Design of Non Axially Loaded Base Plates 2

[Hallier]

What is the easiest design method for Non Axially loaded base plates? I already looked on the LRFD AISC Manual, 2nd Edition but they do not cover the topic. I have a 6' high 2x2x1/8 PTR post standing alone exposed only to wind load (is for a fence on top of a retaining wall). I already designed the post but I'm still wondering what is the procedure for designing the connection to the masonry retaining wall on the bottom. Is it going to be anchor bolts? or simply A307 Bolts attached to the concrete inside the masonry blocks? Any help will be really appreciated! Thanks in advance...

Hallier

 

[JAE]

A couple of methods:

1. Try to break down the plate into some rational deflected shape as you perceive it. With a post and four bolts, you could consider it a "beam" rigidly afixed to the post at it's center, with two opposite forces at the bolts, one upward and one downward. This really breaks down into a simple cantilever. The resulting bending in the plate can be then calculated and the thickness determined.

2. If you have the software, use a finite element mesh to analyze the plate and determine thickness

3. If you have the software - use proprietary baseplate programs to design the plate - RAM and RISA each have programs such as this.

 

[Taro]

Other references:

Design of Welded Structures by Blodgett

Beam-Column Base Plate Design-LRFD Method by Drake & Elkin, AISC Engineering Journal, 1st qtr 1999

 

[Hallier]

Thanks guys, Blodgett is a genius!

 

[UcfSE]

Also look at

Design of Steel Structures 2nd Ed. by Salmon and Johnson