Recent content by Cruizer

Thank you Nnv. You've been extremely educational. I've gone with the steel tube, which although it's not as strong as I'd hoped it is still more than I need. I will definitely add bracing too.

Actually, I should rephrase that. Would I be better off remaining with the 6x6 post or subbing in a 4x4 steel tube?

According to that result it looks like I should stick with the 6x6 pressure treated wood, which is rated to be used without lateral support up to 20 ft. Not to mention it can generally support 80-100kN of axial loading, in ideal conditions. Would you agree with that assessment?

I see. Can you tell me the compressive strength of the 15' 4x4 tube if the connection at the top is treated as a free connection? Depending on the answer and could add bracing to make the member stronger. I appreciate your great input.

The other horizontal direction will be indirectly restrained. By this I'm referring to the joists (one every 16"), which run perpendicular to the 2-2x12 beams. The joists rest on top of the beams and are connected with hurricane ties to the beam, and connected with joist hangers to the ledger board.

Yes, it is a pinned connection restrained in one direction. Won't translate.

The tube will be welded to a 1/2" thick plate and anchored to a concrete footing. Not sure if this qualifies as a fixed connection but it will restrain it in both directions. As for the top, I will have a 1/2" L flange which will hold 2-2x12 beams and connected with 2 - 1/2" bolts. In this case...

Thank you. Yes, yield strength is 46 ksi. 244 kN is still more than I would need and the price is unbeatable. Thanks again.

I'm looking to replace a 6x6x12 pressure treated post with 4x4 steel tubing. I was looking at a steel handbook and according to the "design strength in axial compression," a HSS4X4X1/4 for an "effective length" of 12ft is 72 Kips (72,000 lbs). Of course you still need to consider bracing...