What Size Coach Screws For Decking Joists

For best results refer to our wood and composite deck joist span table.

What size coach screws for decking joists.

Specialty decking materials have different requirements. Ledgerlok replaces lag screws and through bolts and the. Two that have established a track record are invisi fast and hidden link. If you re using hardwood or other decking thats 19mm thick the joist spacing will have to be reduced to 450mm centres or less.

Joist spacing o c 12 16 24 species. Decking railings and stairs most decking screws are 8 gauge and while 2 1 2 inches is the minimum length needed to hold decking boards to the joists 3 inch screws are commonly used to provide extra holding power against the upward pressure of shrinking or warping boards. Some have come and gone. M12 coach bolst1500mm.

The gauge is the diameter of the screw. For deck screws you are likely looking at either 8 or 10 gauge screws. 75mm long screws are suitable for most softwood decking and having diameter of 6mm. I need to bolts 6x2 to 4x4 posts for decking joist.

Fixing deckboards to joists do not over tighten the screw for with expansion and contraction over the years minute splits can appear. Span 3 of our deck cantilevers over the last bearer. To be specific 8 gauge roughly equals a diameter of 4 mm. We need to make sure the joist size we have selected previously can cantilever the distance required.

Ledgerlok is a code compliant deck ledger board to rim joist structural wood screw that can be attached with no predrilling. In typical deck construction with a ledger on one side of the joist and beam on the other the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above. They screw to the top or side of the joist and either screw from the bottom or into the bottom of the decking plank before it is flipped over and installed. The higher the gauge the larger the screw.

Due to weight what bolts would i be able to use that wil be strong enough.