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load factor in staad pro

 
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velrajkumar.g
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Joined: 30 Mar 2013
Posts: 21

PostPosted: Sun Jun 27, 2021 2:52 pm    Post subject: load factor in staad pro Reply with quote

Dear sir,

In staad pro, load combination we add 1.5 for DL and LL (1.5DL+1.5LL) and design of footing the load on footing is axial load on individual column /1.5 or  individual column /3 which is correct.

Somebody says divide by 3 because we add 1.5 for both DL and LL


Regards
G.Velrajkumar



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vikram.jeet
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Joined: 26 Jan 2003
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PostPosted: Sun Jun 27, 2021 3:50 pm    Post subject: Reply with quote

Foundation design:

In staad , the input on loading combination is :
1.5*DL + 1.5*LL

For comparing base pressures underneath footing ,  the  Factored Column load shall be divided by 1.5 to arrive at working Load on column footing . Base pressures must be worked out for. Working load without any load factor.
However for structural design of footing slab , Factored loads shall be used as shown by staad output.
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