form work safety

8/8/2019 Form Work Safety

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Form Work Safety

Its a little more than paper work

P bar Y Safety Consultants Alberta Canada


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Safety in falsework and formwork

Definition

Formwork is the section of the temporary works

used to give the required shape and support to

poured concrete



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Carry out as much work as possible at low level.

Fabricate column cages at low level

Support cage on adequately strength trestles at waistheight.

This prevents potential fall hazards and reduces the need

for steel fixers to repeatedly bend etc. causingmusculoskeletal problems.

The cage can then be lifted into position by a crane.

Temporary props may be required until the splices are tied

Fabrication & erection of reinforcement



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Scaffold with edge protection to both work face and outer edge must be provided,

where cages have to be built in-situ

Scaffold top 3 sides minimum with edge protection to

work and outer face

Note gap not to

be left excessive

so fixer has to

stretch.




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Three types of column shutters are in normal use.

Proprietary bespoke shutters

Proprietary systems

Traditional timber

Column Shuttering



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Sheet shutters with integral working platform andpropping systems.

Advantages:

quick to use

provide good quality concreting platform

purpose designed lifting points

reduce the potential for working of ladders

To maximise their use and be cost effective, thestandardisation of column sizes must take place at designstage.




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The shutter normally come in two halves, either

semicircular or two adjacent faces at right angles.

Once placed and temporarily propped, the two halves are

bolted together from a tower scaffold if space allows If space is not available, bolting up may take place of a

footed / tied ladder with the use of a secured harness.

The shutters are then re-plumbed and the top work

platform lifted into place.




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Pre-fabricate as much as practical at ground level to reducethe need to work at height.

As with the proprietary systems scaffolds should be usedfor access to join sections together.

Lifting of timber shutters has in the past caused majorinjuries where the lifting points have failed.

It is therefore essential that any lifting points are designedin and checked by a BLL temporary works engineer.

Traditional Timber shuttering



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Same principles apply for column construction

Reinforcement and shutters should be prefabricate onground and lifted into position where possible

Properly constructed scaffolds with safe access and doubleguardrail edge protection to work face must be providedwhen constructing insitu

Where proprietary shutter systems with in built concretingplatforms are used then stop ends must be provided andadequate protection must be provided to the work face,i.e. a secondary scaffold on the opposite side to theworking platform.

Wall Construction



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Workers must not work on top of walls. The top of walls must be 910mm abovethe work platform or edge protection must be provided to the outer side of the

wall.

Unacceptable



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A lifting plan must be in place for the lifting and reinforcementand shutters.

Use the lifting points provided when using proprietary systems

Each shutter should be examined immediately prior to lifting to

ensure lifting points are adequate sound and un-damaged.

Safe means of access for hooking and unhooking shutters mustbe implemented.

Where traditional form work is used, ensure that lifting points

are designed in and the design checked by a BLL temporaryworks engineer.

Tag lines should be used to control shutters during lifts, whichmust not take place in windy conditions.

Lifting Shutters (Walls and Columns)



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Establish a striking sequence, back propping requirementsetc.

Provide suitable work platform and protection against falls

Remove all loose material / fittings before dismantlingbegins

Move dismantled materials directly to storage areas

Projecting nails

Replace guardrails formed on falsework / formwork withothers fitted to concrete edge

All openings securely covered and guarded

Dismantling formwork



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Use correct slings and slinging techniques

DO NOT lift using the binding wire

Ensure a safe place of work for steel fixers

Create an exclusion zone around areas where rebar is beinghandled

Correct storage to prevent double handling, preventing

musculo-skeletal injuries, trapped fingers etc.

Rebar should be cut in an approved manner, operatives

wearing safety eyewear and gloves

Steel Fixing



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Steel Fixing



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Steel Fixing



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Disc cutters may only be used by trained and authorisedpersonnel

Cutting torches must NOT be used on rebar

Bar bending machines should be adequately fenced Where bar croppers are used, take precautions to ensure

that the cut off end of the bar does not fly off

All projecting steel should be capped or boxed over to

prevent injury

Steel Fixing



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If you have any questions,If you have any questions,

please ask your supervisorplease ask your supervisor


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