Roof Trusses Terminology – General

 

Roof-Terminology1

CENTRE BEARING TRUSS: Truss with a structural support at its centre as well as at the heel points.

GIRDER TRUSS: A truss that performs the special function of supporting other trusses.

JACK TRUSSES: Small mono-pitch trusses in a hip construction.

MONO-PITCH TRUSS: A truss that has only one sloping top chord, with a vertical edge on the other side.

MONOPLANAR TRUSS: A truss with all chords and webs assembled in a single plane (as is the case with nail-plated trusses).

PIGGYBACK TRUSS: A truss that is split horizontally, usually because of transportation
considerations, with a standard or valley truss resting on top of a truncated truss.

SCISSOR TRUSS: A truss with sloping or pitched bottom chords.

SPLIT TRUSS: A truss that is intersected by a chimney or similar vertical obstruction.

SYMMETRICAL TRUSS: A truss with the same dimensions and configuration of members on each side of the centre line.

TRADITIONAL TRUSS: A truss that is built with lapped members, connected with bolts and nails.

TRUNCATED TRUSS: A truss that is flattened at the top to suite the height requirements dictated by its position in the roof. A truss may also be so manufactured because of transportation considerations, e.g. the lower portion of a piggyback truss.

TRUSS: A triangulated combination of members and joints that forms a rigid structural component of a roof, designed to support both permanent and imposed loads.

TRUSS TYPES: Names given to trusses with different shapes and different web configurations.

VALLEY TRUSS: A truss used to form a valley in association with standard or special trusses .

VIERENDEEL TRUSS: A truss that lacks triangulation in its frame, in which complete joint stiffness must be provided.

Roof-Terminology2

 

Roof Trusses Manufacturers Terminology – Truss Components | Roof Terminology

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