Roof Truss Bottom Chord Splice

Most trusses will require splices in the bottom chord and many in the top chord as well.

Roof truss bottom chord splice.

Spacing the centerline to centerline distance between trusses. Several common wood truss splice joint configurations were tested at varying levels of combined tension and bending loading. 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. It is utilized in a framed roof comprised of rafters and a ceiling joist.

See detail above splice point top bottom. Net section strength of bottom chord splice joints of mpc wood trusses. 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. 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 most common form by far is the fink illustrated below. 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. Span the overall distance between adjacent interior supports or to the outside of supports when at the end of a truss. The stability of this shape supported by the bottom chord is the reason for the common usage of the triangle truss.