I work for an open we steel joist manufacturer. Occasionally we see EORs specify a minimum required moment of inertia. There are a number of reasons I can imagine them specifying this but I wanted to get a more comprehensive list from this community. If you are a specifying engineer, why might...
Trillers,
To be clear when I am referring to a vierendeel opening I am referring to a single rectangular opening in the middle of what is otherwise a regular open web steel joist with warren or modified warren panels.
With that said, putting a vierendeel opening in a joist happens...
As someone who works for the supplier that you are likely going to "throw it back on" I can tell you that it totally fine. If it is an SJI open web steel joist, we can evaluate and fabricate that. It may be possible to get it to fit without a rectangular ("vierendeel") opening by increasing the...
IBC 2015, chapter 16, section 1602, under "Notations" the code defines "L" as "Roof live load greater than 20 psf and floor live load". It defines "Lr" as "Roof live load of 20 psf or less". How do you interpret "L"? If I have a roof live load of Lr=25 psf am I to treat all 25 psf as "L" since...
I have number of fixed end moments on a roof truss. (due to dead, live, snow and wind) Some of the wind moments are negative. Do I just combine the negative numbers straight into the load combination with the positive moments for example from Eq 16-6 in IBC 2015...
0.9D + 1.0(-W) + 1.6H
Is...
