PART XI SCAFFOLDS, STAGES AND WORK PLATFORMS — Job built ladders
149
Where a portable wooden ladder is constructed at the job site,
149(a)
the side rails
149(i)
shall be of 38 millimetres by 89 millimetres nominal dimensions for lengths up to 5 metres, and 38 millimetres by 140 millimetres nominal dimensions for lengths from 5 metres to 7.3 metres, and (ii) shall not be notched, dapped, tapered or spliced, and the distance between the inner faces of the side rails shall not be less than 38 centimetres or more than 50 centimetres; 19 millimetres by 64 millimetres for ladder lengths up to 5 metres, (ii) 19 millimetres by 89 millimetres for ladder lengths from 5 metres to 7.3 metres, (iii) spaced at 30 centimetres centres, and (iv) nailed directly onto the smaller surfaces of the side rails, using three 57 millimetres wire nails on each end of the 89 millimetre cleats, and two similar nails on each end of the 64 millimetre cleats;
149(b)
cleats shall be
149(c)
the spaces on the side rails between the cleats shall be filled with close fitting and well secured filler pieces that are the same thickness as the cleats; and
149(d)
a double cleat ladder shall have 3 rails evenly spaced, and be 107 centimetres to 127 centimetres wide and have continuous cleats which extend the full width of the ladder.
Not legal advice. Verify the cited article against the signed agreement.