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Home > Industrial > Exposed Fastener > 4" Rib
4" Rib Metal Roofing
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steel and aluminum profile widths, click here.
- An industry standard—Ideal 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°) 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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