IBC-Structures definition-Pipe Truss
IBC-Structures definition-Pipe Truss
(OP)
I am designing a pipe truss. The person checking my calculations wants to check a loading combination of 0.6 DL+WL as per IBC. My question is does IBC apply to pipe truss. The checker thinks that pipe struss is a structure. There is no definition of structure in IBC. I feel that process industry practices(PIP) does not have this loading combination. The loading combination is only DL+WL as per PIP. Any comments pl.






RE: IBC-Structures definition-Pipe Truss
If the truss is not subject to wind forces, then the load combo does not apply. Otherwise, use it as suggested.
Mike McCann
MMC Engineering
RE: IBC-Structures definition-Pipe Truss
RE: IBC-Structures definition-Pipe Truss
If you have a pipe truss and it is exposed to wind, then as an engineer you would want to use at least a 1.5 SF against overturning in your design.
The original D+/-W combo that you cite still used a 1.5 SF. The 0.6D +/- W just codified it into a load combination.
RE: IBC-Structures definition-Pipe Truss
I guess I do not understand the difference here - dead load is always there - never, but never changes. It is the live load that varies, such as wind, earthquake, personnel, equipment, furniture, etc.
What are you getting at here?
Mike McCann
MMC Engineering
RE: IBC-Structures definition-Pipe Truss
RE: IBC-Structures definition-Pipe Truss
However, as JAE said, the 0.6DL is meant to provide a minimum safety factor without actually introducing safety factors into the equations.
RE: IBC-Structures definition-Pipe Truss
RE: IBC-Structures definition-Pipe Truss
RE: IBC-Structures definition-Pipe Truss
RE: IBC-Structures definition-Pipe Truss