Extending my 18x24 shed to a 24x36 garage with 2nd floor for storage. The plan I submitted showed a monolithic slab with integral footings. BI notes on plan, go down 42 inches(frost line) , and 8 inches wide (?). I asked him if I could use the alternate rebar placements (R403.1.3.2 / 2009 IRC)- one #5 in middle 1/3 of footing instead of 2 #4's (top and bottom). He said NO. Can't use use alternative in a "frost wall" - ???? 2009 IRC - doesn't make reference to a "frost wall", only frost protection requirement to go down to frost line. I don't see an exclusion in R403.1.3.2 , for a "frost wall". And as far as the 8 inches go, the bottom of the footing should be 12 inches wide - right? This is all one big pour. 42 inches down, 12 inches wide.
The BI won't explain. Any ideas ? Thanks!
The BI won't explain. Any ideas ? Thanks!