Roof Rafter Ties

Secure the opposite side in the same manner.

Roof rafter ties.

For pricing and availability. Simpson strong tie 5 2 7 in 18 gauge triple zinc steel rafter tie. Rafter ties are always required unless the roof has a structural self supporting ridge or is built using engineered. Contrary to popular belief collar ties are not there to support rafters or to keep walls.

For pricing and availability. Collar ties prevent uplift. Contrary to popular belief collar ties are not there to support rafters or to keep walls below from spreading under the weight of the roof. The tie will go from one side of a roof rafter to an adjacent rafter but on the opposite side.

Nail one end of the tie into the rafter with 3 inch nails. Moving the rafter ties up only 16 inches from the plate the maximum allowed by code increases the tie force from 1 440 pounds to 2 160 pounds. Rafter ties prevent spreading. Where rafters are oriented perpendicular to the ceiling joists rafter ties should.

The tie force at the plate is 480 pounds and only 720 pounds when the ties are 4 feet up from the plate again the maximum allowed by code. This means that if you secure one end of the collar tie to the left side of a roof rafter you will nail it to the right side of the adjacent rafter. With the first collar tie in place you will follow the same procedure. Simpson strong tie 6 in 18 gauge triple zinc steel rafter tie.

In most homes the ceiling joists also serve as the rafter ties. Simpson strong tie category roof truss and rafter connectors ties and straps for cold formed steel construction. Compare this with a similarly framed 12 12 roof that has similar loads.