Reinforcing Roof Truss Frames Under Load

Top and bottom chords in compression can buckle laterally if not braced or appropriately reinforced.

Reinforcing roof truss frames under load.

Reinforce your roof a properly constructed roof in areas subject to high winds has trusses attached to walls with hurricane tiedowns properly nailed sheathing and heavy duty shingles. Connect roof sheathing to the roof framing with ten penny weight common or eight penny weight ring shank nails. Truss framed roof systems with high pitched top chords and horizontal bottom chords have a smaller weak axis moment of inertia than say a flat roof or floor joists and under shear load will tend to deflect more in weak axis bending. Space them four inches apart along the edges and six inches apart in the middle of the plywood sheathing.

Strengthening existing roof rafters is a difficult process that often requires professional help. Snow increases the overall weight of your roof adding to the forces acting on your rafters. Use wood adhesive underneath the sheathing along the connecting joint with the roof trusses. The owners of an industrial boiler plant in the northeast were required to reduce particulate emission levels from coal fired boilers.

These are usually accomplished during a complete re roofing. Reinforcing roof truss frames under load. Replacement of a two field electrostatic precipitator. Without altering the roof structure of an industrial boiler plant a long span steel truss frame was modified in place to support heavier loads.