[Red Sleeper]

I ordered a 30’x40’ metal building a month or so ago. Received the call yesterday that it’s being released to the shop for fabrication. Going to have 15’ eves, a 16’x12’ door to the north, 12’x12’ to the south, and 8’x10’ to the east with a 3070 walk through on the north also.

Need some help on the slab detail as I have to meet wind storm code for coastal county.

To start, what’s a good spacing for rebar throughout the slab? 14”, 16”, 18”? My concrete contractor said 14” with #3 bars, just want another opinion.

Perimeter beams will be 12”x24” with a pier at each corner and a pier in the center of the beam on the 40’ length to support the metal column from the building. I’ll eventually have a 2 ton bridge crane running throughout the entire shop. Should I up to a 12”x30” perimeter beam for added strength? What size rebar for the beams? Contractor says #5.

Are 3/4” J-bolts sufficient to anchor the metal columns?

More questions to come as work progresses.