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Thursday, 30 July 2015

Mobile Tower Scaffolds - HAZARD / PRECAUTONS

Mobile scaffolds may be constructed using tube and coupler scaffold, fabricated frame scaffold or modular type scaffold. As with any supported scaffold, however, it can be configured in many different ways. This tip sheet highlights some of the key items to keep in mind when inspecting, erecting, maintaining, and using mobile scaffold.

Hazard
Precautions
Collapse.
Erection by Competent persons. Pre – use inspections to ensure properly erected
Overturning (general)
Base plates used in preference to wheels where there is no need to move.
Positioned on firm level ground.
Checked to ensure vertical before use.
If wheeled then wheels locked before use.
Height not to exceed minimum base dimension by x3 for external use x3.5 for internal use.
Overturning (additional risk factors).
Lower height to base ratios.
Use of Outriggers to broaden base.
Sheeting.
Trying in to adjacent structures.
Overloading .
Water jetting /grit blasting .
Access via a fitted ladder inclined within the tower providing a route to the work platform through a lockable ‘trap door’
Supporting hoists/waste chutes
Procedures to ensure storage of materials are kept to a minimum.
Climbing the tower/use of external ladders.

Moving a wheeled tower
Procedures to ensure towers are not moved when there are people or materials on the upper platforms or in very windy conditions.
People falling.
Fully boarded platform with suitable edge protection comprising guardrail , Toe boards and intermediate rail or brick – guard
Falling Objects .
Barriers erected at ground level to prevent people from walking into the tower or work area.
Wearing of construction safety helmets for ground staff.
Overhead obstructions / power lines.
Site inspection before initial erection and before any moving of an erected tower on site.

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