Roof Truss Wall Plate Detail

Trussed rafter roofs and traditional cut roofs should be supported on timber wall plates.

Roof truss wall plate detail.

A truss frame consists of a roof truss and a floor truss joined by exterior wall studs. However anchor bolt spacing must be reduced 24 in. To fix the joists and rafters down on to the wall plates they should be toe or skew nailed to the top plate like below. 4 storage trusses should be stored in a stable position to prevent toppling and or shifting.

As with rafter style roofs toenailing is one of the most common ways of attaching a truss style roof to a wall plate. If the truss bundle is to be stored for more. Engineered roof trusses wi overhang roof apron gutter downspout system cont 2x8 rough fascia. 610 mm maximum because the top plate is loaded in its weak direction.

Metal plate connected wood trusses hib 91 by permission of truss plate institute inc. Toenail a truss into the top of the wall plate by nailing through the sides of the bottom chord at a 30 degree angle. I joist construction details performance rated i joists in floor and roof framing truss. If trusses are stored horizontally the blocking should be eight to ten foot centers to prevent lateral bending.

Plate a horizontal wood framing member typically the top and bottom 2x4 members of a stud wall and the 2x6 sill plate bolted to a concrete wall for floor structural attachment. End walls may be truss framed with field assembled stud infill prefabricated in. As an alternate to the roof truss anchor a bolted top plate may be used for the roof to wall connection see figure 5. Wall plates should generally be in lengths of not less than 3m but shorter lengths should extend over at least 3 joists rafters or trusses.

Set out the ceiling joists onto the wall plates the ceiling joists are installed before the rafters as they will stop the roof spreading and also give something for you to lay planks across to stand on when building the roof. The wide variety of possible roof and floor truss designs and combinations is illustrated by figure 1. Wall plates and the roof structure shall be bedded and fixed to distribute and transmit loads and to prevent uplift. 1k 2x plate flush with inside face of wall or beam.

Joist attachment per detail 1b load bearing wall above shall align vertically with the wall below.