Fixing Plasterboard To Roof Trusses

We have a garage that has a trussed roof that i want to install a plasterboard ceiling.

Fixing plasterboard to roof trusses.

He wants to include fixing the ceiling plasterboard in the scope of the job. Factory built roof trusses generally arrive at the job near their maximum allowed moisture content and drywall usually gets hung before the trusses dry out to achieve an equilibrium moisture content with the location. To allow edges of the plasterboard to be supported i need to add noggins between the roof trusses trusses are at 500mm spacing. When trusses were installed at 600mm centres it became common practice to fix plasterboard ceilings directly to the truss bottom chords.

Suggested building the stud wall up to a few mm below either the truss joists or the in place ceiling plasterboard and then using expanding foam to anchor the stud wall to the roof. 9 step 1 step 2 step 3 fix lower bracing as per the roof detail. On each side of the roof. Continue to spread the trusses and fix by repeating the process until the roof is fully spread.

As the truss dries the bottom chords can shrink and pull away from the top plate of interior non load bearing walls. To allow high level bracing to be fixed without injury install safe and secure temporary. A totally original design concept that transforms the method of hanging heavy plasterboard panels to ceiling joists.