Roof Truss Bottom Chord Repair

A domestic roof engineered truss has had the bottom cord cut to install an attic access hatch door.

Roof truss bottom chord repair.

Roof trusses are engineered components. Prior to beginning the repair lay the truss flat on a solid level surface. Standard repair detail for permitting the removal of a section of bottom chord of a valley truss. Standard repair detail to pad top chord to match roof plane 2 1 2 maximum.

Seek professional guidance if anything is unclear. 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. Roof truss damage and repairs. To repair the damaged truss would be to lose the attic access unless the truss was designed.

Frankly it would probably have been cheaper to build a new garage rather than monster the existing one and now have to repair it. Place a screw jack found at any hardware store between the 2x8 on the floor of your attic and the sagging truss where the 2x4 is attached. Repair the truss by following the information provided in the trdd exactly. When damaged or altered this can effect structural integrity of th e roof system.

It is utilized in a framed roof comprised of rafters and a ceiling joist. Localized damage to one or two trusses will typically not result in structural failure of the roof system but could cause the. To my thinking a truss with a cut bottom chord is useless. Make sure to use the correct materials as specified.

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. Cut bottom cord of engineered truss. Temporarily screw a 3 foot 2x4 to the bottom of the sagging truss so that the 4 inch side of the 2x4 is flat against the bottom of the truss and in the center of the sag. If the truss is already installed shore up the truss to relieve any load.

It would have been less work to remove the roof and then re truss leaving the bottom chords in place to support the walls until the new roof framing is on. The horizontal beam of the triangle of a bottom chord is used in this simple triangle truss construction. It has been cut adjacent to a node point.