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Terms
Type B Metal Roof Deck is a 1 1/2" deep, wide rib, structural metal roof deck section that provides a support surface for various types of roofing materials.
Unit of Measure

Design Thickness

N/A 18 gauge (0.0474") 20 gauge (0.0358") 22 gauge (0.0295")

Height (Min.)

N/A 1 1/2 in

Rib Spacing – Bottom (Min.)

N/A 1 9/16 in

Rib Spacing – Top (Max.)

N/A 2 1/2 in

Pitch (Rib Spacing – Center to Center)

N/A 6 in

Cover Widths

N/A 36 in

Industry References

N/A Type B, Wide Rib, WR

Finishes

N/A Galvanized G60 Galvanized G90 Painted Gray Top/White Bottom Painted Gray Top/Gray Bottom Stainless Steel

Special Applications

N/A Acoustical Cellular Cellular & Acoustical

N/A

Deck
Type
Span
Condition
Design
Thickness
 Inches
Uniform Total (Dead & Live) Load in Pounds per Square Foot
Span Length - c. to c. Joists or Purlins (Ft. - In.)
4'-0" 4'-6" 5'-0" 5'-6" 6'-0" 6'-6" 7'-0" 7'-6" 8'-0" 8'-6" 9'-0" 9'6" 10'-0"
WR 22  
 
0.0295      90 70 56 46                     
WR 20 0.0358      113 88 70 57 48 40          
WR 18 0.0474     159 122 96 77 64 54 46 40      
WR 22
0.0295     96 79 67 57 49 43          
WR 20 0.0358     123 102 86 73 63 55 48 43      
WR 18 0.0474     164 136 114 98 84 73 64 57 51 46 41
WR 22  
0.0295     119 99 83 71 61 53 47 31 36    
WR 20 0.0358     153 127 107 91 79 68 58 50 43    
WR 18 0.0474     204 169 142 121 105 91 79 67 58 51