the date of manufacture) will not be
allowed to use unless the occupier or owner obtained a letter from the manufacturer certifying
that the tower crane can be safely used for a longer period. Tower cranes of 20 or more years
old (from the date of manufacture) will not be allowed for use.
4.3 Non-Destructive Tests shall be carried out by a testing agency that is accredited to the SAC-
Singlas for the particular scope of testing.

5. LAYOUT PLAN

5.1. The occupier shall retain the latest layout plans at the site office showing clearly the zones of
influence of the tower crane(s) with respect to the workplace (site) in accordance to the
Acceptance Criteria for the Layout of Tower Cranes outlined in Appendix 4.

5.2. The layout plan shall be drawn to scale and shall contain the following information:

• Model of the tower crane(s) (consistent with the notation used in the Notification).
• LM Number for each tower crane.
• The respective height-under-hook (HUH) of each tower crane.
• The tower crane(s) zone of operation and collapse;
• Location of the loading and unloading area;
• Adjacent areas up to 100 metres outside the factory boundary, indicating the buildings,
structures, MRT tracks and etc. which fall within these areas;
• Areas that are affected should the tower crane collapse. In the event of a collapse, the
maximum reach of the collapsed tower crane should be at least 6 metres away from the
outermost edge of any MRT track, viaduct or station; or such clearance, which was
granted by the LTA;
• A side elevation of the tower crane(s) indicating clearly the HUH and position of each wall
tie that will be installed as per design by the Professional Engineer;

5.3. The occupier shall ensure that the layout plan is checked and endorsed by an AE for full
compliance to the requirements stated in paragraph 5.2 and Appendix 4.

5.4. By endorsing on the layout plan, the AE is deemed to have certified that the layout plan has
met the acceptance criteria stipulated in Appendix 4 and the requirements stated in
paragraph 5.2. Disciplinary action will be taken against the AE if it is found that the AE
had endorsed the layout plan contrary to the requirements.

5.5. The AE shall also at the time of testing and examination of the tower crane(s), check and
certify that the layout of the tower crane(s) at the site complies with that drawn on the layout
plans.

5.6. The occupier shall ensure that the registered crane operator, appointed lifting supervisor,
riggers and signalmen have seen the approved zone of operation, by having them to sign on
the layout plan as acknowledgment.

6
6. DESIGN AND CONSTRUCTION OF FOUNDATION / WALL TIE
6.1. The tower crane’s foundation and wall tie (if applicable) shall be designed and supervised
during its construction by a Professional Engineer (PE) of the relevant discipline. The PE
must consider the following when designing the foundation:

• The final height and configuration of the tower crane;

• All applicable forces - wind loading, vertical and horizontal forces, moments and torques
associated during the in-service and out-of-service conditions and to select the more
conservative forces for use in the design.
6.2. Suitable wall ties (designed by a PE) shall be installed if the tower crane exceeds a free
standing height of 40 metres. The wall tie design shall include a side elevation of the tower
crane(s) endorsed by the PE who designed the wall ties indicating clearly the HUH and
position of each wall tie.

6.3. The occupier shall obtain a copy of the design drawing and calculations endorsed by the PE
and a load data sheet together with a letter of undertaking stating that the PE would be
supervising the construction of the foundation/wall ties.

6.4. After completing the construction of the foundation/wall ties, the PE shall issue a certificate to
confirm that he had supervised the construction and the foundation/wall ties were constructed
to conform to his design.

6.5. The AE is to verify that the free standing height of the tower crane does not exceed 40m with
and without the installation of the wall ties. The AE is also to verify that the wall ties are
constructed as per the design of the PE.

6.6. The occupier shall retain the above documentation and make available for inspection when
requested by OSHD.

Note: A Professional Engineer (PE) refers to a person who has a valid registration with the
Professional Engineers’ Board, Singapore

7. INSTALLATION
7.1. Siting

a) The tower crane must be installed at the position as indicated in the layout plan. All
installations of tower crane must be in accordance with the instructions contained in the
manual issued by the manufacturer.

b) The installation, alteration, dismantling and repair of the tower crane shall only be carried
out by an approved crane contractor.

7.2. Pre-installation checks

a) All load bearing parts and safety devices of the tower crane must be checked by an AE
before the Installation. They must be of good construction, sound material, free of patent
defects and of adequate strength.

b) If possible, use new bolts/pins or other connecting fasteners for the bottom 3 mast
sections. The supplier or owner must ensure that only original load bearing members
from the manufacturer are used for the Installation. A letter of undertaking shall be
submitted at application.

c) Bolts/pins or other connecting fasteners of 8 or more years old shall not be used.

7
7.3. Installation

a) All mast sections shall be erected only to a height necessary for immediate needs and
extended in height only when construction has progressed. Mast sections shall be tied to
the building at intervals as may be specified by the manufacturer. It shall be plumbed and
securely tied to ensure stability and rigidity.

b) Suitable wall ties (designed by PE) shall be installed if the tower crane exceeds a
free standing height of 40 metres. Occupier or owner must seek the
Commissioner’s approval if he wants to erect the tower crane exceeding a free-
standing height of 40 metres.

7.4. Modifications

a) Tower crane must be re-inspected by an AE if there is any modification to the load

bearing members of the tower crane including changes to the length/height of the
boom/tower and addition/removal of tiebacks.

b) The re-inspection shall include a load test. A new LM certificate must be issued for the
test.

c) Such modification shall only be carried out by an approved crane contractor upon
approval from the manufacturer and certified by an AE.

8. RISK ASSESSMENT

8.1 Risk assessment of the various types of work processes (such as installation, alteration, use,
maintenance and dismantling of tower crane) shall be conducted to evaluate the risks to the
safety and health of employees to which they are exposed while they are at work. Where the
risks are significant, appropriate measures must be developed, implemented and maintained
to eliminate or reduce the risks.

8.2 The occupier of the workplace is responsible to ensure the risk assessment is conducted by a
team comprising representatives from the occupier, the equipment supplier, the equipment
operator and etc. The occupier shall also ensure that safe work procedures are developed
and implemented before carrying out such work. The safe work procedures shall include the
safety precautions to be taken in the course of work and during an emergency; and the
provision and use of personal protective equipment.

8.3 The occupier is to ensure that the safe work procedures are effectively communicated to all
relevant parties such as the approved crane contractor, crane operator, lifting supervisor,
signalman, rigger and etc.

8.4 For more information on the conduct of risk assessment, please refer to the following URL:
http://www.mom.gov.sg/workplace-safety-health/safety-health-management-systems/
Pages/risk-management.aspx

9. STRUCTURAL REPAIR OF TOWER CRANE

9.1. Any one who intends to carry out any structural repair of a tower crane, which may affect its
safe use, must notify the Commissioner at least 3 days prior to its commencement.

9.2. Such repair must be carried out by an approved crane contractor, in accordance to the
manufacturer’s instructions.

-End-

8
 APPENDIX 1 - DOCUMENTS TO BE RETAINED BY THE OCCUPIER

The occupier shall retain, but not limited to, the following documents at the site office:
a) A copy of the factory licence.

b) Tower crane(s) layout plan as endorsed by the Authorised Examiner.

c) Previous LM Certificate; or Manufacturer’s certificate with the corresponding conformity

certificate; or certificate issued by the overseas statutory inspection authority.

d) A copy of the Type Approval Document with the corresponding letter of conformity (for tower
cranes without LM certificate with effect from 1st April 2004).

e) Third-party inspection report (if applicable).

f) Design drawings and calculations of the foundation and wall tie design (if applicable) certified
by the Professional Engineer.

g) Letter of undertaking from the Professional Engineer who will supervise the construction of
the foundation of his design.

h) Letter of undertaking from the Professional Engineer who had supervised the construction of
the foundation in accordance to his design.

i) Letter of undertaking from the supplier that only original load bearing members from the
manufacturer are used for the installation.

j) Approval letters from the relevant regulatory authorities, e.g. Civil Aviation Authority of
Singapore, Ministry of Defence, Land Transport Authority, Singapore Land Authority.

9
 APPENDIX 2 - REQUIREMENTS FOR TOWER CRANES

The following table shows the requirements for the categories of tower cranes that are acceptable to
be used in Singapore:

Tower crane Type Requirements

New tower crane Manufacturer’s certificate with the corresponding conformity

certificate1

Used tower crane already in use Less than 8 years old - Previous LM Certificate
locally
8 or more years old - Previous LM Certificate and third-party
inspection2

Used tower crane brought in from Less than 5 years old - Inspection certificate from the country
3
overseas of last use and issued not more than 2 years ago

5 or more years old but less than 10 years old - Inspection

certificate from country of last use3 and issued not more than 2
years ago; and third-party inspection2

Inspection certificate from country of last use3 issued more

than 2 years ago – Not allowed to be used.

10 or more years old4 - Not allowed to be used.

1
Tower cranes are to be manufactured in accordance to acceptable internationally standards and
Codes
2
Third-party inspections are to be done by either an AE or any of the third-party inspection agencies;
or by a party prescribed by the Commissioner
3
Inspection certificate must be issued by the statutory inspection authority from the country of last use
(eg : HSE certificate for tower cranes from United Kingdom)
4
From date of manufacture

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 APPENDIX 3 - THIRD-PARTY INSPECTION REQUIREMENTS

1. If there is a need for a third-party inspection, it should be conducted by an acceptable third-

party inspection agency, or any AE authorised to act as a third-party by the Commissioner.

2. All Non-Destructive Tests shall only be carried out by a testing agency, which is accredited to
the SAC-Singlas for the particular scope of testing.

3. The inspector shall inspect all parts of the tower crane. A comprehensive survey report shall
include the following defects: -
a) Corrosion
b) Cracks (especially at weldments)
c) Dents and bends at members
d) Signs of fatigue
e) Other defects

4. If the defects can affect the safe operation of the tower crane, the AE inspecting the tower
crane shall not approve the tower crane for use.

5. The inspector shall carry out magnetic particles inspection (MPI) to check for surface or sub-
surface flaws at weldments at critical parts of the tower crane, such as at the mast sections,
slewing ring, tie-rod brackets, etc. If necessary, MPI should be conducted at all other
weldments if the inspector, after the visual inspection, finds it necessary. Radiography of the
weldments may also be used.

6. Random ultrasonic thickness measurements should be conducted at various points to confirm

that significant thinning of structural components has not occurred.

7. The inspector shall after completion of his inspection and tests, prepare a report on his
inspection, stating the observations made and the suitability of the tower crane for use. He
shall append to his report, the results of the MPI and ultrasonic thickness gauging made on
the tower crane.

Note: Inspector refers to an inspector from a third-party inspection agency or an authorised examiner.

11
 APPENDIX 4 - ACCEPTANCE CRITERIA FOR THE
LAYOUT OF TOWER CRANES

The table below shows the acceptance criteria for tower cranes to be used:

Issues Criteria

For Saddle Jib (Hammer-head) Tower Crane

The Zone of Operation is within the factory boundary.

unless:

• Slewing limit switches are installed (and indicated on the plan) to prevent the
jib from slewing beyond the factory boundary; i.e. the tower crane shall not
slew 360 degrees.

For Luffing Jib Tower Crane

1. To conduct Risk Assessment with control measures on the proposed use of

luffing jib tower crane. The control measures shall be reviewed and
endorsed by an AE.
Zone of
Influence 2. To implement and maintain records for the safe use of luffing jib tower crane.
(includes both
jib and
3. The Zone of Collapse is within the factory boundary.
counterjib)
unless:

• The collapsed zone lies within uninhabited areas or non-public access

areas;

• The tower crane is sited such that it is within or surrounded by the

building/s under construction; i.e. the zone of collapse is mitigated by the
building structure.
Written acknowledgement and agreement from the owner of the adjacent
properties that their property lies within the zone of collapsed shall be
obtained.

4. The luffing jib tower crane when not in operation shall be so parked within
the zone of collapsed as proposed in the layout plan.

Crane to crane For factory with more than one tower crane, crane-to-crane interference must
interference be prevented by suitable devices, such as slew or trolley limit switches or anti-
collision device. The zone of influence of the counter-weight jib must not
interfere with the zone of influence of another tower crane. The minimum
horizontal buffer distance between the jibs / counter-jibs of both tower cranes
shall not be less than 3 metres.

Height Where the zone of influence of two or more tower cranes interferes with one
Separation another within a site, there must be a height separation of at least 3 metres
vertically between the jib of a tower crane to the highest point of the other tower
crane or structure within the zone of influence.

Note : The zone of collapse refers to the affected area in a worst case scenario should a tower
crane collapse completely, i.e. both mast and jib.

12
 APPENDIX 4 - ACCEPTANCE CRITERIA FOR THE LAYOUT OF
TOWER CRANES

1. The occupier and AE shall ensure that:

a) The jib, counterjib and counterweights of the tower crane shall not over-sail or
interfere with any buildings, structures, bridges, public roads or areas within the
railway protection zone (ie 40m from the outermost edge of the rapid transmit
system structure), unless the owner/occupier of the tower crane has obtained the
consent from the occupant of the building or relevant authorities (eg LTA), etc
allowing the jib of the tower crane to over-sail the building or public roads.

b) The written consent shall be accompanied by a proposal by the occupier stating

down preventive measures to be taken if the jib is over-sailing the building or road
(e.g. special hoarding or periodic road closure).

c) The jib or counterjib of the tower crane shall not over-sail any school, petrol
station, community clubs, places of worship or any other public buildings
beyond the factory boundary. This is regardless whether permission had been
obtained by the owner of the establishment.

2 Written approvals shall also be obtained from the Civil Aviation Authority of Singapore and
Ministry of Defence for the Installation of the tower crane. This is to ensure that the tower
crane, among other things, will not interfere with their activities.

3 The addresses of the relevant authorities are as follows:

(a) Director-General of Civil Aviation
Civil Aviation Authority of Singapore
Singapore Changi Airport
P.O. Box 1
Singapore 918141

(b) Manager
Development & Building Control
Land Transport Authority
PSA Building
460 Alexandra Road #19-00
Singapore 119963

(c) Head, Air Plans

Air Plans Dept, HQ RSAF
Mindef Building
Gombak Drive
Singapore 669638

13
 APPENDIX 5 - INSPECTION OF TOWER CRANE BY AN
AUTHORISED EXAMINER (AE)

1. An AE engaged to carry out the inspection of a tower crane shall ensure that:

a) The tower crane is of the type indicated in the Notification submitted to OSHD.

b) The tower crane was sited as indicated by the plan.

c) The foundation had been designed and certified by the Professional Engineer (PE) of
a relevant discipline and constructed accordingly.

d) He checks the tower crane before the Installation to establish that all parts of tower
crane used are of good construction, sound material, free of patent defects and of
adequate strength.

e) The installation was in accordance with the manufacturer’s instructions; and

f) He carried out an inspection of the tower crane after the Installation, including a load
test. The load test shall be conducted at both its maximum and minimum working
radii, with sufficient load to test its safe operation.

g) The operation of the tower crane is in compliance with requirements under Appendix
4.

2. The AE shall retain a copy of the LE certificate issued by him together with the duly
completed Checklist for inspection & testing of tower crane (see Appendix 6), and
produced them to OSHD upon request.

3. The AE shall also ensure that an operation log-book is available and updated by the
registered tower crane operator.

14
 APPENDIX 6 - CHECKLIST FOR INSPECTION & TESTING OF TOWER CRANE

Factory No.
Occupier
Location
Name of Approved Crane
Contractor/Erector

LM No. Serial No. Brand/Model Year Manufactured

Pre-Installation Checks Date / Time:

S/No. Item Yes / No Remarks

1 The tower crane was of the type submitted to the

Occupational Safety and Health Division. (OSHD).

2 All bolts/pins or connecting fasteners used are in accordance

to manufacturer’s design and readily identifiable.

3 All mast sections have identification markings.

4 a) All mast sections are free from defects and corrosion that
may affect their structural integrity.

b) Non-destructive testing not required to establish this.

5 Random samples of all bolts/pins or connecting fasteners

used are non-destructively tested for any defects.*
Number of bolts/pins used
Sample size
(excluded those used at the bottom 3
required
mast sections)
9 to 15 5
26 to 40 10
41 to 65 15
66 to 110 20
111 to 180 25
181 to 300 30
6 a) Random samples of all slew ringbolts used are tested for
any defects. These bolts should be taken from positions
on the slew ring that are mutually 90 degrees apart and
identified in some manner that is indicative of their original
position.*

b) Non-destructive test is conducted on the welding of the

slew ring attachment to the slew ring mount.

7 The machine deck is free from any corrosion or defect that

may affect its structural integrity.

8 The operator’s cabin is free from any defects that may affect
its serviceable use.

15
 Pre-Installation Checks Date / Time:

S/No. Item Yes / No Remarks

9 A safety bar is fitted across the operator’s cabin window

where there is likelihood of the operator falling through it.

10 An approved fire extinguisher is provided in the operator

cabin.

11 An emergency stop button, which will terminate the operation

of the crane engine, is installed in the operator cabin and
correctly identified.

12 All controls are checked for correct identification.

13 The hydraulic system is free from any oil leaks.

14 All the brake and clutch mechanisms have been stripped and
serviced.

15 An emergency load lowering device is fitted.

16 All rope anchorages are serviced.

17 All counter-weight attachments, trolley, trolley wheels etc.,

are serviced and free from defects.

18 The cat-head including the tie-rods are free from any defects
that may affect its serviceable use.

19 All jib sections are free from defects and corrosion that may
affect their structural integrity.

20 All main cords on each jib section are thickness tested to

detect internal corrosion. .

21 All sheaves and bearings are free from any defects that may
affect their serviceable use.

22 The hook, hook block, overhauling weight and associated

attachments are free from wear and damage.

23 The climbing frame and equipment is free from any defects

that may affect their serviceable use.

24 The foundation has been designed; and certified by a

Professional Engineer of the relevant discipline and
constructed accordingly.

16
 Installation Checks Date / Time:

S/No. Item Yes / No Remarks

25 The tower crane is sited as indicated in the layout plans

endorsed by the Occupational Safety and Health Division.

26 The installation is in accordance with the configuration and

manufacturer’s instructions.

27 The bolts/pins or other connecting fasteners used for the

bottom 3 mast sections are new ones.

28 The tower crane is plumbed to check that it is vertical.

29 All the pins/bolts or fasteners used for the assembly are fitted
with safety pins or locking pins.

30 Bolts are tightened to the correct torque.

31 Tie rods to the boom and jibs are securely fastened.

32 Tie-backs are fastened as per designed.

33 Fixed access ladders are provided for access to all

serviceable parts of the tower crane.

Other Tests / Checks Date / Time:

S/No. Item Yes / No Remarks

34 The tower crane is load tested at both its maximum and

minimum working radii with sufficient load.

35 Limit switches are tested :

a) overhoist limit switch

b) overload limit switch
c) trolley limit switch
d) slewing limit device

36 A load-radius indicator with warning signal is installed and in

good working condition.

37 All safety devices and brakes are checked.

38 Wind anemometer is installed and in good working condition.

39 Anti-collision devices are tested to stop the tower crane’s

operation such that the crane-to-crane interference must be
maintained at not less than 3 metres.

Other Remarks:

Name & Signature of authorised examiner: _____________________________________________

Date : ________________________

17