Thanks for your input, Dave.

I need to make up a beam because the actual length is 12 feet, 3
inches. I indicated a length of just 12 feet in an effort to keep
responses focussed on the main issue -- the number of lengths and
their placement relative to each other.

Darro

On Tue, 12 Feb 2013 12:06:22 -0500, "David L. Martel"
wrote:

Darro,

You can buy 3"x3"x12' posts. 30 lbs isn't much of a load. What are you
leaving out? I don't see why you want to "make" a beam.

Dave M.