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glj24
Joined: 09 Jan 2006
Posts: 2
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 Posted: Mon Jan 09, 2006 1:45 pm Post subject: Floor bearing area |
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Hello,
I have a 1000lb unit with a 2' x 2' footprint that'll be placed into someone's home. If I assume the floor joist are on 16" centers is it safe to assume that two joist would support the load. This would give me a bearing width of 32" instead of 16" if I assume only one joist supports the load. Thanks |
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RWL
Joined: 10 May 2004
Posts: 399
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| Posted: Mon Jan 09, 2006 2:10 pm Post subject: |
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A 2x2 foot footprint for a 1,000 lb. load translates to a load of 250 pounds per square foot.
Most residential floors are designed by joist spacing, overall spans and by wood species at about 40-60 pounds per square foot.
You need a major upgrading of the floor and a much larger footprint to hold the unit without major deflection/sagging or failure! |
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glj24
Joined: 09 Jan 2006
Posts: 2
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| Posted: Mon Jan 09, 2006 2:57 pm Post subject: RWL |
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| I initially thought that, but I think you calculate floor bearing area differently than just using the unit footprint. If that was the case then me standing on a 1' x1' square tile would be applying a 200 psf load on the floor. I'm sure floors can handle my weight. |
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88
Joined: 15 Nov 2005
Posts: 74
Location: usa
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| Posted: Tue Jan 10, 2006 10:29 am Post subject: |
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Is it really 16 O.C ? What grade of lumber is it ? What is the span ? How deep is the floor joist ? Is there dry rot ? How are the walls, column supporting it ?
How good was the hanger ? Nailing per schedule? How old is the house ?
Can you 100% sure the owner is not doing to add more load ? How heavy is the owner ? There was a job a 400lb s owner fell through a rotted kitchen floor. Good luck ! |
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