In these situations roof truss erection meets the definition of hrcw within part 5 1 of the occupational health and safety regulations 2017 ohs regulations. Erect work platform inside of perimeter truss bearing walls two planks wide min 450mm and 1200mm below top plate height may be adjusted to provide a suitable working position for the truss plate connection and allow comfortable ducking under bottom chord of trusses 2. Trusses form the roof line on buildings and provide support for the lumber that holds shingles or other form of roof cover.
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