Anyone have experience with steel open web joist composite slab systems?
I’m in the thought stages of the next build. I’m thinking about the viability of using steel open web joists with a composite slab system, vs wood open web joists.
Last build I got some experience with composite deck slabs by doing a concrete veranda deck over a conditioned space. I used the canam P-3615 composite decking with a span of 7′ between bearing points.
This decking can allow for some very long spans between joists, 7-10′ spans depending on which deck is used.
Even some of the other composite systems like the canam hambro system where the joist is the reinforcement to the slab, their joist spacings are around 4′ (based on load design)
Those compared to the 16″ spans of wood joists. For a build of say 15’x60′ footprint, it can be a difference of 45 wood joists and 28 sheets of ply per floor vs say 8 steel joists and 5 rolls of steel decking + 6 cubic meters of concrete per floor.
Just wondering if anyone has any experience with specifying, costing or building this way? Especially now with polished concrete floors being all the rage, even on upper floors. I’ve been seeing it on some ICF specs as well.
My general perception is the steel will cost more mostly because I only see it in commercial buildings. but when costing the materials of wood open web joists those are also very expensive. Wood is a lot of material and a lot of labour. Steel I assume is expensive but much less materials and less labour.
Looking for experience in cost, time and labour.
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