4" Rib

Description

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An industry standard%u2014Ideal for heavy industrial and lagging applications
Available mill finish, clad or painted in .032", .040" and .050" aluminum
Available in 24, 22 & 20 gauge steel, 32" coverage
Panels can be curved
Minimum slope for steel roofing applications is 21/2:12
Standard lengths: 6'-45'
8" Rib available on an inquiry basis

4" Rib Gravity Load Table(Steel)

Ga.	Spans	6'-0"	7'-0"	8'-0"	9'-0"	10'-0"	11'-0"	12'-0"
26	1 & 2	46	34	26	21	NR	NR	NR
26	3	58	43	33	26	NR	NR	NR
24	1 & 2	46	34	26	21	NR	NR	NR
24	3	58	42	32	26	NR	NR	NR
22	1 & 2	62	46	35	28	22	NR	NR
22	3	78	57	44	35	28	25	21
20	1 & 2	77	57	43	34	28	23	NR
20	3	96	71	54	43	35	29	24
18	1 & 2	101	74	57	45	36	30	25
18	3	126	93	71	56	45	38	32

4" Rib Positive Wind Load Table (Alum.)

Thk.	Spans	6'-0"	7'-0"	8'-0"	9'-0"	10'-0"	11'-0"	12'-0"
.032"	1	65	48	37	29	23	NR	NR
.032"	2	56	56	31	25	20	NR	NR
.032"	3	70	70	39	31	25	NR	NR
.040"	1	81	81	45	36	29	24	NR
.040"	2	77	77	43	34	28	23	NR
.040"	3	197	97	54	43	35	29	24
.050"	1	100	100	56	45	36	30	25
.050"	2	103	103	58	46	37	31	26
.050"	3	129	129	73	57	47	38	32

Notes

The allowable loads are based on 1986 AISI and 1986 Aluminum Association specifications.
The allowable loads are based on stress only.
The allowable loads for the steel load table may be increased by 1/3 for wind loading. The allowable loads have been increased for the alumunim load tables by 1/3 for wind loading.
The use of steel 4" Rib panels on roof pitches less than 2 1/2":12 (12 degrees) is not recommended.
The maximum individual panel length for steel 4" Rib on roofs in 32' due to thermal movement considerations.
The use of aluminum 4" Rib panels on roofs is not recommended.

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Specifications

Download the specifications for 4" Rib in Microsoft Word format below:

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Colors

Colors shown will vary based on your monitor type and settings. Actual metal samples are available. Due to product improvements, changes and other factors, FABRAL reserves the right to change or delete information herein without prior notice.

Notes:

1. * Non Standard stock may be subject to extended lead time.

2. Banner Red, Burgundy, Apothecary Blue, Pewter, Bright Silver and Bright Copper are subject to premium pricing.

Gauge

.032"

.040"

.050"

Plain Alum