Floor Joist Spacing Metric

Maximum floor joist span for no.
Floor joist spacing metric. This is the distance between joist centres. 1 psf lbf ft2 47 88 n m2. Start by measuring the full length of your deck outside of bearer to outside of bearer and then subtract the thickness of one of the floor joists. This means from the center of one upright joist to the center of the next.
Home joist span calculator. The formula looks like this. Given that 2x8s are actually 1 inches wide it works out to be 14 inches between each joist. Normally floor joists are spaced 16 inches apart on center.
Some brands like weardeck let you get away with more reinforced with a layer of fiberglass on both the top and bottom weardeck boards easily allow for spans of 24 inches oc. Then divide this measurement by the maximum floor joist spacing that is mentioned on your drawings. So when would you ever need to use 12 inches oc. Most composite and pvc decking brands like trex and azek recommend a minimum joist spacing of 16 inches oc.
Live load is weight of furniture wind snow and more. With some structures floor joists are required to be 12 or 24 inches apart on center. Remember to complete all calculations using millimetres. Dead load weight of structure and fixed loads 10 lbs ft2.