If you want to be sure buy the CMAA #74 for single girder bridge beams and it give design specifications for hoisting. A simple factor does not take into account localized flange bending due to the trolley wheel loads. This standard takes into account both deflections and stresses. For...
We are having problems with water lines freezing this spring can anyone tell me why this happens when the weather warms up outside?
Does the water from on top of the ground tranfer the cold through surface cracks to the waterlines below and when we see a couple of cold nights it freezes again...
My question is whether or not it is safe to weld a used oil tank. I have read several methods that have been used to do this but almost all of them sound like back woods style and unsafe. Any suggestions on how this can be accomplished safely? Are there any published codes and/or documentaion...
Hello, I am attempting to create a vacuum by flowing air through a T joint. With a restriction at the 90 degree line to force the air by the T creating a slight vacuum effect in the 90degree elbow. it is working but I am using gravtiy feed also the help the material into the air flow. any...
