Description
Type “H” & “H Cellular” (6″ Deep Roof Deck)
Cellular decking is typically used in exposed ceiling areas where a flat bottom ceiling is desired without compromising any load capabilities. The H Cellular is designed with the strength of roll formed steel combined with a finished bottom plate.
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Section Properties (Fy=33 ksi)
Gage Design Thickness Weight (psf)Glv Ip(In4) In(In4) Sp(In3) Sn(In3)
20 .0358 3.37 4.9065 5.7104 1.391 1.614
18 .0474 4.31 6.9754 7.8215 2.0557 2.2796
16 .0598 5.39 9.1359 9.8338 2.7339 2.9773
– Section properties calculated in accordance with AISI specifications
Gage Weight (psf)Glv Ip(In4) In(In4) Sp(In3) Sn(In3)
20/20 4.77 6.169 5.391 1.277 1.261
20/18 5.6 6.458 6.781 1.255 1.693
18/20 5.71 8.635 6.579 2.101 1.59
18/18 6.53 9.422 7.849 2.032 1.969
18/16 6.89 10.08 11.216 2.112 2.439
16/18 7.61 11.897 9.214 3.044 2.241
16/16 7.85 12.837 11.051 3.074 2.722
Acoustical Data Absorption Coefficients
125 250 500 1000 2000 4000 NRC
.67 1.03 1.19 .99 .87 .77 1.0
Single Span Uniform Total Load in Pounds Per Square Foot (Dead and Live)
Type Gage 15’-0” 16’-0” 17’-0” 18’-0” 19’-0” 20’-0” 21’-0” 22’-0” 23’-0” 24’-0” 25’-0” 26’-0” 27’-0 28’-0” 29’-0 30’-0”
H 20 55*** 51*** 48*** 46*** 43*** 41*** 39*** 37*** 35 32 29 27 25 23 22 20
H 18 95*** 89*** 84*** 79*** 75*** 67** 59 53** 48** 43** 39** 36** 33** 31** 29** 27**
H 16 145*** 136*** 127*** 115 97** 85** 75 66** 59** 53** 48** 44** 40** 37** 35** 32**
HC 20/20 55*** 51*** 48*** 46*** 43*** 41*** 38 35 32 29 27 25 23 22 20 19
HC 20/18 55*** 51*** 48*** 46*** 43*** 41*** 39 36 33 30 28 26 24 23 21 20
HC 18/20 95*** 89*** 84*** 79*** 75*** 69 63 57 52 48 44 41 38 36 33 31
HC 18/18 95*** 89*** 84*** 79*** 75*** 69 63 57 52 48 44 41 38 36 33 31
HC 18/16 95*** 89*** 84*** 79*** 75*** 70 63 58 53 49 45 41 38 36 33 31
HC 16/18 145*** 136*** 127*** 121*** 111 100 91 83 74** 66** 60** 55** 50** 46** 42 39
HC 16/16 145*** 136*** 127*** 121*** 112 101 92 84 77 70 64** 58** 53** 48** 45 42
Notes:
- Load tables are calculated using section properties based on the steel design thickness shown in the Steel Deck Institute (SDI) design manual.
- ** Loads shown in the green shaded areas are governed by the live load deflection not in excess of 1/240 of the span. A dead load of 10 psf has been included.
- (no stars) Loads shown in the unshaded areas are controlled by a maximum stress of 20 ksi.
- *** Loads shown in the beige shaded areas are controlled by web crippling with a minimum 3” bearing.
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