1st number:
2nd & 3rd numbers:
4th & 5th numbers:
Following Hyphen:
Number of diamonds to width or plank
Height (plank) or depth (walkway)
Gauge
Type of Material (no hyphen denotes Pre-Galvanized Steel)
2:
15:
14:
none:
2 Diamonds
1-1/2” height
14 gauge
Pre-Galvanized
2:
15:
14:
-B:
2 Diamonds
1-1/2” height
14 gauge
Black (Plain) Steel