How To Tie Roof Rafters Together

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How to tie roof rafters together.

It is stamped into the wood at the factory with a hydrolic press. Starting two courses higher than where the new ridge meets the old roof unseal the shingle tabs a thin flat bar or a joint taping knife works well and pop the nails of the overlying course. Connect a flat roof to a sloped or pitched roof with a ledger board. To do this you will use gusset plates on either side of the rafters.

A collar tie is a length of lumber that attaches to each opposing rafter near the peak preventing your rafters from spreading apart. Drive 1 2 inch lag. For additional support you can use ceiling joists which are lengths of lumber that run from the end of one rafter to another. The truss companies use a gang nail to splice wood together pictured at left.

Remove siding from the house where the new roof will attach to expose. If you are framing a cathedral ceiling there are a couple ways to deal with the need for rafter ties. Use pieces of lumber that are the same width as the rafter beams themselves and align them on either side of the rafter beams. Here s a formula i use to determine tie force.

Collar ties also take the stress off of your wall plate and rafter joint. After the ridge is cut to the correct angle and length it s nailed into place. Remove two shingles to each side of the new valleys until you reach the bottom. To scribe the roof angle on the ridge a length of stock is leveled over from the common rafters and a 2 by scrap is set against the sleepers.

T w 2 x h h x run rise where w equals rafter load h equals height of ridge and h equals distance from ridge to center of tie illustration below. Using 16 penny nails secure the gusset plates to either side of the rafter beams.