Footing details 1

[RubenGman]

I'm building a purgola (some people call it an arbor) in my backyard and I'm in need of standard footing details for a four post pillar. Each post is a 4x4 (douglass fir no.1). I'm grouping four of these per corner to support the 24' long 4x12 beams. Does anyone know were I can obtain detailed drawings that illustrates how to correctly anchor support posts into concrete for an outdoor structure?

 

[Lion06]

Visit Simpson Strongtie online at

http://www.strongtie.com

and look up column/post bases.

 

[MiketheEngineer]

Find your load at each post

Assume a soil capacity of 1500 psf unless you know better.

Size the footing (round or square) to meet this

Dig down below the frost line (call local Code authorities for that info)

And then go to Simpson (as suggested) to get anchor details

The Simpson anchor will carry no moment - so figure out some kind of lateral bracing.

Don't forget to check wind uplift.

Good Luck and have fun.

 

[RubenGman]

Thanks Mike,

CB44 is the post base suggested. Are you suggesting some sort of gusseting at the top of my post connection for lateral bracing?

~Ruben

 

[Tomfh]

Yes you need some sort of rigid connection where the posts meet the beams.

A lot of these structures end up pretty rickety because no-one makes the joints rigid enough. My uncle's is currently being stabilised by a grapevine. Another one at my friend's farm has a lean that increases about an inch a year.