I am replacing a 3,000 sqft flat roof that currently has a EPDM system- held down with rocks. The new system I must evaluate requires mechanical fasteners directly to the concrete roof. ( Twin T construction)
I have been advised by the roofer to expect alot of spalling, AND assured that this...
I paid a firm to design a gear pump for me and I am REALLY skeptical about the design. I am not a mechanical engineer and am hoping you guys could give me some basic input.
This is a very small gear pump similar to a chemical spray pump. It is running off of a 9.6v battery and a small motor...
