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. Maybe you are going to access the roof via a fixed roof access ladder or from a scissor lift. The base plate level and the center line of the truss column shall be marked based on reference datum and coordinate points given by main contractor surveyor.
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