Careful erection, fixing and strapping is essential if a trussed rafter roof is to provide a sound platform for roof coverings and contribute effectively to the
stability of the roof and gable ends.
Strapping gables to ceiling ties
Ceiling ti straps may be excluded from the specification for roof pitches below 20 degrees. Check with the building designer. If they are needed, fix as shown for rafter straps, but attach to the upper edge of the ceiling tie. Use a twisted strap to engage a vertical joint if horizontal courses do not coincide.
Strapping at the separating wall
In addition to the normal strapping to walls, additional straps may have been specified to provide longitudinal bracing between roofs, these should be run over the top of the separating wall and fixed to the specified number of trusses on each side. Include noggings and packing to transmit loads properly.