GS-A-99

ANNEX A-a

LIFTING OPERATIONS

1 General

1.1 The Contractor shall be responsible for ensuring that all lifting operations
carried out on site and any rental cranes brought onto site are done so with
minimal risk of injury to persons including members of the public or damage to
property.

1.2 Effective control must be exercised at all stages of a lifting operation through
the deployment of a competent lifting supervisor, a qualified signalman, a
registered crane operator and sufficiently trained riggers. Contractor may
combine the role of rigger and signalman for Routine Lifting operations (refer to
Code of Practice on Safe Lifting Operations in the Workplaces for definition),
subjected to conduct of a detailed risk assessment and provision of adequate
control measures before allowing this work arrangement.

1.3 All lifting machines, lifting appliances and lifting gears used on site must be
suitable for the task, used within their rated safe load capacity and must be in
good condition.

1.4 The Contractor is to submit a weekly list to the Engineer of all cranes
permanently deployed on site detailing their ownership, make, identification
number, maximum Safe Working Load (SWL) and the corresponding radius,
lifting Machine (LM) certificate number and date of expiry.

1.5 The Contractor shall ensure that any lorry loader on Site is only used for the
delivery to Site and collection / removal from Site of materials within its rated
lifting capacity, and not for lowering any materials into a trench or excavation,
or for raising any materials to a higher level. However, transporting materials or
plant / machinery around Site may be permitted if the lorry loader has been
tested on the site by an Authorised Examiner.

Contractor may appeal to the Engineer for use of lorry loader to support other
construction activities provided:

a) use of mobile crane is not possible due to space constraints;

b) detailed risk assessment has been conducted and adequate control

measures are implemented for this work arrangement; and

c) lorry loader is equipped with a manufacturer approved stability control

system compliant with EN12999:2011 or equivalent internationally
recognised Standards

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d) the stability control system should include the Rated Capacity Limiter.
This monitors the position of the stabilisers and limits the lifting capacity

e) the stability control system should calculate in real time the permissible
working range for any slewing angle of the boom system and for any
stabiliser situation. It should stop the crane at non-working range to
prevent any overloading or toppling

1.6 All lorry loaders entering into the Site shall have an interlocking system installed
to prevent a lorry loader from moving off before its articulated boom is fully

1.7 The boom of any lorry loader shall not be used for holding down materials or
equipment and it

1.8 Loading / Unloading operations involving lorry loader shall take place over the
side of the main body and not in an arc over either the front or rear of the
chassis, in accordance with safe working practices.
1.9 No excavator shall be used as a lifting machine on site unless it is originally
designed and manufactured to also function as a lifting machine and comply
with all MOM stipulated requirements. For excavators used as LMs, the
operator has to attend and complete the additional training on use of excavator
as a LM.

1.10 The Contractor shall ensure that a Permit to Lift system is operated to evaluate
all routine planned lifting operations generically and all heavy or one-off lifting
operations individually. This latter category of lifting operations includes the
raising / lowering of items of plant in excavations. Lifting plans shall be
submitted to the Engineer for acceptance in advance of any heavy or one-off
lifting operations.

1.11 Lifting Supervisors and Riggers shall don brown and red safety helmets
respectively. Riggers and signalmen shall wear reflective vest with identification
tags.

1.12 The crane operator is to ensure that the outriggers are fully extended, and any
adjustments made to the jacks to level the crane before the lifting operation
commences. All lifting machine with outriggers, including lorry loader with
articulating arm, shall have steel plates of minimum dimension 1m by 1m by
25mm placed under all the outriggers deployed for a lifting operation unless
that crane is entirely sited on hard standing such as a reinforced concrete
surface, with no void underneath. Pieces of timber are not to be used.

1.13 Lifting of machineries and / or equipment shall be done as per manufacturer's

recommendations.

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1.14 All works using lorry loaders for lifting shall have their outriggers fully extended.
For lifting works that require the lorry loader to extend the outriggers partially
due to site constraints (eg. working along the public roads), it shall have a
manufacturer approved Stability Control System, compliant with EN12999:2011
or equivalent internationally recognised Standards, that is able to detect the
limits of the safe working load and provide automatic cut-off upon detection of
overloading, based on the different configurations of outriggers extension.

2 Lifting Machinery

2.1 This term includes, but is not limited to, lattice jibbed crawler mounted cranes,
hydraulic variable jib mobile cranes, rail mounted gantry cranes, mobile and
fixed tower cranes.

2.2 The Contractor shall ensure that before any lifting machine, including lorry
loaders with articulating arm used for delivery to site, is brought into use on site
the labels on all controls, the details on the safe working load radius chart and
any other safety related notices in the cab or on the body of the lifting machine
shall be written in English as well as in a language comprehensible to the crane
operator.

2.3 Before being taken into use on site for the first time, in the case of a lifting
machine which undergoes assembly on site, or following the substantial
alteration of any type of lifting machine such as the jacking up of a tower crane,
the lifting machine must be load tested by an Authorised Examiner and
subsequently examined every six months whether it is owned by the Contractor,
one of his Subcontractors or by a crane rental company. The Contractor shall
make arrangements for the examination by an Authorised Examiner before the
expiry date so that there is continuity of cover of LM certificate.

2.4 The Contractor shall ensure that no lifting operation shall be carried out on site
using the auxiliary hook of a mobile crane unless the SWL of this is shown on
the LM Certificate in addition to that of the main hook block, and that this SWL
is not exceeded during operation.

2.5 The Contractor shall ensure that both the Lifting Supervisor and the crane
operator are able to understand the working load chart.

2.6 No lifting machine over 15 years old (based on date of manufacture) shall be
operated on any LTA Site.

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2.7 Cranes fitted with a Load Radius Indicator (LRI) shall sound an audible alarm
in the crane cab if its SWL is exceeded on either the main or the auxiliary hook.
A second alarm connected to the LRI, shall be fitted external to the cab and
shall emit a signal of a sufficient volume to make it audible above the ambient
site noise levels during working hours. Visual warning shall also be provided
externally to indicate safe working range and overload conditions.

2.8 LRI shall be fitted with a limiting device, which disables the crane from
continuing with any lifting operation under overload conditions. Once disabled,
the device should only permit the crane to return to the safe working range. The
device shall be tamper proof, with no over-ride to disable it, and shall be
maintained in good working order. In instances where there is a bypass switch
for the LRI, it shall be secured by a lock and the key kept with the lifting
supervisor.

2.9 The LRI shall be calibrated every six (6)monthly by an approved agency and
verified by the Authorised Examiner during his six (6)monthly inspections.
Records of LRI calibration shall be submitted to the Engineer. If there is any
doubt as to the accuracy of the LRI the machine shall be taken out of use until
the calibration is carried out to the satisfaction of the Engineer.

2.10 If the crane is down rated by the Authorised Examiner during his six (6) monthly
inspections then the LRI shall also be calibrated and a new capacity chart
should be drawn up and posted in the crane cab. The Authorised Examiner
shall highlight the above details on the LM certificate.

2.11 A lifting machine shall not be used for any unsafe operation that may affect its
overall integrity or stability.

2.12 The Contractor shall ensure that lifting machine capable of travelling / tracking
and slewing, such as a mobile crane, shall be operated in such a manner that
there is always an unobstructed passageway in excess of 600mm between it
and any other fixture or machinery.

2.13 To address the risk of trapping or crushing of persons working at or near the
tracks of a gantry crane, an unobstructed passageway of at least 750mm in
width on each side of each rail, shall be maintained parallel to and extending
the entire length of the tracks upon which any gantry crane is operated. This
requirement is clearly stated in clause 15.3.1 of SS497:2011 and clause
2.11.11 of SS567:2011. Authorised Examiners are reminded to check the
compliance of the above requirement during the commissioning of the gantry
crane as well as the subsequent periodic statutory examinations.

2.14 All lifting machines that operate on LTA sites shall be installed with a rear view
camera that enables the operator to have a clear view of the back of the
machine.

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2.15 The use of fly jib on any lifting machines shall be subjected to the approval of
the Engineer.

2.16
be prohibited.

2.17 The Contractor shall engage a specialist contractor with a wire rope inspection
device for checking of wire ropes of all service cranes and diaphragm wall
machines. The required inspection frequency for the wire ropes shall be based
recommendation.

2.18 The Contractor shall ensure that weatherproof camera(s) with real-time
recording capabilities, enabled optical and digital zoom and linked to monitors

effectively assist the crane operator. There shall also capabilities to enable the
crane operator to see people and load in dark places such as under shade or
night time.

3 Crane Data Logger

3.1 All cranes without manufacturer fitted data loggers operating on site shall be
retrofitted with data loggers approved by the Engineer.

3.2 All cranes with either manufacturer-fitted or retrofitted data loggers shall have
their data loggers enabled when operating on sites.

3.3 The data recorded by the data loggers shall be monitored, downloaded and
interpreted by the Contractor on a monthly basis and submit electronic copy (e-
copy to the Engineer as part of the SHE monthly report. The Engineer may at
his discretion require the Contractor to download the data when he deems
necessary.

3.4

3.5
(a)

(b)
(c)
(d)
(e)
(f)
(g)

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3.6

(a)

(b)

(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)

(k)
(l)
(m)

3.7 The data logger shall have real-time alert function and shall be monitored by
-

Project Manager.

4 Mobilisation and Demobilisation

4.1 The Contractor shall carry out a risk assessment and establish a Safe Work
Procedure for the mobilisation and demobilisation process that is specific to the
model of the lifting machine being used on Site. The risk assessment and SWP
shall take into account factors such as the limitations of the lifting machinery as

weather conditions.

4.2 The Contractor shall ensure that the ramps used for the mobilisation and
demobilisation of heavy machinery comply with the requirements stated in the

4.3 acturer on the

appropriate and safe method for mobilisation and demobilisation should critical
factors such as angle of slope, direction of travel etc. that may limit the lifting

demobilisation method differs from the operation manual.

4.4 The Contractor, as and when necessary, may fabricate a ramp that is PE
designed and it should be wide enough to accommodate the width of the

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5 Temporary Rental Cranes

5.1 At least 24 hours before any rental mobile / crawler mounted crane is brought
onto site the Contractor must submit to the Engineer:
(a) The lifting plan for the operation to be carried out.
(b) A copy of the current LM certificate for the crane.
(c) A copy of the crane operat
(d) The name of the Lifting Supervisor will be responsible for it, and
(e) A record of any repairs carried out since the last LM certificate was
issued.

5.2 The Contractor shall ensure that, as far as practicable, rental cranes entering
site are manned with the same operator, who shall undergo site induction
training before commencing operation. If for any reason the crane rental
company sends a substitute operator he shall also undergo site induction
training.

5.3 Before any crane is accepted onto site for use it must undergo a thorough
mechanical check by the Crane Maintenance Supervisor, and the findings
WSH Officer.

6 Erection of Cranes on Site

6.1 The Contractor shall engage only Approved Crane Contractors to install, alter,
repair or dismantle any parts of a mobile or tower crane which affects the lifting
capacity of that crane. A copy of the MOM approval letter shall be retained with
the crane erector doing the repair.

6.2 The minimum strength of the team who erects / dismantles any tower crane
must be one (1) approved crane erector and five (5) trained assistants, and for
a mobile crane is one (1) approved crane erector and two (2) assistants.

7 Lifting Gear (LG) / Lifting Appliance (LA)

7.1 The Contractor shall ensure that every LG / LA brought onto site, including that
accompanying rental cranes, lorry loaders, excavators, cement buckets, air
receivers, skips, welding sets etc. has a valid LG / LA certificate and clearly
marked with its SWL. All LG / LA shall be inspected by an Authorised Examiner
once every six months.

7.2 The Contractor shall ensure that LG / LA is not loaded beyond its SWL and this
includes multi leg chain slings being used at variable angles.

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7.3 The Contractor shall ensure that LG / LA is not used for any purpose other than
the raising or lowering of a load. If an excluded activity takes place, such as the
use of a lifting chain for towing an item of plant / machinery, then the Contractor
shall ensure that this item of LG / LA is no longer used for any further lifting
operations.

7.4 If an item of lifting gear is inadvertently subjected to a force exceeding that of

which it is designed to experience when lifting an object at its SWL then the
Contractor shall ensure that it is taken out of use.

7.5 The Contractor shall implement an inspection programme to thoroughly check

all LG / LA by a Lifting Supervisor prior to its first use on site and thereafter on
a monthly basis. A monthly colour coding system shall be adopted. Defective
LG / LA shall be discarded immediately.

7.6 When not in use the Contractor shall ensure that all items of LG / LA are stored
in a rack sheltered from the weather and maintained regularly. Should any LG
/ LA be exposed to a corrosive material e.g. wet concrete, it must be washed
off afterwards and re-greased.

7.7 The Contractor shall ensure all the lifting lugs for any equipment used on site
shall be designed by a Professional Engineer (PE). Non-destructive Testing
(NDT) shall be conducted on lifting lugs on heavy equipment/machinery or on
any equipment/machinery as directed by the Engineer before use on site.

7.8 All wire rope lifting gears shall be installed with thimbles to protect the wire rope
from wea LG shall be allowed on site.

8 Lifting Supervisors (LS)

8.1 The Contractor shall ensure that a sufficient number of qualified LS are
employed on site, whether by himself or by his sub-contractors, to give
adequate cover for all lifting operations carried out both by day and by night
including loading / unloading. The LS may supervise and co-ordinate two
Routine Lifting operation when the operations are side by side and within close
proximity with no obstacle, blind spot or entrapment of point during
manoeuvring of the load or lifting equipment. In addition, when lifting operations
are carried out near public areas, the contractor shall station at least (1) one
additional worker to assist the signalman to manage flow of pedestrians.

8.2 The contractor shall install warning devices/ flags at least (2) two metres above
top of hoarding that are alongside roads, footpaths and adjacent structure.

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8.3 The LS shall supervise and co-ordinate all lifting operations under his/her
charge. The LS shall familiarise himself with the load chart of each crane for
which he is responsible and has identified himself to the operator of each such
crane as being the only individual whose instructions concerning any lifting
operation are to be followed. This includes the positioning of the crane prior to
the lift as well as the slinging of the load.

8.4 Before any lifting operation involving a mobile or crawler mounted crane is
carried out the LS must satisfy himself that the crane is positioned suitably close
to the load and its destination to ensure that the operation can be carried out at
the safest appropriate radius.

8.5 The LS shall ensure that the load is safely rigged, and a tag line is attached if
appropriate, before signalling to the crane operator to start the lift. The LS is
responsible for the load until it is safely resting at the intended destination either
by taking control of the operation himself for non-routine lifts or, for routine lifting
operations, by thoroughly briefing the crane operator, riggers and signalman on
the safe procedure to be followed.

8.6 The Contractor shall put measures in place to discipline any person other than
the dedicated LS, or one acting under his close supervision, who attempts to
take control of any lifting operation other than those of a routine nature where
a safe lifting procedure has already been established.

9 Crane Maintenance Supervisor

9.1 The Contractor shall appoint a full time Crane Maintenance Supervisor certified
competent by a MOM approved crane supplier company to attend to all the
mechanical aspects of operations involving lifting machines, lifting equipment
and lifting gear on site.

9.2 The Crane Maintenance Supervisor shall carry out periodic planned
maintenance on all lifting machines to ensure that they are in good working
order.

9.3 The Crane Maintenance Supervisor shall be responsible for ensuring that each
crane operator is competent to carry out the checks necessary before the crane
is taken into use on any day / shift, and shall carry out his own weekly thorough
check of all cranes on site.

10 Crane Operator

10.1 The Contractor shall engage only qualified crane operators with at least five (5)
years of experience in operating similar types of cranes with no record of crane
toppling / failure or barred from any site previously for a crane related incident.

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10.2 The crane operator shall enter the date, types of maintenance carried out and
any malfunction of the crane in a checklist or logbook. He shall not operate the

LS.

10.3 All cranes shall be checked by its operator at the start of any day / shift using a
checklist written in English and in a language comprehensible to the operator.
Copies of the checklist together with LM certificate, operator certificate, and
permits should be retained in the crane cabin for verification.

11 Lifting Engineer

11.1 To ensure that day to day lifting operations are monitored at an appropriate
level of management, the Contractor shall appoint a Lifting Engineer from his
staff, preferably his site engineer with a minimum of five (5) years site
experience to oversee the activities of the various lifting supervisors on site. All
issues concerning safety of any lifting operations shall be referred to this
appointed Lifting Engineer for a final decision.

The Contractor shall ensure the appointed Lifting Engineers had successfully

the Institution of Engineers Singapore (IES), or equivalent course approved by

the Engineer.

11.3 The Contractor shall ensure that a lifting plan is drawn up and agreed with his
appointed engineer responsible for lifting operations before any lifting operation
is started. The engineer shall verify that the LS, the crane operator, the
signalman and the riggers understand the part they have to play in ensuring
that it is carried out safely. The lifting plan shall be forwarded to the Engineer
for acceptance.

11.4 The Contractor shall ensure that weight of load is conspicuously marked on the
load/equipment.

11.5

11.6 The lifting engineer is responsible for checking that the proposed location of the
crane for the lifting operation is sufficiently compacted to bear safely the force
exerted by the crane, taking into consideration the proposed load to be lifted,
and any additional forces exerted by the crane slewing or derricking.

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11.7 The Contractor shall put in place a system for inspecting and upgrading the
route over which a crawler mounted / mobile crane is to transit when it is being
moved on site before any proposed lifting operation to ensure stability of the
crane whilst travelling. Inspections must be conducted at least once a week or
after inclement weather. The records of the inspections must be properly
documented. This procedure shall also be followed when it is proposed that a
crane transits carrying a load.

11.8 The Contra

the crane access routes will support the force exerted by each crane and any
load it may be carrying. The appointed engineer is to make an entry on a form
designed for that purpose, sign it and hand it to the operator to keep in his cab
before any crane is transited. Crane access checks shall be repeated after
inclement weather as appropriate.

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