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metal building foundation design
- Thread starter purdue87
- Start date
msquared48
Structural
This is not rocket science.
1. Just design the vertical reaction from the mainframes for P/A, making sure the uplift is compensated for in the dead load of the footing/slab/grade beam. Don't forget to check the sidewall X brace and any portal frame reactions against the same footings. There may also be additional X brace reactions to design for at the endwalls.
2. Also, the thrust from the mainframes is taken by rebar hairpins -"usually #4,5 or 6 bars, bent in an open "U" shape, flared to the outside at 2:1, with the anchor bolt pattern inside of the U. I usually just use one 20 foot section of rebar and bend it accoringly. A grade beam tension tie can be used if the size gets too big.
There are other tricks, but those are the basics. Nothing fancy here.
Mike McCann
MMC Engineering
1. Just design the vertical reaction from the mainframes for P/A, making sure the uplift is compensated for in the dead load of the footing/slab/grade beam. Don't forget to check the sidewall X brace and any portal frame reactions against the same footings. There may also be additional X brace reactions to design for at the endwalls.
2. Also, the thrust from the mainframes is taken by rebar hairpins -"usually #4,5 or 6 bars, bent in an open "U" shape, flared to the outside at 2:1, with the anchor bolt pattern inside of the U. I usually just use one 20 foot section of rebar and bend it accoringly. A grade beam tension tie can be used if the size gets too big.
There are other tricks, but those are the basics. Nothing fancy here.
Mike McCann
MMC Engineering
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