Help with floor system


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Old 02-24-21, 01:07 PM
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Help with floor system

Can someone help with how to hang the joists in this scenario. Does it need more piers? Or this will work -- (yellow) beams transecting elevator wall (blue lines) and then run double 2x12 joists on both sides of the stair entry?

 
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Old 02-24-21, 02:54 PM
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Since there are no footers under your elevator and stair walls I assume those walls are not load bearing. If you very roughly consider your colored lines load paths you'll see that around the stairwell the lines end without support (cantilevered). Generally you don't have cantilevered beams and if you do there is another set of rules how to do it. So, most often you see beams supported at both ends.
 
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Old 02-24-21, 03:43 PM
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Thanks for the help. Here's the spans. Can you explain to me exactly where to add the additional piers to make this right? Or I can email this to you (?). On the left, do I widen the north/south span and have the piers run in front of the elevator and run below it on the bottom? On the right, just squeeze another pier right up against stair wall?

 
 

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