How Do I Join Two Roof Joists Together

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 do i join two roof joists together.

Depending on how the load is applied it may be necessary to connect the two joists together with a filler block. 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 truss companies use a gang nail to splice wood together pictured at left.

Sistering or joining joists. 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. 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.

This is unusual in new deck construction and would only be necessary for very long spans that exceed the length of your longest boards. 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. Using 16 penny nails secure the gusset plates to either side of the rafter beams. Use pieces of lumber that are the same width as the rafter beams themselves and align them on either side of the rafter beams.

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. Sistering joists is commonly used when adding onto an existing deck or repairing a deck. But being a belt and brace s man. Join rafters on the ends to wall caps the top boards on the outside walls which actually bear the weight of the roof.

I would go for something like that. To do this you will use gusset plates on either side of the rafters.