Roof Truss Bottom Chord

Removal has left them extremely vulnerable to collapse due to spreading especially under snow loads but also under just the load of the roof itself.

Roof truss bottom chord.

For example if the bottom of the truss is buried in insulation while the remainder is in the open attic air this condition can occur. It is utilized in a framed roof comprised of rafters and a ceiling joist. Those trusses were engineered with a heavy critical dependency on the bottom chords which are in tension. Continue reading below our video of the day.

The roof system is basically a hinge now. I would like to raise it 12 to 16 inches from the bearing point out 12 feet. Roof truss uplift occurs when the bottom chord of the truss is exposed to significantly different moisture or temperature conditions than the rest of the roof truss. This creates additional surface area for the two members to transfer forces and allows for them to be plated together creating a strong resilient joint.

The stability of this shape supported by the bottom chord is the reason for the common usage of the triangle truss. And the responses from the experts and my take on each one.