Roof Truss Bottom Chord Splice

The most common form by far is the fink illustrated below.

Roof truss bottom chord splice.

A bottom chord can be multiple pieces of lumber secured by a metal plate known as a splice either at a joint or mid panel. The joint configurations were 2x4 lumber with 20 gauge truss plates 2x6 lumber with 20 gauge truss plates and 2x6 lumber with 16 gauge truss plates. A triangle is the simplest form of a truss and the bottom chord is the base piece. The stability of this shape supported by the bottom chord is the reason for the.

Splices are located at points of low stress usually at about a fifth of the bay length middle bay bottom chord upper bay on the top chord. The horizontal beam of the triangle of a bottom chord is used in this simple triangle truss construction. The bottom chord is intersected by the top chord and web members at various points throughout the truss creating a joint secured by metal connector plates. Span the overall distance between adjacent interior supports or to the outside of supports when at the end of a truss.

Typical triangular trusses parts of a truss panel length peak continuous la teral brace 12 slope pitch tru s pl te top chord heel bottom chord bearing point splice panel point w edg block span out to out of bearings cantilever overhang bottom chord length web double cantilever common trusses their spans king post span up to 16 queen. Most trusses will require splices in the bottom chord and many in the top chord as well. See detail above splice point top bottom. Several common wood truss splice joint configurations were tested at varying levels of combined tension and bending loading.

Net section strength of bottom chord splice joints of mpc wood trusses.