Type “B” Roof Deck (Wide Rib)

The B-Deck is a corrugated sheet made from galvanized steel for roofing, flooring, and siding applications. Its sleek design makes it ideal for covering industrial plants, large commercial developments, warehouses and more.

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Absorption Coefficients

The absorption coefficient is a representative term for determining how far
incident light of a certain wavelength penetrates a material before being absorbed. 

						NRC
125	250	500	1000	2000	4000
.14	.19	.45	.92	.54	.31	.55

Section Properties (Fy = 40 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).

Gage	Thickness	Weight (psf)	As(In2)	Ip(In4)	In(In4	Sp(In3)	Sn(In3)	Allowable Moment Mp/Ω Inch-lbs	Allowable Moment Mn/Ω Inch-lbs	Allowable Shear Vn/Ω lbs
22	0.0295	1.61	0.485	0.1500	0.1833	0.1744	0.1796	4177	4300	2243
20	0.0358	2.04	0.588	0.1933	0.2267	0.2228	0.2309	5337	5533	2714
18	0.0474	2.70	0.778	0.2833	0.3000	0.3037	0.3147	7270	7540	3572
16	0.0598	3.20	0.982	0.3800	0.3800	0.3900	0.3957	9340	9477	4479

Notes:
1. All section properties and strengths are reported per foot of panel width.
2. All section properties and ASD flexural strengths are calculated in accordance with ANSI/SDI RD-2010,
Section 2.4.A.1.3; p = Property in positive bending; n = Property in negative bending.
3. Moments of Inertia are calculated at 0.60Fy

 

ASD Allowable Uniform Downward Loads (psf) / Uniform Service Load that Causes L/240 Deflection (psf)

AISC’s Allowable Strength Design applies a quasi-safety factor approach to evaluating allowable strength. Ultimate strength of an element or member is determined in the same manner regardless of the load combination method considered. Design load combination effects are determined in a manner appropriate to the intended form of the analysis results. ASD load combinations are compared to the ultimate strength reduced by a factor (omega) which provides a mathematical form similar to Allowable Stress Design resolved with a safety factor.
 

Gage	Span Cond	ASD Span	5’-0”	5’-6"	6’-0”	6’-6”	7’-0”	7’-6”	8’-0”	8’-6”	” 9’-0”	9’-6”	10’-0”	ASD Cantilever Span
22	Single	7’-0”	111 / 79	92 / 59	77 / 46	66 / 36	57 / 29	50 / 23	44 / 19	39 / 16	34 / 14	31 / 11	28 / 10	1’9”
20	Single	8’-11”	142 / 102	118 / 76	99 / 59	84 / 46	73 / 37	63 / 30	56 / 25	49 / 21	44 / 17	39 / 15	36 / 13	2’3”
18	Single	12’-1”	194 / 149 1	160 / 112	135 / 86	115 / 68	8 99 / 54	86 / 44	76 / 36	67 / 30	60 / 26	54 / 22	48 / 19	3’1”
16	Single	15’-7”	249 / 200	206 / 150	173 / 116	147 / 91	127 / 73	111 / 59	97 / 49	86 / 41	77 / 34	69 / 29	62 / 25	3’11”
22	Double	8’-7”	115 / 190	95 / 143	80 / 110	68 / 86	59 / 69	51 / 56	45 / 46	40 / 39	35 / 33	32 / 28	29 / 24	1’9”
20	Double	10’-11”	148 / 244	122 / 184	102 / 141	87 / 111	75 / 89	66 / 72	58 / 60	51 / 50	46 / 42	41 / 36	37 / 31	2’3”
18	Double	14’-11”	201 / 358	166 / 269	140 / 207	119 / 163	103 / 131	89 / 106	79 / 87	70 / 73	62 / 61	56 / 52	50 / 45	3’1”
16	Double	19’-2”	253 / 481	209 / 361	176 / 278	150 / 219	129 / 175	112 / 142	99 / 117	87 / 98	78 / 82	70 / 70	63 / 60	3’11”
22	Triple	8’-7”	143 / 148	118 / 112	100 / 86	85 / 68	73 / 54	64 / 44	56 / 36	50 / 30	44 / 25	40 / 22	36 / 19	1’9”
20	Triple	10’-11”	184 / 191	152 / 144 1	128 / 111	109 / 87	94 / 70	82 / 57	72 / 47	64 / 39	57 / 33	51 / 28	46 / 24	2’3”
18	Triple	14’-11”	251 / 280	208 / 211	1 175 / 162	149 / 128	128 / 102	112 / 83	98 / 68	87 / 57	78 / 48	70 / 41	63 / 35	3’1”
16	Triple	19’-2”	316 / 376	261 / 283	219 / 218	187 / 171	161 / 137	140 / 111	123 / 92	109 / 77	98 / 64	88 / 55	79 / 47	3’11”

Notes: 1. Construction Spans (ANSI/SDI RD-2010 Section 2.4.A.3 and 2.4.A.4)