Type A Roof Deck Narrow Rib

Type “A” Roof Deck (Narrow Rib)

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Type “A” deck is mainly used as a retrofit to match the existing deck. This is due to a lack of efficiency as a whole. Compared to other deck types Type A deck has the lowest strength to weight ratio.

Call 305-760-2575  FOR A FREE QUOTE

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All of our deck products meet the requirements for steel deck certification specifications of Steel Deck Institute.

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Type "A" Roof Deck (Narrow Rib)

Type “A” deck is mainly used as a retrofit to match the existing deck. This is due to a lack of efficiency as a whole. Compared to other deck types Type A deck has the lowest strength to weight ratio.

Call 305-760-2575  FOR A FREE QUOTE

Section Properties (Fy=33 ksi)

Gage Design Thickness Weight (psf) Ptd Weight (psf) Galv Ip(In4) In(In4) Sp(In3) Sn(In3)
22 .0295 1.65 1.70 0.1463 0.1463 0.128 0.1297
20 .0358 2.09 2.15 0.1779 0.1779 0.1564 0.1574
18 .0474 2.71 2.80 0.2366 0.2366 0.2083 0.2083
16 .0598 3.30 3.40 0.2998 0.2998 0.2627 0.2627


- Section properties calculated in accordance with AISI specifications

Uniform Total Load in Pounds Per Square Foot (Dead and Live)

Gage Span Cond Max SDI Const SP 4’-0” 4’-6” 5’-0” 5’-6 6’-0” 6’-6 7’-0” 7’-6” 8’-0” ” 8’-6” 9’-0”
22 One 5’-5” 108 85 69 57 48 41 35 30
20 One 6’-0” 131 104 84 69 58 49 43 37* 32*
18 One 6’-11” 174 137 111 92 77 65* 54* 46* 39* 34* 30*
16 One 7’-9” 173 140 116 97 80* 66* 55* 47* 41* 36*
22 Two 6’-4” 108 85 69 57 48 40 35 30
20 Two 7’-0” 131 103 84 69 58 49 42 37 32
18 Two 8’-1” 174 137 111 92 77 66 56 49 43 38 34
16 Two 9’-1” 173 140 116 97 83 71 62 54 48 43
22 Three or More 6’-4” 135 106 86 71 60 51 44 38 33
20 Three or More 7’-0” 164 129 105 86 73 62 53 46 41 36 32
18 Three or More 8’-1” 172 139 115 96 82 71 62 54 48 43
16 Three or More 9’-1” 175 145 122 104 89 78 68 60 54


Notes:
1. Load tables are calculated using section properties based on the steel design thickness
shown in the Steel Deck Institute (SDI) design manual.
2. Loads shown with * 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.

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Type “A” Roof Deck (Narrow Rib)


Type “A” deck is mainly used as a retrofit to match the existing deck. This is due to a lack of efficiency as a whole. Compared to other deck types Type A deck has the lowest strength to weight ratio.

Call 305-760-2575  FOR A FREE QUOTE


Section Properties (Fy=33 ksi)

The tensile strength of sections of steel are represented in kilopound per square inch (ksi)
is a scaled unit derived from psi, equivalent to a thousand psi (1000 lbf/in2).  
 

– Section properties calculated in accordance with AISI specifications


Uniform Total Load in Pounds Per Square Foot (Dead and Live)


We measure uniform live loads as pounds per square foot (psf). The acceptable live load will vary considerably based on the occupancy and expected use of a structure or structural element. For example, the live load for a room in a single family residence will be significantly smaller than the live load for an area of equal size at a movie theatre or sporting event.
 

Notes:
1. Load tables are calculated using section properties based on the steel design thickness
shown in the Steel Deck Institute (SDI) design manual.
2. Loads shown with * 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.