Column Beam Sizes? The column ht

[DavidSan]

Column Beam Sizes?

The column ht. will be 9' supporting 125LB live ld.
The lenth of longest unsupported span is 20'
The total length is 70"
The width is 20"

What size columns and beams would be appropiate for a bolt together application?

Thanks,
David

 

[ishvaaag]

You seem to require a design, David. The particular details depend on what the owner wants, the designer is able to provide, and (theoretically at least) what codes allow.

Hence without the natural interactions occurring in the design of a building or structure, providing one may fail to satisfy some of the requirements of the owner or applicable code, for as you know, one thing may be safe, and yet not be safe enough according to the code. There are buildings that are not safe enough, nor ever were by any code if any of the same era, and are still with us in perfect serviceability. Simply these structures or buildings never met the loads our standing codes imagine they may potentially be subject to.

After subjecting you to this exposition, a very detailed study about what you want may take some time. A loose one for sure not, but I not being up to date to your (I assume American) code standards, I defer to any other contributor to detail your design.