How Do I Join Two Roof Joists Together

I would go for something like that.

How do i join two roof joists together.

This is unusual in new deck construction and would only be necessary for very long spans that exceed the length of your longest boards. The truss companies use a gang nail to splice wood together pictured at left. Use m8 110mm coach bolts measure down 30mm from the top and bottom of the joists and drill through both the timbers and bolt together space the bolts out 600mm all the way along from one end to the other should be strong enough for a tap dancing elephant. Use pieces of lumber that are the same width as the rafter beams themselves and align them on either side of the rafter beams.

Sistering or joining joists. You can install a flitch beam which is two joists bolted together with piece of steel in between and then support and cut joists then fit hangers on to the new beam giving you flush ceilins answered 9th oct 2011 like 0. Using 16 penny nails secure the gusset plates to either side of the rafter beams. The term sistering joists is the practice of overlapping two joists by a certain distance across a beam to create an extended joist.

Slap some pva in the side pice s. It is stamped into the wood at the factory with a hydrolic press. Join rafters at the top or peak either to each other or to a centre ridge board. 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.

Sistering joists is commonly used when adding onto an existing deck or repairing a deck. The traditional method of joining is framing nails 10d or 12d which are long steel spikes hammered through one piece of wood into another. To do this you will use gusset plates on either side of the rafters. Put the joists end to end get a section of joist to span the gap each side bolts through washers on tighten up and you ve got one long joist braced with two sections where the two sections meet.

However if the loading is applied from above through floor sheathing through a load bearing wall or post that rests on both joists then no attachment between joists is required. Join rafters on the ends to wall caps the top boards on the outside walls which actually bear the weight of the roof.