Roof Truss Rigid Ceiling Bracing

I just received the engineering for my truss system and see that where i want to fur the 5 in 12 scissor trusses down with a 2x6 so that i can insulate the attic out to the ext.

Roof truss rigid ceiling bracing.

Nail braces vertically every 4 feet along the top and bottom of a gable truss. The plasterboard should be a minimum thickness of 9 5mm for up to 450mm truss centres or 12 5mm for up to 600mm truss centres. Bracing is allowed in lieu of rigid ceiling elsewhere in the house. This is where a high pitched roof is necessary.

Lifting trusses higher than one story may require. Where a ceiling is less rigid than plasterboard or omitted completely extra bracing may be required at ceiling level. Diagonal and longitudinal bracing should be provided at rafter level this may be omitted where rigid sarking boards are used e g. Chipboard plywood or osb which are fixed to each trussed rafter with 3mm x 50mm galvanised round wire nails at 200mm spacing.

This brace needs to be far enough up the trusses to provide headroom and still provide support for the trusses. 2 by 4 inch pieces of lumber are attached from each end of this brace to each ceiling joist perpendicular to the ceiling joist forming a wall and supporting each truss. F all bracing members should be a minimum size of 22mm by 97mm and free from. Be aware that the irc provisions for trusses are much more extensive than what s been seen in the codes in the past.

They are so common in construction today as to be almost invisible. Use a t brace to support the truss vertically. Walls the notes say this truss design requires that a minimum of gypsum sheetrock be. Slide the rest of the truss up using a 2x4 as a ramp if necessary.

Install 2x4s at a 45 degree angle.