how long should your deck screws be? deck screws should be 3.5 in length for 2-inch thick lumber or 2-½ to 3 for 5/4-inch thick boards for the screws to drive deep enough into the joists to hold the board secure. how many screws do i need for my deck. now that youve selected the type of deck screw you want to use, its time to calculate how many to buy.
this part of the deck ranges from about 12' to 15' off the ground and it's got 2 support beams. the first support is about 8' from the house, and that's rock solid a 4' x 12' beam with a solid foundation . unfortunately, the second 'beam' is not so great.
once you know the lineal meterage of decking required it is quite easy to approximate how many screws you will need. say you need 500lm of decking, divide that by .450 which is your standard joist spacing. then times it by 2 because each decking board need 2 screw to fix it to each joist.
posts about how many screws needed to install decking written by cedar country lumber. you will need approximately 350 screws per 100 square feet, and approximately 480 screws per 100 square feet with the same 16 on center joist framing for 4 material, when using two screws per joist. for other types of fasteners, refer to the
screw down both ends of your strhtedge after marking the decking. then measure the distance from the line to the strhtedge in the center to make sure its the same as the end measurements. if necessary, bend the guide board until the measurement is the same and screw down the center.
built about 20 decks start to finish with a crew, and we always used 2 screws on wood decks, torx head outdoor screws, predrilled with an 1/8 pilot hole unless we were using composite decking boards with hidden fasteners. hidden fasteners required 1 screw per joist, but these boards were not prone to cupping.-- from pittsburgh, pa
three-inch decking screws are the best fastener choice; they sink a secure distance into the joists and won't back out like nails. there's little danger of splitting the boards when driving them
composite decking can be fastened to treated wood joists with screws or with hidden fasteners. using composite deck screws is critical because they are specially designed to help hold the material in place.
look at the ends of the boards and install the decking 'barkside' up to prevent cupping. install decking with 3' pressure treated compatible deck screws instead of nails. use 2 nails for each joist to deck board connection. locate screws about 3/4' from the edges of boards.
getting ready to build a new deck and have heard some people using 3 screws per board and others 2. will be using 5/4 decking. also has anyone used the quick set concrete on their posts? i have heard of people putting in the concrete dry and letting the ground moisture set up the concrete,
if you convert it to oz/screw and plot it and run a regression you would expect one line for 6 and one line with a steeper slope in oz per inch for 8 screws, since the 8 would be nearly twice as heavy per inch being probably 1.5 times as thick in the body of the shank.
once all of the decking is in place, snap a chalk line so that the screws can be installed in strht rows over the underlying framing. each board should recieve 2 screws per joist, spaced about an inch from each edge.
when face screwing or nailing a 6 product down on framing that is 16 on center, you will need approximately 350 screws per 100 square feet, and approximately 480 screws per 100 square feet with the same 16 on center joist framing for 4 material, when using two screws per joist.