In a project I'm working on I have preliminarily specified a 3-Way Fire Hydrant rated at 250 psig max working pressure and 500 psig static test pressure. I have specified this because the county has a fire engine. The line in the system is currently SDR 26 PVC and rated for 160 psig. Could...
Are commercial buildings typically designed to have 8" CMU load bearing block walls, wooden trusses, with a metal roof? I'm no structural engineer or construction guy, but this sounds kind of fishy to me. Is CMU block sufficient for lateral and compression loading? Is wooden trusses with a...
I'm looking into sizing an HVAC unit for a gas station. Is the Manual J method the best way to properly size the unit? I hear that 'rules of thumb' methods typically oversize the system which causes excessive cycling and improper performance.
I am looking at installing an 'anti-reverse rotation' clutch on the fan shaft. The purpose is to prevent the shaft from rotating backwards. The cause of reverse rotation is the wind. The clutch is said to be rated for 829 ft-lbs. What sort of calculation do I need to do to verify that this...
I have to write up a calculation which justifies cutting through rebar in a underground concrete wall which is a part of a pullbox which houses underground cables. Basically we're making a 4" diameter core drill and cannot avoid cutting through horizontal and vertical rebar. The rebar is 1"...
I have a static oil system which is pressurized max at around 450 psi. I want to replace the existing piping and valves with tubing with stainless steel compression fittings. Has anyone had problems using compression fitting such as Swagelok or Parker A-Lok in pressurized oil systems? I've...
