Cor-Rib

Our Cor-Rib roofing and siding panels are typically used for roofing, siding, custom trailers, railcars and other architectural applications.

Notes

  1. An asterisk (*) indicates allowable stress has been reached.
  2. A strikethrough (100) indicates less than 10 small PSF ASCE minimum.
  3. For structural roofing & siding made of formed metal sheets, a total load deflection shall not exceed L/60.
  4. Refer to Table 1604.3 limits and footnotes of the International Building Code (IBC) for additional guidance.
  5. Allowable spans and loads DO include self-weight of panel.
  6. All values are for one foot of panel width unless noted otherwise.
  1. Yield stress = Fy = 33,000 PSI.
  2. Loads and spans for carbon steel are based on AISI Standard for Design of Cold-Formed Steel Structure Members (2007 Edition).
  1. Yield stress = Fcy = 13,000 PSI.
  2. Loads and spans for aluminum are based on Aluminum Design Manual (January 2005).

Resources

PRODUCT CHARACTERISTICS

LOAD TABLE

Section Weight Total Cross-Sectional

Area A (in2)

 Allowable Stress

Fa (psi)

 Top Flat in Compression Bottom Flat in Compression
Sheet

lb/ft

 Area

lb/sf

 Moment of Inertia

I (in4/ft)

 Section Modulus

S (in3/ft)

 Allowable Moment

Ma (lb-ft/ft)

 Moment of Inertia

I (in4/ft)

 Section Modulus

S (in3/ft)

 Allowable Moment

Ma (lb-ft/ft)
18 Ga 7.81 2.31 2.30 19760 0.029 0.103 170 0.029 0.105 174
20 Ga 6.25 1.85 1.84 19760 0.023 0.084 138 0.023 0.086 142
22 Ga 4.84 1.44 1.42 19760 0.018 0.066 108 0.018 0.068 112
24 Ga 4.22 1.25 1.24 19760 0.016 0.058 95 0.016 0.060 98
26 Ga 3.44 1.02 1.01 19760 0.013 0.047 78 0.013 0.049 81
0.02 Alum 1.09 0.32 0.92 8069 0.012 0.043 30 0.012 0.045 30
0.024 Alum 1.30 0.39 1.10 8403 0.014 0.051 37 0.014 0.053 37
0.032 Alum 1.74 0.52 1.47 8500 0.019 0.068 49 0.019 0.070 49

TABLE 1: APPLIED LOAD (PSF)

An asterisk (*) indicates allowable stress has been reached.

Table 1 Applied Load (PSF)
Allowable Spans 10 20 30 40 50 60
Section Span Limit Span Type Allowable Spans (ft)
18 Ga L/60 1 Span 8′-6″ 7′-0″ 6′-2″ 5′-8″ 5′-1″ * 4′-8″ *
2 Span 9′-7″ 7′-10″ 6′-7″ * 5′-9″ * 5′-2″ * 4′-9″ *
3 Span 9′-4″ 7′-8″ 6′-9″ 5′-11″ * 5′-4″ * 4′-11″ *
L/240 1 Span 5′-4″ 4′-5″ 3′-11″ 3′-7″ 3′-4″ 3′-1″
2 Span 6′-0″ 4′-11″ 4′-4″ 4′-0″ 3′-9″ 3′-6″
3 Span 5′-10″ 4′-10″ 4′-3″ 3′-11″ 3′-7″ 3′-5″
20 Ga L/60 1 Span 8′-0″ 6′-6″ 5′-9″ 5′-2″ * 4′-7″ * 4′-3″ *
2 Span 9′-0″ 7′-2″ * 6′-0″ * 5′-2″ * 4′-8″ * 4′-3″ *
3 Span 8′-9″ 7′-2″ 6′-2″ * 5′-5″ * 4′-10″ * 4′-5″ *
L/240 1 Span 5′-0″ 4′-1″ 3′-7″ 3′-4″ 3′-1″ 2′-11″
2 Span 5′-8″ 4′-7″ 4′-1″ 3′-9″ 3′-5″ 3′-3″
3 Span 5′-6″ 4′-6″ 4′-0″ 3′-7″ 3′-4″ 3′-2″
22 Ga L/60 1 Span 7′-5″ 6′-0″ 5′-3″ * 4′-7″ * 4′-1″ * 3′-9″ *
2 Span 8′-4″ 6′-5″ * 5′-4″ * 4′-8″ * 4′-2″ * 3′-10″ *
3 Span 8′-2″ 6′-7″ 5′-6″ * 4′-10″ * 4′-4″ * 3′-11″ *
L/240 1 Span 4′-8″ 3′-10″ 3′-4″ 3′-1″ 2′-10″ 2′-8″
2 Span 5′-3″ 4′-3″ 3′-9″ 3′-5″ 3′-2″ 3′-0″
3 Span 5′-1″ 4′-2″ 3′-8″ 3′-4″ 3′-1″ 2′-11″
24 Ga L/60 1 Span 7′-2″ 5′-9″ 4′-11″ * 4′-4″ * 3′-10″ * 3′-6″ *
2 Span 8′-0″ 6′-1″ * 5′-0″ * 4′-4″ * 3′-11″ * 3′-7″ *
3 Span 7′-10″ 6′-3″ * 5′-2″ * 4′-6″ * 4′-1″ * 3′-8″ *
L/240 1 Span 4′-6″ 3′-8″ 3′-2″ 2′-11″ 2′-8″ 2′-7″
2 Span 5′-0″ 4′-1″ 3′-7″ 3′-3″ 3′-0″ 2′-10″
3 Span 4′-11″ 4′-0″ 3′-6″ 3′-2″ 3′-0″ 2′-10″
26 Ga L/60 1 Span 4′-10″ * 2′-10″ * 2′-4″ * 2′-1″ * 1′-10″ * 1′-8″ *
2 Span 4′-10″ * 2′-10″ * 2′-4″ * 2′-1″ * 1′-10″ * 1′-8″ *
3 Span 4′-1″ * 3′-0″ * 2′-5″ * 2′-1″ * 1′-11″ * 1′-9″ *
L/240 1 Span 3′-0″ 2′-5″ 2′-1″ 1′-11″ 1′-9″ 1′-8″
2 Span 3′-4″ 2′-8″ 2′-4″ 2′-1″ * 1′-10″ * 1′-8″ *
3 Span 3′-3″ 2′-7″ 2′-4″ 2′-1″ 1′-11″ 1′-9″ *
0.02 Alum L/60 1 Span 4′-8″ 3′-5″ * 2′-9″ * 2′-5″ * 2′-2″ * 2′-0″ *
2 Span 4′-10″ * 3′-5″ * 2′-10″ * 2′-5″ * 2′-2″ * 2′-0″ *
3 Span 5′-0″ * 3′-7″ * 2′-11″ * 2′-6″ * 2′-3″ * 2′-1″ *
L/240 1 Span 2′-11″ 2′-4″ 2′-1″ 1′-10″ 1′-9″ 1′-8″
2 Span 3′-4″ 2′-8″ 2′-4″ 2′-1″ 1′-11″ 1′-10″
3 Span 3′-3″ 2′-7″ 2′-3″ 2′-1″ 1′-11″ 1′-9″
0.024 Alum L/60 1 Span 4′-11″ 3′-9″ * 3′-1″ * 2′-8″ * 2′-5″ * 2′-2″ *
2 Span 5′-4″ * 3′-10″ * 3′-2″ * 2′-9″ * 2′-5″ * 2′-3″ *
3 Span 5′-5″ 3′-11″ * 3′-3″ * 2′-10″ * 2′-6″ * 2′-4″ *
L/240 1 Span 3′-1″ 2′-6″ 2′-2″ 2′-0″ 1′-10″ 1′-9″
2 Span 3′-6″ 2′-10″ 2′-5″ 2′-3″ 2′-1″ 1′-11″
3 Span 3′-5″ 2′-9″ 2′-5″ 2′-2″ 2′-0″ 1′-11″
0.032 Alum L/60 1 Span 5′-5″ 4′-4″ * 3′-7″ * 3′-1″ * 2′-9″ * 2′-6″ *
2 Span 6′-1″ 4′-5″ * 3′-7″ * 3′-1″ * 2′-10″ * 2′-7″ *
3 Span 5′-11″ 4′-6″ * 3′-9″ * 3′-3″ * 2′-11″ * 2′-8″ *
L/240 1 Span 3′-5″ 2′-9″ 2′-5″ 2′-2″ 2′-0″ 1′-11″
2 Span 3′-10″ 3′-1″ 2′-8″ 2′-5″ 2′-3″ 2′-2″
3 Span 3′-9″ 3′-0″ 2′-8″ 2′-5″ 2′-3″ 2′-1″

TABLE 2: TRIAL SPAN (FT)

An asterisk (*) indicates allowable stress has been reached.

A strikethrough (100) indicates less than 10 small PSF ASCE minimum.

Table 2 Trial Span (ft)
Allowable Loads 3 4 5 6 7 8 9 10 11 12
Section Span Limit Span Type Allowable Loads (PSF)
18 Ga L/60 1 Span 148 * 82 * 52 * 32 19 12 8 5 3 2
2 Span 152 * 84 * 53 * 36 * 26 * 18 12 8 5 3
3 Span 162 * 90 * 57 * 38 * 26 17 11 7 5 3
L/240 1 Span 67 27 12 6 3 1 0 1 1 2
2 Span 96 39 19 10 5 2 1 0 1 1
3 Span 89 36 17 9 4 2 1 0 1 1
20 Ga L/60 1 Span 120 * 67 * 42 * 26 15 9 6 4 2 1
2 Span 124 * 68 * 43 * 29 * 21 * 14 9 6 4 3
3 Span 132 * 73 * 46 * 31 * 21 13 9 6 4 2
L/240 1 Span 54 21 10 5 2 1 0 1 1 1
2 Span 77 31 15 8 4 2 1 0 1 1
3 Span 71 29 14 7 3 2 0 0 1 1
22 Ga L/60 1 Span 94 * 52 * 33 * 20 12 7 4 3 2 1
2 Span 97 * 54 * 34 * 23 * 16 * 11 7 5 3 2
3 Span 104 * 58 * 36 * 25 * 16 10 6 4 3 2
L/240 1 Span 41 16 7 3 1 0 0 1 1 1
2 Span 59 24 11 6 3 1 0 0 1 1
3 Span 55 22 10 5 3 1 0 0 1 1
24 Ga L/60 1 Span 83 * 46 * 29 * 17 10 6 4 2 1 1
2 Span 85 * 47 * 30 * 20 * 14 * 9 6 4 3 2
3 Span 91 * 51 * 32 * 22 * 14 9 6 4 2 1
L/240 1 Span 36 14 6 3 1 0 0 1 1 1
2 Span 52 21 10 5 2 1 0 0 1 1
3 Span 48 19 9 4 2 1 0 0 1 1
0.26 Ga L/60 1 Span 18 * 9 * 5 * 3 * 2 1 0 0 1 1
2 Span 18 * 9 * 5 * 3 * 2 * 1 * 1 * 0 0 1
3 Span 19 * 10 * 6 * 4 * 2 * 1 * 1 0 0 1
L/240 1 Span 9 3 1 0 1 1 1 1 1 1
2 Span 14 5 2 0 0 1 1 1 1 1
3 Span 13 4 2 0 0 1 1 1 1 1
0.02 Alum L/60 1 Span 25 * 14 * 8 4 2 1 1 0 0 0
2 Span 26 * 14 * 9 * 6 * 4 2 1 1 0 0
3 Span 28 * 15 * 9 * 6 3 2 1 1 0 0
L/240 1 Span 9 3 1 0 0 0 0 1 1 1
2 Span 13 5 2 1 0 0 0 0 1 1
3 Span 12 5 2 1 0 0 0 0 1 1
0.024 Alum L/60 1 Span 31 * 17 * 9 5 3 2 1 0 0 0
2 Span 32 * 18 * 11 * 7 4 3 2 1 0 0
3 Span 34 * 19 * 12 * 7 4 2 1 1 0 0
L/240 1 Span 11 4 2 1 0 0 0 1 1 1
2 Span 16 6 3 1 0 0 0 0 1 1
3 Span 14 6 2 1 0 0 0 0 1 1
0.032 Alum L/60 1 Span 42 * 23 * 12 7 4 2 1 1 0 0
2 Span 43 * 24 * 15 * 10 * 6 4 2 1 1 0
3 Span 46 * 25 * 16 * 9 5 3 2 1 1 0
L/240 1 Span 15 6 2 1 0 0 0 1 1 1
2 Span 21 8 4 2 1 0 0 0 1 1
3 Span 19 8 3 2 1 0 0 0 1 1

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