How To Tie Roof Rafters Together

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.

How to tie roof rafters together.

If you are framing a cathedral ceiling there are a couple ways to deal with the need for rafter ties. 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. Here s a formula i use to determine tie force.

Connect a flat roof to a sloped or pitched roof with a ledger board. Collar ties also take the stress off of your wall plate and rafter joint. Drive 1 2 inch lag. A gang nail is basically a thin piece of metal stamped out so that many metal tangs stick out into the wood about a 1 2 or so.

How to tie a additions roof to existing roof roof additions to existing roofs how to construct a roof from an exsisting shead how to change a roof line how to attach a deck roof to existing roof how to add a roof over porch attache porch roof on house attach shed roof to house adding a roof to screened in porch adding a roof to existing. Wooden rafter ties cross the span between two opposing rafters mechanically tying the rafters together. Two types of rafter ties wood and metal are common to residential and light commercial construction. Remove two shingles to each side of the new valleys until you reach the bottom.

The truss companies use a gang nail to splice wood together pictured at left. Rafter ties or ceiling joists acting as rafter ties are required by code unless the house is designed so that the walls or a structural ridge beam carries the full load of the roof. Bore holes with a power drill and 1 2 inch bit through the ledger into the rafters or other sturdy frame elements. Rafter ties keep opposing rafters tied together to increase the strength of roof trusses.

Using 16 penny nails secure the gusset plates to either side of the rafter beams. After the ridge is cut to the correct angle and length it s nailed into place. Remove siding from the house where the new roof will attach to expose. To do this you will use gusset plates on either side of the rafters.

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.