thanks a lot guys, i think that's what i'm going to do. triple strand both directions adjacent to the opening with some additional bars for the accompanying 3' or so near the opening. Would it be reasonable to cap the perimeter of the opening with some C9x15's? Thanks for the replies.
Does anyone know if the code has stipulations for a concrete slab with a signifigant void in the center with reguards to steel reinforcement? for example: I am trying to design the reinforcement for a 31'x25'x8" elevated slab with a 5'x5' opening in the center supported by concrete beams on all...
What is the best way to estimate the shear strength of a peticular wood truss? I have been able to backwork span tables to find moment strength, but is there some sort of rule of thumb for max shear?
