Roof Truss Rigid Ceiling Bracing

The code specifies specific information to be provided on the truss drawings requires that bracing be.

Roof truss rigid ceiling bracing.

Where a ceiling is less rigid than plasterboard or omitted completely extra bracing may be required at ceiling level. Use a t brace to support the truss vertically. Nail braces vertically every 4 feet along the top and bottom of a gable truss. Bracing is allowed in lieu of rigid ceiling elsewhere in the house.

Diagonal and longitudinal bracing should be provided at rafter level this may be omitted where rigid sarking boards are used e g. Now let s talk about metal plate connected roof trusses. Be aware that the irc provisions for trusses are much more extensive than what s been seen in the codes in the past. Walls the notes say this truss design requires that a minimum of gypsum sheetrock be.

This is where a high pitched roof is necessary. 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. Lifting trusses higher than one story may require. They are so common in construction today as to be almost invisible.

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. Install 2x4s at a 45 degree angle. Turn the truss upside down and place on corner on the roof surface. Slide the rest of the truss up using a 2x4 as a ramp if necessary.

Chipboard plywood or osb which are fixed to each trussed rafter with 3mm x 50mm galvanised round wire nails at 200mm spacing.