Roof Truss Stress Points

Trusses that are banded together into a bundle are stiffer in comparison to a single truss but lifting a bundle of trusses by the peak can still cause undue stress and damage.

Roof truss stress points.

Bowstring trusses are usually analysed for direct stress as though the top chord were in a straight line between panel points. Stress points can indicate signs of roof damage winds. A roof truss consists essentially of the following components. Apex peak the uppermost point of a truss.

For bundles of trusses greater than 45 and up to 60 in length at least two lift points are required. A normal rainfall typically won t cause damage to your roof unless it has already been undermined by other weather. Battens purlins timber sections spanning trusses to support roof covering. Hence the length of the purlin is equal to the width of the bay i e the spacing of the trusses.

The bending stresses about both. Roofs are designed to withstand weight and tension by dispersing it over trusses or rafters. Axial force a push compression or pull tension acting along the length of a member. 1 to the curvature or may be solid timbers laid to the curved pattern with or without their top surfaces sawed to the curvature fig.

Trusses that are banded together into a bundle are stiffer in comparison to a single truss but lifting a bundle of trusses by the peak can still cause undue stress and damage. When high winds hit. Top chords may be glued laminated fig.