OWSJ Identification 4

[Deener]

I have been asked to review the capacity of an existing OWSJ. I have been given dimensions and internal member sizes of the joist but no joist designation. Is there a table I can use to look up the joist designation based on the member sizes? i.e 30" deep, 3/4" square bar, 2 x 2 x 3/8" angle. Below is the sketch I received from plant maintenance. Max unfactored point load is around 400 lbs so we're exceeding the 100 lb rule. Joists are on 6' centers. No joist identification tags that I'm aware of.

Thanks in advance

 

[Deener]

Can confirm we're talking service level (unfactored) for clarity. Will be more clear with that in the future. My apologies.
Update:
We have checked the joist measurements and they are quite different than the original sketch given to us. The back to back angle that was originally failing in buckling closest to the support point of the joist is now passing thanks to an increase in member size (now 1 1/2" x 1 1/2" x 3/16) and a flat bar connecting their legs at their mid span. I am now investigating the potential for adding a 500 lbf (unfactored) point load to the bottom chord. One load scenario at center span and the other load scenario at about 1 ft from the end. I ended up going with 2" of gravel dead load on the roof. Weld sizes have been measured and 60 ksi electrode strength is used for conservatism.
Thanks for all the input everyone.