Reinforcing Roof Truss Frames Under Load

If dead loads must be hung from trusses then extra support can be provided by installing support beams perpendicular to the trusses reducing the span of the bottom chords and increasing their ability to carry the weight load.

Reinforcing roof truss frames under load.

Strengthening existing roof rafters is a difficult process that often requires professional help. Top and bottom chords in compression can buckle laterally if not braced or appropriately reinforced. Snow increases the overall weight of your roof adding to the forces acting on your rafters. 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. If you have a stick frame roof there are a few basic techniques that you can use to strengthen your rafters. The owners of an industrial boiler plant in the northeast were required to reduce particulate emission levels from coal fired boilers. 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. These are usually accomplished during a complete re roofing. Reinforcing roof truss frames under load. Use wood adhesive underneath the sheathing along the connecting joint with the roof trusses.