Steel posts for patio support

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Old 10-06-04, 04:11 PM
S
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Steel posts for patio support

I have an existing open patio (attached on one side to my house) that has 2 ornamental/structural wrought iron "L" shaped (about 6in each side of the L) corner posts and a third flat one (6in wide) in the middle. These are bolted to a brick knee-wall on the bottom and bolted to the wood ceiling structure on the top. The lenght of each of these is 5ft.

I am planning to enclosed this patio by installing windows and for ease of intallation would like to replace the iron posts with 3x3 or 4x4 square steel posts. I guess the posts would have to have endcaps that allow me to bolt them to the brick knee-wall and the wood ceiling structure.

Where can I buy such steel posts? Is there a place that I could order these prefab or need to custom build it myself?
 
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Old 10-08-04, 04:37 PM
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What is the roof made of, and how heavy is it? You can get extruded steel tubing (thin guage), in 2 by 2 and 3 by 3" (very strong), up to 2" by 3" welded tube that is 1/8" wall thickness ( i've used to jack up a single story house). And why not use wood (4 by 4) ? Tubing is much stronger than "L" shape which is stronger than straight strap. If your area has enough people there should be a steel distributor listed in the phone book. Chain link fence post in the thicker 2&3/8" round are pretty strong, come 6', 8' long. You can use a masonry (carbide) drill bit to bore holes in the brick for expanding lag bolt nuts. Dont tighten too much as brick will easily crack.
 
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Old 10-12-04, 04:27 PM
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I have no idea how heavy the roof structure is. The overall dimensions of the patio are 16ft by 12ft.
The roof is a standard A-frame wood frame with composition shingles. The ceiling has 1/2 in thick plank wood.
Since I will be installing windows, I was thinking of a standard framing made with 2x4's. Don't you think the 3x3 steel posts would fit better with the 2x4 framing?
Thanks,
Adrian
 
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Old 10-14-04, 01:06 PM
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Since your objective is to fully enclose your patio with framing and windows, is there any particular reason you feel you need to keep the roof supports? If you do the framing right, the walls themselves will support the roof, and these vestigial supports can go.

Since the roof is attached to your house, I'd be willing to bet that you need a building permit for your project anyhow, in which case the inspector will dictate the roof support (if he doesn't make you replace the roof as well).
 
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