What is Type B roof deck?
Type B Steel roof deck features an efficient 1.5” deep steel deck and the highest strength-to-weight ratio of any commercial deck type. Type B is the most popular choice for new construction projects, since it can carry higher loads and longer spans than Types A or F roof deck. With Type B, the steel supports below the metal deck can be placed further apart than other 1.5” profiles, leading to savings for the building owner.
Type B roof deck dimensions and specs
Industry designations
- Type B Deck
- Wide Rib
- WR
Gauges
- 18
- 20
- 22
Finishes
- Primed Gray (protects the base steel in a properly enclosed, dry environment)
- G60 Galvanized (protects the base steel in more aggressive interior environments or areas where greater corrosion resistance is required)
Maximum construction span
| No. of Spans | Deck Type | Max Const. Span |
|---|---|---|
| 1 | B22 B20 B18 B16 | 5′-7″ 6′-5″ 7′-5″ 8′-8″ |
| 2 or more | B22 B20 B18 B16 | 6′-0″ 6′-6″ 7′-5″ 9′-4″ |
