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Butt Side Rail System Load Table

The load tables are the result of extensive design and testing using the facilities and skills of the Department of Mechanical Engineering at The University of Strathclyde.

Performance

The performance of the systems shown in this document has been derived by calculation in accordance with BS EN1993-1-3: 2006, calibrated and proven by full scale tests. Purlin load tables are valid up to and including 25° roof slopes. For slopes greater than 25 °, use our MetSPEC design software. You can download our MetSPEC software from our downloads centre.

Download our purlin technical manual for more information.

Tables are based on a deflection limit of Span/150 and adopt a cladding weight of 12.5kg/m² on elevation.

Uniform pressure values indicated in BLACK.

Uniform suction values indicated in RED.

Working loads
Section reference
Z & C profile		 Weight
kg/m		 Total
U.D.L.
kg		 Allowable loading in kN/m²
rail centres in mm
1000 1500 1800 2000
SPAN 3.50m
142 Z 13 142 C 13 2.84 10.59 3.03 2.02 1.68 1.51
10.59 3.03 2.02 1.68 1.51
142 Z 14 142 C 14 3.05 11.37 3.25 2.17 1.81 1.62
11.37 3.25 2.17 1.81 1.62
SPAN 4.00m
142 Z 13 142 C 13 2.84 8.11 2.03 1.35 1.13 1.01
8.11 2.03 1.35 1.13 1.01
142 Z 14 142 C 14 3.05 8.71 2.18 1.45 1.21 1.09
8.71 2.18 1.45 1.21 1.09
142 Z 15 142 C 15 3.26 9.30 2.32 1.55 1.29 1.16
9.30 2.32 1.55 1.29 1.16
142 Z 16 142 C 16 3.47 9.89 2.47 1.65 1.37 1.24
9.89 2.47 1.65 1.37 1.24
SPAN 4.50m
142 Z 13 142 C 13 2.84 6.40 1.42 0.95 0.79 0.71
6.40 1.42 0.95 0.79 0.71
142 Z 14 142 C 14 3.05 6.88 1.53 1.02 0.85 0.76
6.88 1.53 1.02 0.85 0.76
142 Z 15 142 C 15 3.26 7.34 1.63 1.09 0.91 0.82
7.34 1.63 1.09 0.91 0.82
172 Z 13 172 C 13 3.25 10.23 2.27 1.52 1.26 1.14
10.23 2.27 1.52 1.26 1.14
172 Z 14 172 C 14 3.49 11.29 2.51 1.67 1.39 1.25
11.29 2.51 1.67 1.39 1.25
172 Z 15 172 C 15 3.73 12.06 2.68 1.79 1.49 1.34
12.06 2.68 1.79 1.49 1.34
172 Z 16 172 C 16 3.98 12.83 2.85 1.90 1.58 1.43
12.83 2.85 1.90 1.58 1.43
SPAN 5.00m
142 Z 13 142 C 13 2.84 5.19 1.04 0.69 0.58 0.52
5.19 1.04 0.69 0.58 0.52
142 Z 14 142 C 14 3.05 5.58 1.12 0.74 0.62 0.56
5.58 1.12 0.74 0.62 0.56
172 Z 13 172 C 13 3.25 8.51 1.70 1.13 0.95 0.85
8.51 1.70 1.13 0.95 0.85
172 Z 14 172 C 14 3.49 9.15 1.83 1.22 1.02 0.91
9.15 1.83 1.22 1.02 0.91
172 Z 15 172 C 15 3.73 9.77 1.95 1.30 1.09 0.98
9.77 1.95 1.30 1.09 0.98
202 Z 14 202 C 14 3.82 12.33 2.47 1.64 1.37 1.23
12.33 2.47 1.64 1.37 1.23
202 Z 15 202 C 15 4.09 13.86 2.77 1.85 1.54 1.39
13.86 2.77 1.85 1.54 1.39
SPAN 5.50m
142 Z 13 142 C 13 2.84 4.29 0.78 0.52 0.43 0.39
4.29 0.78 0.52 0.43 0.39
142 Z 14 142 C 14 3.05 4.60 0.84 0.56 0.47 0.42
4.60 0.84 0.56 0.47 0.42
142 Z 15 142 C 15 3.26 4.92 0.89 0.60 0.50 0.45
4.92 0.89 0.60 0.50 0.45
172 Z 13 172 C 13 3.25 7.03 1.28 0.85 0.71 0.64
7.03 1.28 0.85 0.71 0.64
172 Z 14 172 C 14 3.49 7.56 1.37 0.92 0.76 0.69
7.56 1.37 0.92 0.76 0.69
172 Z 15 172 C 15 3.73 8.07 1.47 0.98 0.82 0.73
8.07 1.47 0.98 0.82 0.73
202 Z 14 202 C 14 3.82 10.99 2.00 1.33 1.11 1.00
10.99 2.00 1.33 1.11 1.00
202 Z 15 202 C 15 4.09 11.75 2.14 1.42 1.19 1.07
11.75 2.14 1.42 1.19 1.07
202 Z 16 202 C 16 4.35 12.51 2.27 1.52 1.26 1.14
12.51 2.27 1.52 1.26 1.14
SPAN 6.00m
172 Z 13 172 C 13 3.25 5.91 0.99 0.66 0.55 0.49
5.91 0.99 0.66 0.55 0.49
172 Z 14 172 C 14 3.49 6.35 1.06 0.71 0.59 0.53
6.35 1.06 0.71 0.59 0.53
172 Z 15 172 C 15 3.73 6.79 1.13 0.75 0.63 0.57
6.79 1.13 0.75 0.63 0.57
202 Z 14 202 C 14 3.82 9.24 1.54 1.03 0.86 0.77
9.24 1.54 1.03 0.86 0.77
202 Z 15 202 C 15 4.09 9.87 1.65 1.10 0.91 0.82
9.87 1.65 1.10 0.91 0.82
202 Z 16 202 C 16 4.35 10.51 1.75 1.17 0.97 0.88
10.51 1.75 1.17 0.97 0.88
232 Z 15 232 C 15 4.44 13.15 2.19 1.46 1.22 1.10
13.15 2.19 1.46 1.22 1.10
232 Z 16 232 C 16 4.73 14.57 2.43 1.62 1.35 1.21
14.57 2.43 1.62 1.35 1.21
172 Z 13 172 C 13 3.25 5.04 0.78 0.52 0.43 0.39
5.04 0.78 0.52 0.43 0.39
172 Z 14 172 C 14 3.49 5.41 0.83 0.55 0.46 0.42
5.41 0.83 0.55 0.46 0.42
172 Z 15 172 C 15 3.73 5.79 0.89 0.59 0.49 0.45
5.79 0.89 0.59 0.49 0.45
202 Z 14 202 C 14 3.82 7.87 1.21 0.81 0.67 0.61
7.87 1.21 0.81 0.67 0.61
202 Z 15 202 C 15 4.09 8.41 1.29 0.86 0.72 0.65
8.41 1.29 0.86 0.72 0.65
202 Z 16 202 C 16 4.35 8.96 1.38 0.92 0.77 0.69
8.96 1.38 0.92 0.77 0.69
232 Z 15 232 C 15 4.44 11.67 1.80 1.20 1.00 0.90
11.67 1.80 1.20 1.00 0.90
232 Z 16 232 C 16 4.73 12.42 1.91 1.27 1.06 0.96
12.42 1.91 1.27 1.06 0.96
232 Z 18 232 C 18 5.30 13.90 2.14 1.43 1.19 1.07
13.90 2.14 1.43 1.19 1.07
SPAN 7.00m
172 Z 13 172 C 13 3.25 4.34 0.62 0.41 0.34 0.31
4.34 0.62 0.41 0.34 0.31
172 Z 14 172 C 14 3.49 4.66 0.67 0.44 0.37 0.33
4.66 0.67 0.44 0.37 0.33
172 Z 15 172 C 15 3.73 4.98 0.71 0.47 0.40 0.36
4.98 0.71 0.47 0.40 0.36
202 Z 14 202 C 14 3.82 6.79 0.97 0.65 0.54 0.49
6.79 0.97 0.65 0.54 0.49
202 Z 15 202 C 15 4.09 7.25 1.04 0.69 0.58 0.52
7.25 1.04 0.69 0.58 0.52
202 Z 16 202 C 16 4.35 7.74 1.11 0.74 0.61 0.55
7.74 1.11 0.74 0.61 0.55
232 Z 15 232 C 15 4.44 10.06 1.44 0.96 0.80 0.72
10.06 1.44 0.96 0.80 0.72
232 Z 16 232 C 16 4.73 10.70 1.53 1.02 0.85 0.76
10.70 1.53 1.02 0.85 0.76
232 Z 18 232 C 18 5.30 11.99 1.71 1.14 0.95 0.86
11.99 1.71 1.14 0.95 0.86
SPAN 7.50m
202 Z 14 202 C 14 3.82 5.91 0.79 0.53 0.44 0.39
5.91 0.79 0.53 0.44 0.39
202 Z 15 202 C 15 4.09 6.32 0.84 0.56 0.47 0.42
6.32 0.84 0.56 0.47 0.42
202 Z 16 202 C 16 4.35 6.73 0.90 0.60 0.50 0.45
6.73 0.90 0.60 0.50 0.45
232 Z 15 232 C 15 4.44 8.76 1.17 0.78 0.65 0.58
8.76 1.17 0.78 0.65 0.58
232 Z 16 232 C 16 4.73 9.32 1.24 0.83 0.69 0.62
9.32 1.24 0.83 0.69 0.62
232 Z 18 232 C 18 5.30 10.44 1.39 0.93 0.77 0.70
10.44 1.39 0.93 0.77 0.70
262 Z 16 262 C 16 5.11 12.47 1.66 1.11 0.92 0.83
12.47 1.66 1.11 0.92 0.83
262 Z 18 262 C 18 5.73 13.97 1.86 1.24 1.03 0.93
13.97 1.86 1.24 1.03 0.93
SPAN 8.00m
232 Z 15 232 C 15 4.44 7.70 0.96 0.64 0.54 0.48
7.70 0.96 0.64 0.54 0.48
232 Z 16 232 C 16 4.73 8.20 1.03 0.68 0.57 0.51
8.20 1.03 0.68 0.57 0.51
232 Z 18 232 C 18 5.30 9.18 1.15 0.76 0.64 0.57
9.18 1.15 0.76 0.64 0.57
232 Z 20 232 C 20 5.87 10.15 1.27 0.85 0.71 0.63
10.15 1.27 0.85 0.71 0.63
262 Z 16 262 C 16 5.11 10.95 1.37 0.91 0.76 0.68
10.95 1.37 0.91 0.76 0.68
262 Z 18 262 C 18 5.73 12.27 1.53 1.02 0.85 0.77
12.27 1.53 1.02 0.85 0.77
262 Z 20 262 C 20 6.34 13.58 1.70 1.13 0.94 0.85
13.58 1.70 1.13 0.94 0.85
SPAN 8.50m
232 Z 15 232 C 15 4.44 6.83 0.80 0.54 0.45 0.40
6.83 0.80 0.54 0.45 0.40
232 Z 16 232 C 16 4.73 7.26 0.85 0.57 0.47 0.43
7.26 0.85 0.57 0.47 0.43
232 Z 18 232 C 18 5.30 8.13 0.96 0.64 0.53 0.48
8.13 0.96 0.64 0.53 0.48
232 Z 20 232 C 20 5.87 8.99 1.06 0.71 0.59 0.53
8.99 1.06 0.71 0.59 0.53
262 Z 16 262 C 16 5.11 9.71 1.14 0.76 0.63 0.57
9.71 1.14 0.76 0.63 0.57
262 Z 18 262 C 18 5.73 10.87 1.28 0.85 0.71 0.64
10.87 1.28 0.85 0.71 0.64
262 Z 20 262 C 20 6.34 12.03 1.42 0.94 0.79 0.71
12.03 1.42 0.94 0.79 0.71
262 Z 23 262 C 23 7.26 13.74 1.62 1.08 0.90 0.81
13.74 1.62 1.08 0.90 0.81
262 Z 25 262 C 25 7.86 14.88 1.75 1.17 0.97 0.88
14.88 1.75 1.17 0.97 0.88
SPAN 9.00m
232 Z 15 232 C 15 4.44 6.08 0.68 0.45 0.38 0.34
6.08 0.68 0.45 0.38 0.34
232 Z 16 232 C 16 4.73 6.48 0.72 0.48 0.40 0.36
6.48 0.72 0.48 0.40 0.36
232 Z 18 232 C 18 5.30 7.25 0.81 0.54 0.45 0.40
7.25 0.81 0.54 0.45 0.40
232 Z 20 232 C 20 5.87 8.02 0.89 0.59 0.50 0.45
8.02 0.89 0.59 0.50 0.45
262 Z 16 262 C 16 5.11 8.66 0.96 0.64 0.53 0.48
8.66 0.96 0.64 0.53 0.48
262 Z 18 262 C 18 5.73 9.69 1.08 0.72 0.60 0.54
9.69 1.08 0.72 0.60 0.54
262 Z 20 262 C 20 6.34 10.73 1.19 0.79 0.66 0.60
10.73 1.19 0.79 0.66 0.60
262 Z 23 262 C 23 7.26 12.26 1.36 0.91 0.76 0.68
12.26 1.36 0.91 0.76 0.68
302 Z 20 302 C 20 7.86 18.50 2.06 1.37 1.14 1.03
18.50 2.06 1.37 1.14 1.03
302 Z 23 302 C 23 9.01 21.16 2.35 1.57 1.31 1.18
21.16 2.35 1.57 1.31 1.18
SPAN 9.50m
262 Z 16 262 C 16 5.11 7.77 0.82 0.55 0.45 0.41
7.77 0.82 0.55 0.45 0.41
262 Z 18 262 C 18 5.73 8.70 0.92 0.61 0.51 0.46
8.70 0.92 0.61 0.51 0.46
262 Z 20 262 C 20 6.34 9.63 1.01 0.68 0.56 0.51
9.63 1.01 0.68 0.56 0.51
262 Z 23 262 C 23 7.26 11.00 1.16 0.77 0.64 0.58
11.00 1.16 0.77 0.64 0.58
302 Z 20 302 C 20 7.86 16.60 1.75 1.16 0.97 0.87
16.60 1.75 1.16 0.97 0.87
302 Z 23 302 C 23 9.01 18.99 2.00 1.33 1.11 1.00
18.99 2.00 1.33 1.11 1.00
302 Z 25 302 C 25 9.76 20.58 2.17 1.44 1.20 1.08
20.58 2.17 1.44 1.20 1.08
SPAN 10.00m
262 Z 16 262 C 16 5.11 7.01 0.70 0.47 0.39 0.35
6.93 0.69 0.46 0.38 0.35
262 Z 18 262 C 18 5.73 7.85 0.79 0.52 0.44 0.39
7.76 0.78 0.52 0.43 0.39
262 Z 20 262 C 20 6.34 8.69 0.87 0.58 0.48 0.43
8.53 0.85 0.57 0.47 0.43
302 Z 20 302 C 20 7.86 14.98 1.50 1.00 0.83 0.75
14.98 1.50 1.00 0.83 0.75
302 Z 23 302 C 23 9.01 17.14 1.71 1.14 0.95 0.86
17.14 1.71 0.14 0.95 0.86
302 Z 25 302 C 25 9.76 18.57 1.86 1.24 1.03 0.93
18.57 1.86 1.24 1.03 0.93
342 Z 23 342 C 23 9.73 23.04 2.30 1.54 1.28 1.15
23.04 2.30 1.54 1.28 1.15
342 Z 25 342 C 25 10.55 24.96 2.50 1.66 1.39 1.25
24.96 2.50 1.66 1.39 1.25
SPAN 10.50m
262 Z 25 262 C 25 7.86 9.75 0.93 0.62 0.52 0.46
9.75 0.93 0.62 0.52 0.46
302 Z 20 302 C 20 7.86 13.59 1.29 0.86 0.72 0.65
13.59 1.29 0.86 0.72 0.65
302 Z 23 302 C 23 9.01 15.55 1.48 0.99 0.82 0.74
15.55 1.48 0.99 0.82 0.74
302 Z 25 302 C 25 9.76 16.84 1.60 1.07 0.89 0.80
16.84 1.60 1.07 0.89 0.80
342 Z 23 342 C 23 9.73 20.90 1.99 1.33 1.11 1.00
20.90 1.99 1.33 1.11 1.00
342 Z 25 342 C 25 10.55 22.64 2.16 1.44 1.20 1.08
22.64 2.16 1.44 1.20 1.08
SPAN 11.00m
302 Z 20 302 C 20 7.86 12.39 1.13 0.75 0.63 0.56
12.39 1.13 0.75 0.63 0.56
302 Z 23 302 C 23 9.01 14.17 1.29 0.86 0.72 0.64
14.17 1.29 0.86 0.72 0.64
302 Z 25 302 C 25 9.76 15.35 1.40 0.93 0.78 0.70
15.35 1.40 0.93 0.78 0.70
342 Z 23 342 C 23 9.73 19.04 1.73 1.15 0.96 0.87
19.04 1.73 1.15 0.96 0.87
342 Z 25 342 C 25 10.55 20.63 1.88 1.25 1.04 0.94
20.63 1.88 1.25 1.04 0.94
342 Z 27 342 C 27 11.37 22.21 2.02 1.35 1.12 1.01
22.21 2.02 1.35 1.12 1.01
342 Z 30 342 C 30 12.58 24.55 2.23 1.49 1.24 1.12
24.55 2.23 1.49 1.24 1.12
SPAN 11.50m
302 Z 23 302 C 23 9.01 12.96 1.13 0.75 0.63 0.56
12.96 1.13 0.75 0.63 0.56
302 Z 25 302 C 25 9.76 14.04 1.22 0.81 0.68 0.61
14.04 1.22 0.81 0.68 0.61
342 Z 23 342 C 23 9.73 17.42 1.52 1.01 0.84 0.76
17.42 1.52 1.01 0.84 0.76
342 Z 25 342 C 25 10.55 18.87 1.64 1.09 0.91 0.82
18.87 1.64 1.09 0.91 0.82
342 Z 27 342 C 27 11.37 20.32 1.77 1.19 0.98 0.88
20.32 1.77 1.19 0.98 0.88
342 Z 30 342 C 30 12.58 22.47 1.95 1.30 1.09 0.98
22.47 1.95 1.30 1.09 0.98
SPAN 12.00m
302 Z 25 302 C 25 9.76 12.89 1.07 0.72 0.60 0.54
12.89 1.07 0.72 0.60 0.54
342 Z 23 342 C 23 9.73 16.00 1.33 0.89 0.74 0.67
16.00 1.33 0.89 0.74 0.67
342 Z 25 342 C 25 10.55 17.33 1.44 0.96 0.80 0.72
17.33 1.44 0.96 0.80 0.72
342 Z 27 342 C 27 11.37 18.66 1.56 1.04 0.86 0.78
18.66 1.56 1.04 0.86 0.78

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