Gable Roof Truss Bracing

Lifting trusses higher than one story may require a crane.

Gable roof truss bracing.

Turn the truss upside down and place on corner on the roof surface. In the attic go to the gable end and examine the area where the triangular wall meets the rectangular wall below. The webs are studs oriented vertically and usually spaced at 12 16 or 24 in. Then nail the brace securely to the other trusses.

To assist the building designer in determining the bracing requirements to transfer lateral loads from the gable end frame into the roof and or ceiling diaphragm many truss designers provide standard design tables and details based on typical design assumptions used by building designers figure 12. Bracing for larger roofs. The number of trusses clustered depends on building span and truss spacing. Bracing for roofs less than 6 6m wide on detached or staggered stepped buildings.

Use a t brace to support the truss vertically. The gable end frame is designed to transfer vertical loads from the roof to the continuous bearing wall below. When several trusses are in place nail the end of the brace over the second gable end truss. Install 2x4s at a 45 degree angle.

It is best to brace the inside of the trusses before handling them. Manufactured gable ends are actually frames even though they are often referred to as trusses. Bracing for roofs that are approximately square. Gable end walls need to be well connected to the wall below and to the roof structure or ceiling diaphragm.

Diagonal rafter bracing should be approximately 45 to the rafters on plan. Using the same 24 inch on center measurements that you marked on the wall plates earlier mark each truss for bracing. There are several methods for making these types of connections. The remainder of the trusses should be braced with 1x4s.

Wind bracing should be placed at 30 60 angles. Applicable to all trussed rafter roofs unless rigid sarking such as timber boarding or plywood is used. The images below show these critical components and their recommended placement. Gable end walls and the roof sheathing at the gable end can take a tremendous beating during a hurricane and if not properly attached and braced they fail.

Slide the rest of the truss up using a 2x4 as a ramp if necessary.