Splicing Roof Trusses

These three planes are the top chord plane the bottom chord plane and the web member plane.

Splicing roof trusses. Then a splice is in order. Scab additional timber connected to a truss to effect a splice extension or general reinforcement. This issue is dedicated to the importance. Rafter plates are almost always spliced due to the length of most structures.

In the case of large roof trusses which cannot be transported whole welded sub assemblies are delivered to site and are either bolted or welded together on site. How to splice a roof rafter plate. In light roof trusses entirely bolted connections are less favoured than welded connections due to the requirement for gusset plates and their increased fabrication costs. Trusses have rafters tied together with other structural elements and are installed as a single unit while rafters are installed separately.

Shop drawingdetailed drawings of a roof truss or roof framing showing critical. It is stamped into the wood at the factory with a hydrolic press. But sometimes a roof is too long for a single ridge board. Rafter plates are load bearing beams that support either a single rafter or a truss.

Truss brace splicing methods he building component safety information bcsi booklet jointly produced by wtca and the truss plate institute recognizes three planes requiring restraint in a roof truss. Trussed rafters are defined as triangulated timber frameworks positioned at close centres generally 600mm to form roof structures. The idea of trussed rafters arrived in this country from the states during the 1960 s and quickly became the standard method of constructing roof structures in domestic construction. A gang nail is basically a thin piece of metal stamped out so that many metal tangs stick out into the wood about a 1 2 or so.

The truss companies use a gang nail to splice wood together pictured at left.