Roof Nails On Deck Joists

The use of roofing nails as structural attachments for joist hangers is not uncommon however it should be avoided.

Roof nails on deck joists.

Position the reinforcing joist tightly against the damaged joist and attach it with 16d 3 5 galvanized nails driven every two feet or fasten it with 3 1 2 inch galvanized deck screws. It can even cause damaging expansion and contraction if water penetrates these holes and freezes. For double shear single hangers photo 4 fasten the hanger to the joist s with longer 8d or 10d nails. Deck joist beam sizing tables a quick rule of thumb for sizing joists.

Now you can slip the joist into the hanger and drive the nails that go into the joist. For double hangers use 8d or 10d nails. But they usually hang from the ledger that is bolted to the house on the inside. Remove the guide and drive nails to attach the hanger.

This can cause the joist to rot from the inside out. Treat all sides of the reinforcing joist with a clear sealer and let it dry. Some manufacturers sell special decking nails with a head size in between the two. Indoors or out for standard type single joist hangers use only 1 1 2 in.

Hang the joist with a bent over nail. For 5 4 decking use a 10d 3 inch nail. The 16d nails will fasten your hanger to the wall ledger while the 10d nails will be nailed through the side flange of the hanger into the joists. For thicker decking use a 16d 3 1 2 nail.

I believe simpson strong tie calls for 3 1 2 16d hot dipped galvanized nails to be double shear nailed through their joist hangers filling every hole. This type of hanger requires fewer but longer nails for the side flanges. Roofing nails just can t handle the shear stress. Spans sizes and spacings for deck joists and deck beams are discussed in detail.

Roofing nails are not made to withstand the structural forces that are required for joist hanger connectors. Start driving a nail near the top end of the joist then bend it over. True the joists sit on the beam on the outside on the deck. Using a 3 inch galvanized nail and nailing it flush will pull the boards tighter versus sinking through the.

For standard joists you will use the 1 1 2 inch galvanized hanger nails to attach the joists using standard joist hangers. Joist hanger nails for nailing into the side of the joist photo 5. This part of your deck construction is labor intensive.