2" minimum.
Minimum 1 1/2"
1/2" water lines. Drain line determined by flow rate of showerheads and bodysprays being used. 5.7 gpm or less flow rate would need 1 1/2" drain, which is minimum size allowed.
2"
Absolutely NOT you 2" minimum
drain piping 4 inch or larger requires a minimum clean-out size of 3 1/2".
2" minimum.
There is no physical minimum door size - custom doors can be made to any size. There might be building codes for your area specifying what the minimum door size is for a commercial or residential structure, though...
Minimum 1 1/2"
1-1/2 inch drain for above grade and 2 inch drain for below grade. Most UPC-based codes (IAPMO) require 2 inch above and below grade.
10 by 10
The minimum landing size required for stairs according to building codes is typically 36 inches in the direction of travel and at least as wide as the stairs themselves.
The minimum size wire that engineers spec for industrial and commercial installations is #12 and it usually is stranded not solid wire.
1/2" water lines. Drain line determined by flow rate of showerheads and bodysprays being used. 5.7 gpm or less flow rate would need 1 1/2" drain, which is minimum size allowed.
Length x Width and then Pitch with a minimum of 2" diameter and it is called a STORM drain as no one really wants to just let potable water run down a drain constantly as it can be quite expensive
Depends on how far they span from bearing points.
The outlet pipe needs to be a minimum of two inches and then expanding to the four inch main line