How Do I Join Two Roof Joists Together

Using 16 penny nails secure the gusset plates to either side of the rafter beams.

How do i join two roof joists together. It is stamped into the wood at the factory with a hydrolic press. 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. But being a belt and brace s man. Sistering joists is commonly used when adding onto an existing deck or repairing a deck.

Depending on how the load is applied it may be necessary to connect the two joists together with a filler block. 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. 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. I would go for something like that.

When a load is applied to one side of a double joist by another joist or header for example then the double joist must be connected together so both joist members are effective in supporting the load. The truss companies use a gang nail to splice wood together pictured at left. Sistering or joining joists. 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.

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. Use pieces of lumber that are the same width as the rafter beams themselves and align them on either side of the rafter beams. Join rafters at the top or peak either to each other or to a centre ridge board.

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. The traditional method of joining is framing nails 10d or 12d which are long steel spikes hammered through one piece of wood into another.