Example Calculation:
B1.5” Mezzanine Deck is supported by four joists (three span) spaced 66” apart. What would be the lightest gage of B1.5” Mezzanine Deck allowable to achieve 125 pounds per square foot (PSF) assuming a uniform load?

Step 1 Locate the column labeled 66”

Step 2 Match the 66” column with the rows pertaining to three span

Step 3 Find the lowest value above 125 PSF and match the gage

Solution: 133 PSF = 20GA B1.5” Mezzanine Deck