Type N Deck

Long Span Metal Deck

The 3" depth allows for longer spans not possible with lesser depth profiles. The increased span capability allows the use of a lighter gauge, which can prove to be cost effective. Also, because of its long span capability, the use of the N Decking will minimize support requirements. The narrow spacing between the ribs of the N Deck allows for rigid insulation or pouring concrete. The load carrying capabilities of the N Deck generally surpass that of other long span metal decks. N Deck is available in stainless steel, both T304 and T316, and is suited for caustic environments. It is also available in galvanized and prime painted steel.

SECTION PROPERTIES (Fy=33 ksi)
Gage Design Thickness Weight (psf) Ptd Weight (psf) Galv Ip (In4) In (In4) Sp (In3) Sn (In3)
22 0.0295 2.01 2.05 0.6152 0.8158 0.3604 0.4129
20 0.0358 2.58 2.65 0.7921 1.0216 0.4748 0.5311
18 0.0474 3.20 3.40 1.1625 1.3695 0.7027 0.7502
16 0.0598 4.10 4.25 1.5909 1.7448 0.9132 0.958
14 0.0747 5.12 5.35 2.126 2.186 1.1704 1.2091
12 0.1046 7.17 7.40 3.0732 3.0732 1.6874 1.6923
Section Properties calculated in accordance with AISI specifications.
Gage SpanCond Max SDI
Const Sp
Uniform Total Load in Pounds Per Square Foot (Dead and Live)
9'-0" 9'-6" 10'-0" 10'-6" 11'-0" 11'-6" 12'-0" 12'-6" 13'-0" 13'-6" 14'-0"
22
One
11’-3” 57 51 46 42 38 35 32



20 12’-9” 76 68 61 55 49 44 40 36 33 31
18 15’-5” 111 98 85 75 67 59 53 48 44 40 37
16 18’-0” 145 130 113 99 88 78 70 63 57 52 47
14 20’-10” 187 168 148 129 114 101 90 81 73 66 60
12 25’-0”


183 160 141 125 112 101 91 83
22
Two
13’-3” 70 62 56 51 46 42 39 36 33 31
20 15’-0” 88 79 71 64 59 54 49 45 42 39 36
18 18’-2” 122 109 98 89 81 74 68 63 58 54 50
16 22’-0” 155 139 125 114 103 95 87 80 74 68 64
14 24’-7” 194 174 157 143 130 119 109 101 93 86 80
12 29’-6”


199 182 166 153 141 130 120 112
22
Three or More
13’-3” 87 78 70 64 58 53 49 45 42 38 36
20 15’-0” 110 99 89 81 73 67 62 57 52 49 45
18 18’-2” 152 136 123 112 102 93 85 79 73 67 62
16 22’-0” 194 174 157 142 129 118 109 100 93 86 80
14 24’-7”

197 178 163 149 137 126 116 108 100
12 29’-6”





191 176 162 151 140

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