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IS 13082-1 (1991): Bulk handling equipment - Ship unloader

- Gantry mounted grab type - Code of practice for design,
manufacture and erection, Part 1: Mechanical and structural
requirements [MED 7: Material Handling Systems and
Equipment]

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Satyanarayan Gangaram Pitroda

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(Reaffirmed 2001)

Indian Standard

BULK HANDLING EQUIPMENT -SHIP

GANTRY MOUNTED GRAB
UNLOADERTYPE -CODE OF PRACTICE FOR DESIGN,
MANUFACTURE AND ERECTION
PART

MECHANICAL

UDC

AND

STRUCTURAL

REQUIREMENTS

621.869.2 : 629.12 : 006.76

@ BIS 1991

BUREAU
MANAK

Decembdr 1991

OF

INDIAN

STANDARDS

BHAVAN, 9 BAHADUR SHAH ZAFAR MARO

NEW DELHI 110002

a
Price Group6

Bulk Handling

Equipment

Sectional

Committee,

HMD 07

FOREWORD
This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by
the Bulk Handling Equipment Sectional Committee had been approved by the Heavy Mechanical
Engineering Division Council.
There are various types of ship unloaders
used, main
These could be mounted on the gantry or crawler/tyres.
Ship unloaders are important
materials shiped.
This standard

will be published

functional

sub-system

in three parts.

types

being

of unloading

continuous

and grab type.

and transportation

of bulk

Other parts are:

Part 2 Electra-mechanical
requirements
Part 3 Information
to be supplied by the purchaser

and the manufacturer.

The requirements given in this standard are as guidelines and not-withstanding

the requirements
to be fulfilled by the purchasers and the manufacturers
in accordance with statutory acts, rules,
regulations or otherwise specified by other authorities.
This standard
manufacturers

is expected to provide a uniform

of such ship unloaders.

practice

to be adopted

by the purchasers

and

In the preparation of this standard, assistance has been derived from the publication on Heavy
Lifting Appliances - Rules for the Design of Hoisting Appliances by Federation Europeenne De La
Manutention and IS0 5049/l-1980 cMobile continuous
bulk handling equipmenl-Part
1 : Rules
for the design of structures issued by t.he International Organization for Standardization
( IS0 ).

IS 13082 ( Part 1 ) : 1991

Indian Standard

BULK HANDLING EQUIPMENT-SHIP

GANTRY MOUNTED GRAB
UNLOADERTYPE -CODE OF PRACTICE FOR DESIGN,
MANUFACTURE AND ERECTION
PART

MECHANICAL

AND

STRUCTURAL
3.1.3 Lifting

1 SCOPE

structural,
This Standard covers mechanical,
inspection and testing requirements relating to
the design, manufacture, and erection of gantry
mounted grab type ship unloader provided with
horizontal boom and grab-bucket.
2 REFERENCES

The Indian Standards

listed in Annex
necessary adjuncts to this standard.

A are

3 DESIGN REQUIREMENTS OF UNLOADER

MECHANISM

main constituents
loader consists of:

3.1.4 The ship unloader shall be designed and

manufactured
to take care of the variations in
the height of deck level above water level for
the specified parameters.
3.1.5 The material
of construction
of the
various parts of the unloader shall be suitable
to handle the material specified.
3.1.6.1 The safety

of the ship un-

a) Drive mechanisms:
1) Long travel mechanism,
2) Trolley travel mechanism,
3) Grab hoisting arrangement,
4) Grab closing and opening arrangement,
5). Boom luffing arrangement, and
6) Operators cabin travel mechanism.

b) Machinery house
cl Gantry
4 Tower structure/boom
e) Grab bucket
f) Discharge mechanism
k9 Operators cabin
h) Communication and controls
0 Auxiliary and accessories:
1 Dust collection system, and
2 Counter weight.
3.1.2 The ship. unloader

attachments
shall be provided for
placement of payloaders
and bull-dozers and
placing them in ships hold for clean-up
purposes.

3.1.6 Safety Regarding Over-turning

3.1 General
3.1.1 The

REQUIREMENTS

shall be designed to
take care of main, additional and special loads
in accordance with IS 13148 : 1991.

be in accordance

regarding overturning shall

with 11 of IS 13148 : 1991.

3.1.1 Safety Regarding Drifting

3.1.7.1 Safety

accordance

regarding drifting
shall
with 12 of IS 13148 : 1991.

be in

3.1.8 Safety Against Movement by the Wind

Independently
of the stability against overturning, a check shall be made that the unloader
cannot be set in motion by maximum wind
increased by 10 percent.
This check shall be
carried out assuming a coefficient of friction
equal to 0.14 for braked wheels, and a resistance
to rolling of lOON/lOkN for unbraked wheels
mounted on anti-friction
bearings or of 150N/
1OkN for bushed wheels. For the design of
clamps the coefficient
of friction between the
clamps and the rail shall be taken as O-25.
3.2 Operating Requirements
3.2.1 Where so specified/required
the operation
of the various controls shall be automatic/semiautomatic/manual.
Programmable logic controls
( PLC ) are recommended
for automatic
and
semi-automatic
mode of operation. However in
all cases manual
override
facility shall be
provided.
All operations
of the unloader
including its long travel shall be controlled
from the operators cabin.
1

IS 23082 ( Part 1) : 1991

\

3.2.2 The operators cabin shall be pressurised

so as to prevent ingress of dust. A minimum of
30 air changes per hour and a pressure
of 50 mm water gauge inside the cabin shall be
maintained.

may be provided.
The troIIey frame shal1 be
fitted wi<h drop stops to prevent damage in the
event of axle failure.
Resilient buffers shall be
provided to each corner of the trolley arranged
to engage with stops attached to boom.

3.2.3 Dust cbllection

and abetment shall be
provided at all material transfer points and the
dust exit to atmosphere
shall not exceed
10 mg/m3 or the minimum statutory provisions
for pollution control, whichever is less.

4.3 Grab Hoisting and Opening/Closing

Grab hoisting shal1 be done by means of wire
rope and winch sytem installed in the ma.chinery
house. The system shall be a two rope type.
Provision shall be made for inching facility for
the hoisting operation.

3.2.4 In case of windvelocityexceeding

60 km/h,
an, audio-visual
signal shall be given by the
anemometer and at 72 km/h, the total power
shall be cut off and the hydraulic
rail clamps
shall get operated alongwith brakes applied to
all motions.

4.4 Boom Luffing

The Iufing/foIding
of the cantilever boom shall
be with the help of winches/hoists.
SuitabIe
sIow speed devices shaI1 be provided during
starting and also just before the boom is latched
automatically
through a mechanical device. A
positive interIocking
system shall be provided
such that the luffing movement
of the boom
shall be possible only when the trolley and the
operators cabin are brought to the predetermined pcsitions beyond the hinge point inside
the tower.

3.2.5 All drive limit switches shall be provided

with additional back up switches and all brakes
shall be fail safe type.
3.2.6 Provision shall be made to provide two
way communication
between the ship unloader
operator
and central
control
desk. If so
specified, suitable communication
system shall
also be provided between the ship unloader
operator and local personnel.

4.5 Operators Cabin

4.5.1 A self driven type operators

cabin which
is capable of moving along a line parallel to the
trolley runway shaI1 be provided.

3.2.7 Smoke detectors

and fire extinguishers
shall be provided at suitable locations.

4.5.2 The cabin shall be of adequate size to

permit entry of and house all the required
control equipment and _shall contain sample
room for its adjustment and repair. The cabin
shall face towards the centre line of the trolley
runway and shall be provided with glazed
windows on all sides to give the operator an
unobstructed
view of the bucket operations and
for moving the unIoader tower. The cabin shall
be furnished with sufficient facilities for comfortable seating of the operator
with provision of
height adjustment.

4 DRIVE MECHANISM
4.1 Long Travel
4.1.1 The unloader

shall be carried on double

flanged track wheels arranged in equaliser for
uniform
distribution
of loads. The travel
motion shall comprise of requisite number of
motors, suitably synchronised
at each corner.
The four corners of the unloader shall be
provided with resilient buffers to absorb the
impact.
4.1.2 Safety stops shall be fitted underside each
bogie to limit the drop in the event of wheel
axIe or bearing failure.

5 MACHINERY

HOUSE

5.1 A machinery

house accomodating
drive
mechanisms for grab operation, trolley travel,
boom luffing and electrical
equipment
like
switch gears, motor contro1
centre,
transformer, etc shal1 be provided.
Adequate space
for maintenance
and
aIsd
maintenance
faciIities Iike hoist shal1 be provided inside
machinery house.

4.1.3 Minimum 50 percent of wheeIs at each

corner shall be driven. Rail sweeps to clear
rails shall be provided in front of outer wheels.
Buifers shall be provided at each corner of the
carriage.
4.2 Trolley Travel

5.2 Wire Ropes and Rope Drums

Trolley shall be of robust design and mounted

on wheels with antifriction
bearings. Suitable
take-up device shal1 be provided for keeping
the rope in tension in case of rope driven
mechanism. AIternativeIy seIf driven type troIley

Wire
shall
shall
shall
2

ropes shall conform to IS 2266 : 1977 and

be of best pIough steel. Pactor of safety
be as per IS 3177 : 1977. Wire rope system
be provided with quick releasing shackles

ES 13882( Part 1) : 1991

for changing the grab quickly. Rope drums and
sheaves shall conform to the requirements
laid
down in IS 3177 : 1977.
5.3 Bearings

b) That it shaI1 alIow the appliance

to
perform its normal duty without abnormal
wear.
5.7.2.1 Diameter

All bearings shall be protected against dust and

grit. Allowance shall be made for impact and
side thrust.
Wherever
necessary
spherical
seatings and separate thrust bearings of suitable
dimensions shall be used. Antifriction bearing
used shaII have minimum life of 50000 working
hours.

of wheels

The tread diameters of wheels shall preferably

be standardised
to sizes specified in IS 1136 :
1958 connecting
at 150 mm, in order of
preference specified therein.
5.7.2.2 The minimum tread diameter of the
wheel may be calculated
from the formula
given below :

5.4 Couplings

D _ I.5 w
a

All couplings shall be of steel or cast iron of

Grade FG 300 of IS 210 : 1978 and shaI1 be
torque
designed
to
transmit
maximum
deveIoped.
PIexibIe couphng shall be fitted
between motor shaft and gear box extension
shaft.

where
D = tread diameter

of wheel in mm,
W = Wheel load in kg, and
a = full width of rail head (face to face )
including radii in mm.

5.5 Shafts
Shafts and axles shall have sufficient strength,
rigidity and adequate bearing surfaces. Shafts
subjected to cycIic Ioading shall be designed
for fatique Iife aIs0.

5.7.3 Flanges
The dimensions of flanges of track wheels shaI1
be not Iess than the values given in TabIe 1.
The thickness of flanges of non-guiding wheeIs
if flanged may be less than the vaIues given in
Table 1 as may be determined
by the unloader
manufacturer.

5.5.1 AI1 shafts shaI1 be made of carbon or

alloy steel. Keyways and splines shaI1 conform
to reIevant Indian standards.
5.6 Gears and Gear Boxes

5.8 Bolts, Nuts, Screws and Washers

Gears in power operated

motion
shaI1 be
machine cut and shaI1 conform to reIevant
Indian standards. Gear boxes shaI1 have builtin Iubrication system either splash or force fed
type.

Al1 bolts and set screws in rotating parts shall

be locked. Bolts in tension shall be avoided
wherever possible.
5.81 Tapered washers and tapered pads shaI1
be provided on underside of steel sections with
tapered flanges and shall be tack welded in
place.

5.7 Track Wheels

wheeIs may have cylindrical
or tapered
( conical ) treads, with flanges or any other
means as and where necessary, to guide the
unloader effectively and to prevent derailment.
The wheeIs shaI1 be mounted in such a manner
as to facilitate removal and replacement.
5.7.1 The track wheels shaI1 be of stee1 ( cast
or wrought ) or have stee1 tyres shrunk on and
registered. The steel of track wheeIs shall not
contain more than 0.060 percent
either
of
suIphur or phosphorous.
The whee1 shaI1 be
suitably hardened.
Track

Table 1

Flange Dimensions

( Clause 5.7.3)
All dimensions

in millimetres.

Diameter of Wheels

Up to and inciuding 300

Over 300 and including
500
Over 500 and including
1 000
Over 1 000

5.7.2 Rail Wheel Size

To determine
the size of a rai1 wheel, the
foilowing checks shall be made:
a) That it is capable of withstanding the
maximum load to which it shall be
subjected, and

Thickness of
Guiding
Wheel at
Flange Base

Depth of
Flange

15
20

15
20

25

25

30

30

IS 13082 ( Part 1) : 1991

5.8.2 All bolts and nuts shall preferably be in
accordance
with IS 1364 : 1983 and IS 1367 :
1980. Black bolts and nuts shall not be used.
Alternatively
friction grip fitted bolts may be
used where necessary for proper assembly.
5.8.3 Washers shall conform to IS 2016 : 1967,
IS 5372 : 1975 and IS 5374 : 1975 as appropriate.
5.9 Brakes
Brakes shall be of electro-mechanical
( electromagnetic ) electro-hydraulic
fail safe type.

6.5 Ladders
Sides of the ladders shall extend to a reasonable
distance above the platforms, or other reliable
hand holds shall be provided.
Ladders shalI if
possible,
slope
forward.
Vertical
ladders
exceeding 3 m in length shaI1 be provided with
back safety guards.
6.6 Lifts

5.9.1 Parking/storm
brakes shall be provided
for the travelling motion and they shall be
capable of holding the unloader in position
during storm conditions.
5.9.1.1 These brakes shall come
operation from the anemometer.

6.4 Guard rails on the grab side of the bridge

platform may be provided, if required.

A goods-cum-passenger
lift shall be provided
for the movement of men and material between
machinery house and the floor above the wharf
level. The lift shall conform to relevant Indian
Standard(q).

in automatic

7 GRAB BUCKET

5.9.1.2 For design of clamps, coefficient of

friction between the clamp and rail shall be
taken as 0.25.

7.1 Grab bucket shall be of robust design and

construction
suitable for handling the load as
required.

5.9.2 In addition
anchoring
device shall be
provided to positively
arrest the travelling
motion of the unloader under storm conditions.

7.2 Gra& buckets for the ship unloader shall be

of clamshell type. Bucket size shall be selected
considering the following factors:

5.9.3 Hoisting/lowering
and
boom
luffing
brakes shall be capable of taking 150 percent
of respective fuI1 load motor torque.

a) Size of hatch openings of the ship, and

b) Bulk density of the material to be
unIoaded.

6 GANTRY AND TOWER STRUCTURE

7.3 Bucket Iips shall be properly designed to

prevent leakage of material being unloaded.
When materials of different bulk densities are
to be unloaded, changing of grab buckets may
be necessitated to suit the particular material,
for which suitable reeving system and bucket
fixing arrangements shaI1 be provided.

6.1 The gantry and tower structure

shall be
designed to take care of the operational
ease of access and
requirements
including
maintenance.
The members of the structure
accordance
with
shall be
designed
in
IS 13148 : 1991 to take care of prevalent
environment conditions.

7.4 Separate holding and closing ropes shal1 be

provided
either with-two-rope
or four-rope
arrangements.
However four-rope arrangement
shall be preferred.

6.2 Safe means of access shall be provided to

the operators
cab and to every place where
any person engaged on the inspection, repair
and lubrication
of the unloader
shall be
called upon to work, adequate hand holds and
footholds
beings provided where necessary.
Hand holes and access openings shall be as per
relevant Indian Standard(s) where available.
6.3 Every platforms
shall be securely fenced
with double tiered
guard rails having
a
minimum height of 1.1 m and toe boards, unless
parts of the unloader structure provide safety.
The platform shall be of sufficient width to
enable, normal maintenance
work to be carried
out safely. On bridge platform, which shall not
be less than 0.75 m in width the fencing shall
extend along the full length of the outer edge.
A toe plate shall be provided on all platforms
to prevent
rolling down of materials from
platforms.

8 DISCHARGE MECHANISM
8.1 Hopper
A hopper shaI1 bg provided as a part of the
unloader
for intermediate
storage
of buIk
material fed from the grab.
8.1.1 Capacity of the hopper shaI1 be so as to
hold a minimum of ten discharges of theg rab.
8.1.2 VaIley angle and capacity
of hopper
shall be decided to effect proper materiaI flow
from the hopper.
8.1.3 A feeder of appropriate type and capacity
shall be provided at the hopper bottom for
feeding the materia1 to the conveyor.
4

IS 13082 ( Part 1 ) : 1991

8.1.4 A closing gate shall also be provided for
the hopper
above the feeder to facilitate
removal of feeder for maintenance
purposes.

10.4.1 Suitable interlock

features
shall be
provided for the boom hoisting so that boom
shall be raised only when operators
cab and
the grab bucket are
at their
innermost
positions.

8.1.5 Over
provided.

load

protection

9 PRESSURISATION
COLLECTION

devices

shah

be

10.4.2 A wind anemometer

to monitor wind velocity
provision.

AND DUST

shall
with

be provided
interlocking

9.1 Pressurisation

10.5 Guarding

Operators cabin shall be pressurised to prevent

ingress of dust. Pressurising
system shall be
provided to create a pressure of 50 mm water
gauge and 30 air changes per hour in the
cabin. All
machinery
house and operation
electronic controls provided
shall be housed
in an airconditioned
space.

All gear wheels, pinions and chain drives shall

be totally encased unless such parts are so
situated in relation to the structure of the
unIoader
as to be as safe as if complete
encasement
were provided.
Effective
guards
shah be provided for revolving
shafts and
couplings unless every set scnew, bolt or key
on any revolving shaft is sunk, shrouded, or
otherwise effectively guarded.

9.2 Dust Collection System

The dust collection system shall be capabIe of
collecting completely the dust which is raised
from the receiving hopper and also from all
other material transfer points of the unloading
system upto but excluding the discharge point
of the conveyor. Facility shalI be provided to
convey the dust collected
to the material
storage point.

10.5.1 Long traveI cross-shafts

throughout their length.

shah be guarded

10.5.2 The sheaves of hook blocks fitted with

two sheaves or Iess shall be guarded to prevent
the trapping of a band between a sheave and
the in-running rope.
10.5.3 Suitable guard shall be provided on the
downshop-lead
side to prevent
accidental
contact between ropes and live conductors.

9.2.1 Maximum permissible dust loading in the

exit air from the system shall not be more than
25 mg/m3. Protection against fire hazard shaII
be provided for the dust collection
system
when handling hazardous materials.

10.6 A suitabIe baIlast with its case shall be

provided as per the requirements to meet the
stability conditions.

10 SAFETY

11 LUBRICATION

REQUIREMENTS

10.1 The unloaders

shall comply with the
relevant safety regulations under the Factories
Act and Indian Electricity Rules and other
Statutory Regulation, Acts etc, as applicable.

11.1 Provision shall be made for lubricating

all bearings which shah be easily accessible
from the working platforms of the unloader.
11.2 Preferably
centralised
lubricati.on shall
be
provided;
where
not feasibIe
group
lubrication
shall be provided.
In any case
provision shall be made at the bearings to vent
excess lubricant pressure.

10.2 Fire protection

equipment
as per the
recommendations
of Fire Protection
Manual
of the Statutory Authority shall be complied
with.

11.3 Lubricating nipples, pipes and adapters

shall generally comply with relevent Indian
Standard(s).

10.3 Bders
Buffers shall be provided
unloader and troIley.

for

stopping

10.4 Limiting devices shall be provided

foIlowing movemets:

the

11.4 A lubricating
chart shall be provided
indicating all the lubricating points, the type
of lubricant
and recommended
frequency
of
Iubrication.

for the

a) Grab hoisting and lowering.

b) Trolley

movement
Long travel
d) Cabin movement
e) Boom luffing

12 WEATHER PROTECTION

( Grab )

AND PAINTING

12.1 AI1 eIectrica1, structural and mechanica

equipments shaII be adequately protected from
weather. All weather proof covers shah be
easily removabIe.

c>

IS 13082 ( Part 1) : 1991

12.2 The unloaders
work in the corrosive
atmosphere prevailing near sea-shores as well
as in the atmosphere containing dust particles
of the material. Unloaders
shall be provided
with two coats of anti-corrosive
primer aftersand blasting and final two coats of anticorrosive epoxy pa'int .

13.2.5 For lateral straightness

of trolley rail,
the centre axis of the trolley rail shall not
diverage from the theoretical centre axis of the
rail by more than fl.0 mm on a rail length of
2 m. There shall be no misalignments
at rail
joints ( see Fig. 5 ).
13.2.6 The axes of the wheels axle bores shall
be within an angular deviation in the horizontal
plane of f 0.04 percent from its theoretical
position ( see Fig. 6 ).

13 LOAD TESTS
13.1 Prior to being placed in service, unloader
shall be tested under overload
conditions,
as
follows.

13.2.7 The axle bores of the wheels opposite to

each other and if wheels are mounted in bogies
the axes of the bogie pins of the unwarped
trolley
and unloader bridge shall have an
alignment divergence
in the vertical plane,
less than O-15 percent, maximum 2 mm of the
trolley wheel centre distance ( see Fig. 7 ).

13.1.1 Dynamic Test

The dynamic test shall be carried out with a
load of 120 percent of the safe working load.
All motions shall be carefully operated in turn,
without checking speeds or temperature
rises
in the motors.

13.2.8 The centres

of wheels rolling on a
common rail shall not diverage more than f 1
mm from the rail centre ( see Fig. 8 ).

13.1.2 Static Test

The static test shall be carried out with a load
equal to 140 percent of the safe working load.
This test shall be carried out under still conditions and consists in hoisting the safe working
load to small distance above the ground and
then adding the required surplus without shock.

13.2.8.1 For bushed weels the above tolerances

apply with the wheel in a central position
between the wearing plates at either side of
the wheel boss.
13.2.9 If horizontal guide rollers are used, the
centre of the distance between guide rollers at
shall not deviate
more than
one corner
f 1 mm from the centre axis of the rail ( see
Fig. 9 ).

NOTES
1 The figures given for these test loads represent
minimum requirements.
Where material Legislation/
Rules or any other statutory
Acts or Requirements
call for higher values, these shall be complied with.
2 When making
these tests,
it is customary
to
measure
the deflection
of the structure
of an
unloader. In case the user wish to impose a deflection limit, he shall specify this in his call for tender/
enquiry.

13.2.10 The diameter tolerance

of the wheels
shall correspond to h9 as per IS 919 ( Part 1 ):
1963.
13.2.10.1 If runner
wheel speeds are synchronized
by an electrical
shaft,
tighter
tolerances may be required.
These shall have
to be determined from case to case.

13.2 Acceptable Tolerances

Acceptable tolerances on trolleys, and tracks
shall be as below.
13.2.1 The trolley rail centre distance <s shall
not differ from the nominal dimension by more
than &3 mm as shown in Fig. 1.
13.2.2 The difference in height of two opposite
points of the trolley track perpendicular
to the
travel direction of the trolley shall not exceed
0.15 percent
of the trolley rail centre distance,
with a maximum of 10 mm as shown in Fig. 2.
13.23 Trolley rails shall be laid in a way that
the running
surface perpendicular
to the
direction of the rail is horizontal and that the
greatest unevenness of the bearing surface is
not more than f3 mm for rail centres Upto 3m
as shown Fig. 3.
13.2.4 The centre of the trolley rail shall not
diverage from the centre of the rail girder web
by more than half the thickness of the rail
girder web as shown in Pig. 4.

13.2.10.2 The above tolerance

apply to non
driven wheels also as the wheels shall have to
be interchangeable.
13.2.11 Recommended tolerances for unloader
tracks are given below. These tolerances apply
to new unloader tracks. If in the course of use,
these tolerances are exceeded by 20 percent, the
track shall be re-aligned. In case the travelling
behaviour is noticeably
deteriorating,
it may
be necessary to re-align the track; even if the
tolerance excess has not reached 20 percent.
The
cs in
fors
for s

greatest divergence As from the span

metres is:
<15m:As=&3mm
>15 m : As = f [3+0*25 (s- 15)]mm
( maximum f 25 mm )

St 3mm

FIG. 1 TROLLEYRAIL DISTANCE

max 10mm

FIG.

L
PIG.

2 HBIGHTDIFFBRBNCE
OF TROLLEY

.s*3mm FOR sr3m

to.1 O/OOF,s FOR > 3m

3 RUNNING SIJRFACEOP TROLL= RAILS

7

IS 13082( Pari * ) i 1981

FIG. 4

TROLLEY

CENTREOF TROLLEYRAIL

RAILS

PIG. 5

LATERALSTRAIGHTNFUOF TROLLEYRAIL

-__--___-

, FIG 6

AXJSOF WHEEL AXLE BORES

IS 13082( Part 1 ) : 1991

0.15 O/o OF s

PIG. 7

AXLE BORESOF WHEELS

tlmm

CENTRE
FIG. 8

OF WHEEL

CBNTRESOF WHEELSOF SAME RAIL

DISTANCE
BETWEEN
GUIDE ROLLERS
FIG. 9

CENTRBDISTANCE BETWBENGUIDE ROLLERS

guide
rollers
are
the tolerances
for
the other rail only ( rail without guide rollers )
may be increased to three times the above
values, but shall not exceed 25 mm.
13.2.11.1 If

provided

13.2.11.3 The greatest permissible tolerance of

the upper edge of the rail shall be &lo mm
from the theoretical
height position.
The
theoretical
height is either the horizontal
posrti on or if- applicable,
the theoretical
camber curve. The height position of the two
rails may show a divergence
of 10 mm. The
curvature in a longitudinal
direction
may at,
each point of a measured length of 2 m, not
exceed a rise of f 2 mm.

horizontal

on one rail only,

13.2.11.2 It is assumed that with thetrolley

positioned
in the centre
of the span the
shall be
of
both
rail tracks
deflection
approximately
equal.
9

13.2.12 The

inclination
surface shall not exceed
as compared
with the
( see Fig. IO-).

of the rail rolling

the following values
theoretical
position :

Longitudinally
Laterally

: 0.3%

13.2.13.2 For unloaders guided on one rail only

the requirement
for the straightness
of the
non-guiding rail may be lowered.

: o-3:/,

13.2.13 For the _ total

length
of rail,
_
._ _.the
maximum lateral tolerance from a straight line
shall be f 10 mm.
The curvature
at the
longitudinal rail axis in a horizontal
direction
shall not exceed a lateral deviation of & 1 mm,
measured at 2 m rail length ( see Fig. 11 ).

PIG. 10

1I

13.2.14 For the values in 13.2.1 to 13.2.13 no

account has been taken for misalignment
at
the rail joints. It is recommended to use welded
raiI joints.

INCLINATIONOF RAIL

RANDLJM
FIG.

13.2.13.1 For unloaders guided on both sides

b;l horizontal rollers, the above values shall be
valid for the rail surfaces .of the horizontal
rollers.

SAMiL tNG

TOLERANCEON TOTAL LENGTHOF RAIL

10

IS 13082 (. Part 1) : 1391

ANNEX

( Clause 2 )

LIST OF REFERRED INDIAN STANDARDS

IS No.

210 : 1978

1136 : 1958
1364
( Part 1 ) : 1983

( Part 2 ) : 1984

( Part 3 ) : 1984

IS No.

Title

Grey

iron

revision )

919
( Part 1 ) : 1963

castings

( third

Part 9 Surface discontinuities

on bolts, screws and studs
( second revision )
( Part 10 ) : 1979 Part
10
disSurface
continuities
on nuts ( second

Recommendations
for limits
and fits for
engineering :
Part 1 General engineering
Preferred, sizes for wrought
metal products
Hexagon head bolts, screws
and nuts of products
grades
C : Part 1 Hexagon
head
bolts ( size range M5 to
M36 ) ( second revision )
Part 2 Hexagon head screws
( size range M5 to M36 )
( second revision )
Part 3 Hexagon
nuts ( size
range M5 to M36 (~second

revision )

( Part 12 ) : 1979 Part 12 Phosphate

coatings
on
threaded
fasteners
( second revision )
( Part 13 ) : 1979 Part 13 Hot-dip galvanized
coatings on threaded fasteners ( second revision )
14 Stainless
steel
( Part 14 ) : 1984 Part
threaded
fasteners
( second
revision )

system
( Part 16 ) : 1979 Part 16 Designation
and symbols ( second revision )
( Part 18 ) : 1979 Part 18 Marking and mode
of debvery ( second revision )
Plain washers (first revision )
2016 : 1967
Parrellel keys and keyways
2048 : 1983
( second revision )
2266 : 1977
Steel wire ropes for general
engineering purposes ( second

Part 4 Hexagon
thin nuts
( chamfered ) ( size range
( second
Ml.6 to M36 )
revision )

( Part 5 j : 1985

Part 5 Hexagon
thin nuts
( unchamfered ) ( size range
( second
Ml.6 to MlO)

revision )

revision )

1367
( Part 1 ) : 1980

( Part 3 ) : 1979

( Part 5 ) : 1980

( Part 6 ) : 1980

( Part 7 ) : 1980

2292 * 1974

Tangential keys and keyways

( second revision )
Taper
keys and keyways

2293 : 1974

Gib-head

2291 : 1981

Technical supply conditions

for threaded steel fasteners :
and
Part 1 Introduction
general information
( second
revision )

( Part 2 ) : 1979

Title

( Part 9 ) : 1979.

revision )

( Part 4 ) : 1985

Part 2 Product
grades and
tolerances ( secqnd revision )
Part 3 Mechanical properties
and test methods
for bolts,
screws and studs with full
Ioadability
( second revision )
Part 5 Mechanica
properties
and test methods
for set
screws and similar threaded
fasteners
not under tensile
stresses ( second revision )
Part 6 Mechanical properties
and test methods
for nuts
with specified
proof Ioads
( second revision )
Part 7 Mechanical properties
and test metho.ds for nuts
without specified proof loads
( second revision )

2294 : 1986
2327 : 1963

3177 : 1977

3665 : 1966
4009
( Part 1 ) : 1981
(Part

2) : 1981

4672 : 1982
11

(first

(first

revision )

keys

revision )

and keyways

Woodruff keys and keyways

( second revision )
Dimensions for straight sided
splines for general engineering use
Code of practice for overhead
travelling cranes and gantry
cranes other than stee1 works
cranes ( jirst revision )
Dimensions
for
involute
sided splines
Grease nipples :
Part 1 Button head grease
nipples ( jirst revision )
Part 2 Conical head grease
nipples (first revision )
Grease cups (Jirst revision )

IS 13082 ( Part0 : 1991

IS No.

4673 : 1968
5019 : 1968
5372 : 1975
5374 : 1975
5548 : 1970
5664 : 1984
6166 : 1971
6167 : 1971

Tiile
Wick feed lubricators
Lubricating plugs
Taper washers for channels
( ISMC ) (first revision )
Taper washers for I-beams
( ISMB ) (first revision )
Lubricating
nipple adaptors
Lubricating connectors (first
revision )

Thin taper keys and keyways

Thin
parallel
keys
and
keyways

IS No.

7745 : 1975
8593

( Part 1 ) : 1977
( Part 2 ) : 1988
(Part 3 ) : 1984
13148 : 1991

12

Title

Dimensions
of lubrication
holes, grooves and bore relief
Recommendations
for
centralised
lubrication
as
applied to plant and machinery.
Part 1 Oil lubrication
Part 2 Grease lubrication
system
Part 3 Aerosol lubrication
Bulk handling
equipmentmobile continuous
type Rules for design of structures

Standard

Mark

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Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark
on products covered by an Indian Standard conveys the assurance that they have been
produced to comply with the requirements of that standard under a well defined system
of inspection, testing and quality control which is devised and supervised by BIS and
Standard marked products are also continuously checked by
operated by the producer.
Details of conditions under
BIS for conformity to that standard as a further safeguard.
which a licence for the use of the Standard Mark may be granted to manufacturers
or
producers may be obtained from the Bureau of Indian Standards.

Bureau of Indian Standards

BIS is a statutory
institution
established under the Bureau of Indian Standards Act, 1986 to
promote harmonious
development
of the activities of standardization,
marking and quality
certification of goods and attending to connected matters in the country.
.
Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced
in any form without the prior permission in writing of BE. This does not preclude the free use,
in the course of implementing the standard, of necessary details, such as symbols and sizes, type
Director
Enquiries
relating
to copyright
be addressed
to the
or grade designations.
[Publications ), BIS.
Revision

of Indian Standards

if
Indian Standards are reviewed periodically and revised, when necessary and amendments,
any, are issued from time to time. Users of Indian Standards should ascertain that they are in
may be
possession of the latest amendments or edition. Comments on this Indian Standard
sent to BIS giving the following reference:
Dot : No HMD 07 ( 5226 )

Amendments

lssued Since Publication

Date of Issue

Amend No.

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Headquarters

Text Affected

STANDARDS

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