So I am building a 12x24 shed that will be used as a small powerlifting gym. I want to to use composite decking and concrete for the floors, that will be sitting on 4x4 pressure treated skids on a gravel pad. The reason for this is so that the entire shed can be moved vs just pouring a concrete slab and building the shed on top of that. My question is, what size of composite decking would I need to use to withstand a live load from someone deadlifting say 600lbs, and the weight being dropped from approximately 4ft. My original plan was to have 4 skids spanning the 12ft wide distance, so three separate runs of 4ft unsupported span. I could add another skid and make the unsupported spans only 3 ft. just wondering if this might work?
If you are not pouring concrete then you can use a roof deck. The deeper the deck = the stronger the deck. 1.5" or 3" deep will be your options. Here's a link and you can find load charts in the roof deck catalog that's located on the products pages for the different types of decks. God luck with your project. www.metaldeck.com/metal-roof-decking
Form deck is not composite decking. Composite decking has embossments in it. Composite metal decking and the concrete bond together to create a composite metal floor deck. The main advantage of a composite metal floor deck is that it will increase the strength of the floor without adding extra weight. With form deck that doesn't have embossments it is simply there to support the weight of the concrete. Roof deck is smooth and does not have embossments.
