Type “A” Roof Deck (Narrow Rib)

Rated 2.00 out of 5 based on 1 customer rating
(1 customer review)

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.

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Description

Type “A” Roof Deck (Narrow Rib)

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

Section Properties (Fy=33 ksi)

GageDesign ThicknessWeight (psf) PtdWeight (psf) GalvIp(In4) In(In4)Sp(In3)Sn(In3)
22.02951.65 1.700.14630.14630.1280.1297
20.0358 2.09 2.150.17790.1779 0.15640.1574
18.04742.71 2.800.23660.23660.20830.2083
16.05983.30 3.400.29980.29980.26270.2627

– Section properties calculated in accordance with AISI specifications

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

GageSpan CondMax SDI Const SP 4’-0”4’-6” 5’-0”5’-66’-0”6’-6 7’-0” 7’-6”8’-0”” 8’-6”9’-0”
22One 5’-5”10885695748413530
20One6’-0”131104846958494337* 32*
18One 6’-11”174137111927765*54*46*39*34*30*
16One7’-9”1731401169780*66*55*47*41*36*
22Two6’-4”10885695748403530
20Two7’-0”13110384695849423732
18Two8’-1”1741371119277665649433834
16Two9’-1”17314011697837162544843
22Three or More6’-4”13510686716051443833
20Three or More7’-0”1641291058673625346413632
18Three or More8’-1”172139 11596827162544843
16Three or More9’-1” 1751451221048978686054

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.

1 review for Type “A” Roof Deck (Narrow Rib)

  1. Rated 2 out of 5

    jhartman

    Compared to other deck types Type A deck has the lowest strength to weight ratio.

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