Wall Brace Scaffold Trestle Installation and Awareness Guide

The Wall Brace Scaffold Trestle is a patented wall alignment system. It is an integral part of the installation of the ZEGO wall system

Wall Brace Scaffold Trestles are positioned

In the corners

100mm either side of door and window openings

and at no more than 1800mm centre to centre ( as this is the legal span for scaffold planks )

Adjusted plumb

Tie wall to Wall Brace Scaffold Trestle every 2 courses

Bolt each Trestle brace to the concrete slab or footing using bolts supplied by ZEGO

4 x bolts per brace

Correct drill bit 8mm

Minimum embedment 40mm into good slab or footing

Do not over tighten bolts

Each bolt 40mm embedment has a working stress design of 3.5kN ( 350kg ) in 15MPa concrete with a limit state design of 6.3kN ( 630kg ). 4.7kN in 32MPa concrete and 5.2kN in 40MPa concrete

IE a pair of bolts with load applied laterally at 2m high has a leverage with base plate pivot point to centre line of bolt of 105mm =19.0476. Therefore a limit load of 12.6kN or 1.26 Tonne divided by 19.0476 =0.6615kN or 66.15kg at 1m above ground 1.323kN or 132.3kg in 15MPA concrete and this loading increases as the concrete continues to cure.

A handrail test is to 100kg and this would be the most likely impact on a trestle

NOTE: A standard free standing Trestle frame only requires 30-35kg of horizontal loading to overturn and both require much more if vertically loaded

NOTE: Never leave unbolted scaffold frames free standing.

Always lay down horizontal when not in use.

Concrete strength during the curing process of the slab and footings

15 MPa initial minimum strength when the scaffolding is used as a platform

Concrete strength after placement will be 40% at 3 days

50% at 4 days

60% at 7 days

80% at 14 days

100% at 28 days

NOTE: The % is of the ordered MPa concrete strength

Higher strength concrete may be used to gain high early strength if required ( pleas confirm with your project engineer )

Planks

Minimum 2 x scaffold plank wide

Planks must be in good condition ( no splits, cracks, knots, bents etc )

Overhang of plank on Scaffold Trestle between 150-250mm

Overlap planks over Scaffold Trestle

Maximum deflection of scaffold plank 25mm

Handrails

Install 100 x 50 timber handrail

Lap only over scaffold handrail posts

Handrail must be in good condition ( no splits, cracks, knots, bents etc )

NOTE: Hand rail can be installed as Top Plate as scaffolding is dismantled

Access ladder

Install ladder access and secure to scaffold plank with two ( 2 ) 50mm roofing screws

Dismantling of Scaffolding

Remove in reverse to above

Leave one tie to wall

Unbolt all floor bolts

Remove last tie and carry one person each end to steel stillage and stack end to end

Twenty five ( 25 ) per stillage with ladder on top

Stack stillage in area accessible by crane truck to avoid double handing.

Clear walkway of trip hazards

NOTE: Never leave unbolted scaffold trestles free standing. Always lay down horizontal when not in use.

Additional NOTES

Prevent inadvertent impact by persons and plant – eg by using “NO-GO Zones” and or dedicated clear travel paths

Protect starter bars with protective caps

Monitor weather conditions. Do not access work platform in high wind conditions

Maximum 225kg per scaffold bay

Control the movements of multiple persons, eg do not walk around others on 2-plank platforms

Under no circumstances should anyone climb the brace trestles or frames

Handrails must be installed if potential fall exceeds 2m eg beside lift shafts, stairwells, balconies, floor penetrations etc

When drilling or bolting wear PPE eg earmuffs, glasses or goggles and no loose clothing or hair

Look up and stay clear of power cables

When using power cables hang safely on cable hangers on brace trestle to keep walkways clear

Do not run on platform

Inspect scaffold and platform prior to accessing each time to ensure planks and handrails are lapped safely and all bolts are installed into feet of the scaffold brace

Always assess risk on your particular project.

Risk Management and Consultation

Before working on frame trestles, follow the risk management process.

The process does not need to be complicated. In most cases you can simply:

Look for hazards

Decide who might be harmed and how – ie Is there a risk?

If a risk exists, consider ways of doing the task more safely.

Take action to eliminate the risk; or if it is not reasonably practicable to do so, then to control the risk.

Your workers’ experience and knowledge can help you identify and control hazards.
Therefore, you need to consult with them directly.

Plumb up the face of the brace by turning the adjustor at the rear of the Wall Brace Scaffold Trestle

Once the wall is built and before foaming off and concreting, pull a string line along the face of the wall elevation and fine tune the Wall Brace Scaffold Trestle as required Click here for correlation between labour cost vs Wall Brace Scaffold Trestle rental cost

ZEGO Contact

ZEGO Pty Limited

Head Office & Tenders -- Ph (02) 9651 2277
GPO Box 4774
Sydney NSW 2001
Australia
quotes@zego.com.au
www.zego.com.au
Ph : 1300 13 9346
Fax : (02) 9651 2477

Get in Touch

To complete address details,Click here
To hide address details,Click here