Lazerus, I'm curios why Canada doesn't allow copper for air. What do plants do for breathing air, control air or instrument air? SS tube & Swagelok fittings?
Why not use Afco structural columns? Good look and easy to install. Like Big Bad said they have a slide up trim cap. I think Lowes sells them, won't buy from gay hd. I get them at my local lumber yard. A 5" column is rated for ridiculous load like 13K
Junky, post some pics. I'm framing a 26' x 38' 2 car I'm adding on to my house. Might be able to offer a decent suggestion. Only problem I have with tying into an existing roofline is the sag in the future. Our last house did that. 10 yr old house & a 3 yr old garage didn't settle & sag at the...
If you are drilling piers dump bentonite into the hole & reverse your auger. The bentonite will seal off the pores in the earth . You will need to pour asap. I don't know where you live but in Oklahoma it's about $8-9 for a 50# bag.
Copper, steel pipe(black or galvanized) or Transair. PEX might have the same problem as PVC. It's designed to carry water, not compressed air with oil vapor in it. It's the oil from the compressor that causes pvc pipe to shatter. Their is a PVC that is oil safe but has to be made to resist the...