How To Attach Roof Joists To Wall
If it is impossible to attach the ledger to a floor joist then fasten the ledger to wall studs which are generally located on 16 inch or sometimes 24 inch centers and doubled up around doors windows and other openings.
How to attach roof joists to wall. Temporarily nail or brace the ledger in place positioned and leveled at the desired height. Then force the rafter s tip snugly against the house wall. Joist hangers can help you mount each rafter to the house. Using a block of wood as a ruler mark the ends for cutting.
Another great way of attaching the truss end to the top wall plate is to use a simpson fastener shown in the picture above which you can find at your local lumber store. Secure it with a joist hanger using the hammer and nails. As with rafter style roofs toenailing is one of the most common ways of attaching a truss style roof to a wall plate. If you decide on a shallow pitch porch roof use 2 by 6 foot rafters.
The joist can be toe nailed into the top plate or a joist bracket can be used. The positioning of your rafters will depend on the pitch of the porch roof. There are basically 2 different ways to attach a roof joist to the top wall plate. Measure and mark the location of the roof trusses.
Attaching wood framing members to a brick wall is tricky especially if the framing will support any load as it does when a roof intersects the wall. The porch roof may match the pitch of your home or have a more shallow roof pitch. Some building codes around the country require the use of a hurricane tie also shown above to add extra reinforcement for holding down roof trusses in the event of very strong winds. Repeat this step to attach the remaining trusses.
The bracket is a better idea for the fact that is prevents any type of warping or rollover of the joist when it is under heavy load. Use screws to secure the rafter to the sill plate.