It is important to consider roof work, when it comes to
controlling the risk of falls of persons or objects. Careful consideration
should be given to suitable protection of works that are demolishing roofs
using mechanical means to remove roofing from work platforms below the roof.
For example, roof trusses should be removed by using safe temporary work
platforms to ensure that the removal of these trusses does not cause wall
instability.
Things you should consider prior to commencing roof demolition or
dismantling include fall hazards, structural stability, condition and strength
of the roofing materials and the identification of fragile roofing. Check DemolitionMelbourne for more information.
Also, crane access, safe worker access and egress fall protection
requirements should be checked. Fall protection requirements that have issues
like perimeter protection, the availability and strength of anchor points for
static lines, inertia reels and lanyards.
Similarly, the suitability of roof structures for safety nets to
secure people and rescuing people. You should also check the condition of the
roof mesh or safety mesh.
Finally, you should check the methods of raising and lowering
equipment and materials. The assessment of manual handling problems, electrical
safety which includes power lines in the vicinity and lastly training needs or
worker competency.
Fragile roof
The roof should be inspected to identify that it is structurally
adequate to work on. Whether it is adequate to work on or the brittle material
or if the roof has a fragile aspect to it.
Fragile or brittle roofing includes those that are made of
asbestos cement, cellulose cement, glass panels, fibreglass, acrylic or similar
synthetic moulded or fabricated material used to sheath the roof or contained
in the roof.
In case asbestos cement roofing is involved, the work should be
done based on asbestos related requirements of the WHS Regulations.
When it comes to a fragile roof you should inspect the roof to
check the extent of the fragile material, the existence of a safety mesh, its
fixings and structural soundness of the roof material, complete the work from a
temporary work platform and provide temporary walkways as a means of access to
egress from any work area on the roof where permanent walkways are not
provided. You should ensure that secure and fix cleats are made on the high
pitch roofs’ walkways. There should be temporary roof ladders for steep roofs
and provide other fall protection, if necessary.
Roof access
Those that are employed to undertake the business of roof
demolition should ensure the responsibility that access from the ground to the
actual work area is safe and not hazardous to health. The access arrangements
should include scaffolding, temporary work platforms, ladders, and personnel
hoists.
Purlin Trolleys
These Purlin trolleys are plant designed to travel to the top of
the purlins. These purlins are horizontal beams that run the length of the roof
and can be used to support material and workers on the roof. They are otherwise
used in the removal of roof coverings. These purlin trolleys are provided with
holding brakes and devices to prevent their accidental dislodgment from
purlins. Where it is needed, the roof workers will be supported with trolleys
with safety harness anchorage points.
Before the Purlin Trolley is placed on the roof structure, a
structural engineers should ensure that the roof structure is just right for
the trolley and the operational loads that is designed to carry. It is designed
and constructed to withstand loads placed on it and purpose of safe movement of
materials and persons all across the surface of roof.
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