I'm using 3 1/2in 16D nails spacing them 6-8in apart on the board with 3 nails in each column so approximately 21 nails per 4ft board. Probably because screws have to be made of a stiffer (and therefore more brittle) metal than nails. I frequently use gun-applied construction adhesive for joist sistering. Nails are … I am securing them with around 4 to 6 100mm No.6 wood screws and 4 x M10 Nut and Bolts. Joist sistering is adding an extra identical floor joist, to a damaged or inadueqate floor joist, and tieing the two together with screws or nails. The nails do stick out the other side of the floor joist and I … While structural nails are typically used to fasten joist hangers, you may be wondering if screws can be used instead. I'm sistering some knotched floor joists in my house. Is the spacing still 18" when joists are added? Any specific style? Hi, Im sistering joists (7x2) 2.5 meters in length. Using your deck example—you should use nails to attach the joists to the deck framing but use screws to fasten down the decking itself.. decker Answers: Nails are … These have been covered a couple times in different threads. Using the engineering toolbox website you may be able to calc. It is a very effective way of adding the additional strength needed to hold up a sagging floor. Let’s take a closer look at how this was accomplished. For sistering, What product(s) should I look at? The glue also helps eliminate creep and provides rigidity that the mechanical fasteners cannot. We used glue-lams and cut them down and then used full sized joist hangers (stimson makes a version for rough cut wood) to capture both joists. Nails are often preferred for structural joining, including framing walls, because they are more flexible under pressure, whereas screws can snap. Advantage of open bottom scenario. From my reading, nails are generally prefered over screws (personally like screws, but breaking strength is where nails shine). Right now my higher cognitive functions have been disabled by a high BAC but tomorrow I may be of more help here. 16" oc is the rule. If you are worried about the inspection, just add another joist, even if 2x4. Pre nail and palm nailer, longer wood screws at an angle, pre screws and angle drill. I use a lot of it, but it's not full spread by any means. the shearing force between joists used for sistering and so decide if you need nails, screws, through bolts or duct tape. Leveling the Floors. I will also be looking to glue. Nails are generally better for that strength, but they do not provide the necessary clamping action. You can use screws explicitly made for joist hangers. Nail or screws from the other side. I would either nail off or use #10 or better screws on a staggered 8" run, as well as liberal application of construction adhesive before clamping. Think about how you're going to get a tool in the space. My neighbour used deck screws to attach the wooden treads to his new porch steps and, within 2 weeks, 1/4 of the edge treads had screws that had snapped. Would you say i need to use construction adhesive also or do you think that what i have used will be ok. However, avoid using any other types of screws as they cannot support joist … In an earthquake (BC is an earthquake zone), screws snap whereas nails bend. Long story short, 24" C2C, true 2"x8" joists.
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