Purlins Load Tables

Heavy End Bay Purlin System Load Table

The load tables contained in this document 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.

Section Reference Weight kg/m Working Loads in kN/span Ultimate U.D.L. in kN/span
Down U.D.L. Deflection Span/180 Down U.D.L. Uplift – Metal Cladding. Number of Anti Sag Rods
0 1 2
End bay Inner bay End bay Inner bay End bay Inner bay End bay Inner bay End bay Inner bay End bay Inner bay
Span 4.50m
142.Z.13 2.84 13.24 16.24 21.36 13.09 21.36 21.36
142.Z.14 3.05 9.86 14.94 9.86 17.45 17.55 24.09 10.42 14.30 17.55 24.09 17.55 24.09
142.Z.15 3.26 10.52 16.66 10.52 18.62 19.57 26.86 11.27 15.47 19.57 26.86 19.57 26.86
142.Z.16 3.47 11.19 18.38 11.19 19.81 21.58 29.62 12.09 16.59 21.58 29.62 21.58 29.62
142.Z.18 3.89 12.52 12.52 25.52 13.64 25.52 25.52
142.Z.20 4.30 13.82 13.82 29.28 15.00 29.28 29.28
Span 5.00m
142.Z.13 2.84 11.89 14.02 19.22 11.32 19.22 19.22
142.Z.14 3.05 8.12 13.42 8.12 15.06 15.80 21.68 9.02 12.38 15.80 21.68 15.80 21.68
142.Z.15 3.26 8.67 14.97 8.67 16.08 17.61 24.17 9.77 13.41 17.61 24.17 17.61 24.17
142.Z.16 3.47 9.22 16.51 9.22 17.10 19.42 26.66 10.48 14.39 19.42 26.66 19.42 26.66
142.Z.18 3.89 10.31 10.31 22.96 11.83 22.96 22.96
142.Z.20 4.30 11.39 11.39 26.35 13.00 26.35 26.35
172.Z.13 3.25 14.85 21.73 23.99 13.02 23.99 23.99
172.Z.14 3.49 12.23 16.85 13.14 23.34 19.81 27.19 10.39 14.26 19.81 27.19 19.81 27.19
172.Z.15 3.73 13.71 18.87 14.04 24.94 22.19 30.45 11.26 15.45 22.19 30.45 22.19 30.45
172.Z.16 3.98 14.93 20.92 14.93 26.53 24.59 33.75 12.10 16.61 24.59 33.75 24.59 33.75
172.Z.18 4.45 16.70 25.02 16.70 29.68 29.38 40.33 13.69 18.79 29.38 40.33 29.38 40.33
172.Z.20 4.93 18.46 18.46 34.05 15.14 34.05 34.05
Span 5.50m
142.Z.13 2.84 10.79 12.21 17.47 9.98 17.47 17.47
142.Z.14 3.05 6.79 12.18 6.79 13.11 14.36 19.71 7.96 10.92 14.36 19.71 14.36 19.71
142.Z.15 3.26 7.25 13.58 7.25 14.00 16.01 21.98 8.62 11.83 16.01 21.98 16.01 21.98
142.Z.16 3.47 7.71 7.71 17.66 9.25 17.66 17.66
142.Z.18 3.89 8.62 8.62 20.88 10.43 20.88 20.88
142.Z.20 4.30 9.52 9.52 23.95 11.47 23.95 23.95
172.Z.13 3.25 13.48 19.02 21.81 11.35 21.81 21.81
172.Z.14 3.49 11.03 15.29 11.03 20.43 18.01 24.72 9.06 12.44 18.01 24.72 18.01 24.72
172.Z.15 3.73 11.78 17.13 11.78 21.83 20.17 27.69 9.83 13.49 20.17 27.69 20.17 27.69
172.Z.16 3.98 12.53 18.99 12.53 23.23 22.35 30.68 10.58 14.52 22.35 30.68 22.35 30.68
172.Z.18 4.45 14.02 22.70 14.02 25.98 26.71 36.66 11.97 16.43 26.71 36.66 26.71 36.66
172.Z.20 4.93 15.50 15.50 30.96 13.24 30.96 30.96
Span 6.00m
172.Z.13 3.25 12.33 16.77 19.99 10.06 19.99 19.99
172.Z.14 3.49 9.37 13.98 9.37 18.01 16.51 22.66 8.04 11.04 16.51 22.66 16.51 22.66
172.Z.15 3.73 10.01 15.67 10.01 19.25 18.49 25.38 8.73 11.98 18.49 25.38 18.49 25.38
172.Z.16 3.98 10.65 17.37 10.65 20.48 20.49 28.13 9.40 12.90 20.49 28.13 20.49 28.13
172.Z.18 4.45 11.91 20.78 11.91 22.90 24.49 33.61 10.64 14.60 24.49 33.61 24.49 33.61
172.Z.20 4.93 13.17 24.09 13.17 25.31 28.38 38.95 11.76 16.15 28.38 38.95 28.38 38.95
172.Z.23 5.63 15.02 15.02 33.92 13.28 33.92 33.92
172.Z.25 6.09 16.23 16.23 37.44 14.18 37.44 37.44
202.Z.14 3.82 16.59 25.08 26.86 10.96 26.86 26.86
202.Z.15 4.09 13.52 18.64 14.43 26.81 21.97 30.16 8.68 11.91 21.97 30.16 21.97 30.16
202.Z.16 4.35 15.03 20.71 15.36 28.53 24.40 33.49 9.35 12.83 24.40 33.49 24.40 33.49
202.Z.18 4.88 17.19 24.83 17.19 31.94 29.24 40.14 10.61 14.57 28.44 39.03 29.24 40.14
202.Z.20 5.40 19.01 19.01 33.97 11.77 31.61 33.97
202.Z.23 6.17 21.70 21.70 40.77 13.33 35.82 40.77
202.Z.27 7.19 25.22 25.22 49.35 15.15 40.66 49.12
Span 6.50m
172.Z.13 3.25 11.35 14.87 18.45 9.04 18.45 18.45
172.Z.14 3.49 8.04 12.88 8.04 15.97 15.24 20.92 7.23 9.92 15.24 20.92 15.24 20.92
172.Z.15 3.73 8.59 14.43 8.59 17.07 17.07 23.43 7.85 10.77 17.07 23.43 17.07 23.43
172.Z.16 3.98 9.14 16.00 9.14 18.16 18.91 25.96 8.45 11.60 18.91 25.96 18.91 25.96
172.Z.18 4.45 10.23 19.14 10.23 20.31 22.60 31.02 9.57 13.13 22.60 31.02 22.60 31.02
172.Z.20 4.93 11.30 11.30 26.19 10.58 26.19 26.19
172.Z.23 5.63 12.89 12.89 31.31 11.93 31.31 31.31
172.Z.25 6.09 13.93 13.93 34.56 12.74 34.56 34.56
202.Z.14 3.82 15.28 22.33 24.79 9.80 24.79 24.79
202.Z.15 4.09 12.42 17.17 12.42 23.87 20.28 27.84 7.77 10.66 20.28 27.84 20.28 27.84
202.Z.16 4.35 13.22 19.08 13.22 25.41 22.52 30.91 8.37 11.49 22.52 30.91 22.52 30.91
202.Z.18 4.88 14.80 22.88 14.80 28.44 26.99 37.05 9.51 13.05 26.34 36.15 26.99 37.05
202.Z.20 5.40 16.36 16.36 31.36 10.55 29.27 31.36
202.Z.23 6.17 18.68 18.68 37.63 11.94 33.15 37.63
202.Z.27 7.19 21.71 21.71 45.56 13.56 37.57 45.56
Span 7.00m
172.Z.13 3.25 10.51 13.25 17.14 8.19 17.14 17.14
172.Z.14 3.49 6.96 11.93 6.96 14.24 14.15 19.42 9.00 14.15 19.42 14.15 19.42
172.Z.15 3.73 7.44 13.37 7.44 15.22 15.85 21.75 9.77 15.85 21.75 15.85 21.75
172.Z.16 3.98 7.92 14.83 7.92 16.19 17.56 24.11 10.52 17.56 24.11 17.56 24.11
172.Z.18 4.45 8.85 17.74 8.85 18.11 20.99 28.81 11.91 20.99 28.81 20.99 28.81
172.Z.20 4.93 9.78 9.78 24.32 24.32 24.32
172.Z.23 5.63 11.16 11.16 29.08 29.08 29.08
172.Z.25 6.09 12.07 12.07 32.09 32.09 32.09
202.Z.14 3.82 14.16 19.99 23.02 8.87 23.02 —– 23.02
202.Z.15 4.09 10.79 15.91 10.79 21.36 18.83 25.85 7.03 9.65 18.83 25.85 18.83 25.85
202.Z.16 4.35 11.48 17.68 11.48 22.74 20.91 28.71 7.57 10.40 20.91 28.71 20.91 28.71
202.Z.18 4.88 12.85 21.21 12.85 25.45 25.06 34.40 8.61 11.81 24.57 33.72 25.06 34.40
202.Z.20 5.40 14.21 14.21 29.12 9.55 27.30 29.12
202.Z.23 6.17 16.22 16.22 34.94 10.81 30.90 34.94
202.Z.27 7.19 18.85 18.85 42.30 12.26 34.99 42.30
232.Z.15 4.44 18.34 28.63 29.76 10.46 29.39 29.76
232.Z.16 4.73 14.81 20.43 15.83 30.47 24.15 33.14 8.32 11.42 23.49 32.25 24.15 33.14
232.Z.18 5.30 17.73 24.61 17.73 34.12 29.06 39.89 9.69 13.30 27.54 37.80 29.06 39.89
232.Z.20 5.87 19.61 28.71 19.61 37.74 33.88 46.50 10.99 15.08 31.38 43.07 33.88 46.50
232.Z.23 6.71 22.40 22.40 40.84 12.78 36.65 40.84
Span 7.50m
202.Z.14 3.82 13.18 17.97 21.49 8.08 21.49 21.49
202.Z.15 4.09 9.44 14.82 9.44 19.20 17.58 24.13 8.80 17.58 24.13 17.58 24.13
202.Z.16 4.35 10.05 16.47 10.05 20.44 19.52 26.79 9.48 19.52 26.79 19.52 26.79
202.Z.18 4.88 11.25 19.75 11.25 22.88 23.39 32.11 10.78 23.04 31.62 23.39 32.11
202.Z.20 5.40 12.43 12.43 27.18 25.59 27.18
202.Z.23 6.17 14.19 14.19 32.61 28.96 32.61
202.Z.27 7.19 16.50 16.50 39.48 32.76 39.48
232.Z.15 4.44 17.08 25.82 27.78 9.53 27.55 27.78
232.Z.16 4.73 13.78 19.03 13.88 27.48 22.54 30.93 10.42 22.03 30.24 22.54 30.93
232.Z.18 5.30 15.55 22.93 15.55 30.77 27.12 37.23 12.14 25.85 35.47 27.12 37.23
232.Z.20 5.87 17.19 26.74 17.19 34.03 31.62 43.40 13.77 29.46 40.43 31.62 43.40
232.Z.23 6.71 19.64 19.64 38.12 34.41 38.12
232.Z.25 7.27 21.25 21.25 42.31 37.39 42.31
Span 8.00m
202.Z.14 3.82 12.33 —– 16.22 20.14 20.14 20.14
202.Z.15 4.09 8.31 13.86 8.31 17.33 16.48 22.62 16.48 22.62 16.48 22.62
202.Z.16 4.35 8.85 15.40 8.85 18.45 18.30 25.12 18.30 25.12 18.30 25.12
202.Z.18 4.88 9.91 18.48 9.91 20.65 21.93 30.10 21.69 29.77 21.93 30.10
202.Z.20 5.40 10.95 10.95 25.48 24.09 25.48
202.Z.23 6.17 12.50 12.50 30.58 27.25 30.58
202.Z.27 7.19 14.53 14.53 37.02 30.81 37.02
232.Z.15 4.44 15.97 23.37 26.04 25.93 26.04
232.Z.16 4.73 12.26 17.80 12.26 24.88 21.13 29.00 20.74 28.47 21.13 29.00
232.Z.18 5.30 13.72 21.45 13.72 27.86 25.43 34.90 24.35 33.42 25.43 34.90
232.Z.20 5.87 15.18 25.02 15.18 30.81 29.64 40.68 27.76 38.10 29.64 40.68
232.Z.23 6.71 17.34 17.34 35.74 32.43 35.74
232.Z.25 7.27 18.76 18.76 39.66 35.23 39.66
262.Z.16 5.11 20.07 32.35 32.67 32.67 32.67 32.67
262.Z.18 5.73 17.61 24.31 18.29 36.24 28.80 39.53 38.95 28.80 39.53 28.80 39.53
262.Z.20 6.34 20.23 28.49 20.23 40.09 33.71 46.28 44.32 33.71 46.28 33.71 46.28
Span 8.50m
232.Z.15 4.44 15.00 21.23 24.51 24.49 24.51
232.Z.16 4.73 10.88 16.71 10.88 22.60 19.89 27.29 19.59 26.89 19.89 27.29
232.Z.18 5.30 12.19 20.14 12.19 25.31 23.93 32.85 23.00 31.57 23.93 32.85
232.Z.20 5.87 13.48 23.50 13.48 27.99 27.90 38.29 26.23 36.00 27.90 38.29
232.Z.23 6.71 15.40 15.40 33.64 30.64 33.64
232.Z.25 7.27 16.65 16.65 37.33 33.29 37.33
262.Z.16 5.11 18.84 29.46 30.74 30.74 30.74
262.Z.18 5.73 16.27 22.83 16.27 33.00 27.10 37.20 27.10 37.20 27.10 37.20
262.Z.20 6.34 18.00 26.76 18.00 36.52 31.73 43.55 31.73 43.55 31.73 43.55
262.Z.23 7.26 20.57 20.57 38.47 38.47 38.47
262.Z.25 7.86 22.26 22.26 42.84 42.84 42.84
Span 9.00m
232.Z.15 4.44 14.13 19.35 23.15 23.15
232.Z.16 4.73 9.71 15.75 9.71 20.60 18.78 25.78 18.78 25.78
232.Z.18 5.30 10.87 18.98 10.87 23.07 22.60 31.02 22.60 31.02
232.Z.20 5.87 12.03 22.15 12.03 25.51 26.35 36.16 26.35 36.16
232.Z.23 6.71 13.74 13.74 31.77 31.77
232.Z.25 7.27 14.86 14.86 35.26 35.26
262.Z.16 5.11 17.75 26.92 29.04 29.04
262.Z.18 5.73 14.55 21.52 14.55 30.15 25.60 35.13 25.60 35.13
262.Z.20 6.34 16.10 25.22 16.10 33.36 29.97 41.13 29.97 41.13
262.Z.23 7.26 18.39 18.39 36.33 36.33
262.Z.25 7.86 19.91 19.91 40.46 40.46
Span 9.50m
262.Z.16 5.11 16.78 24.67 27.51 27.51
262.Z.18 5.73 13.07 20.34 13.07 27.63 24.25 33.29 24.25 33.29
262.Z.20 6.34 14.46 23.84 14.46 30.57 28.39 38.97 28.39 38.97
262.Z.23 7.26 16.52 16.52 34.42 34.42
262.Z.25 7.86 17.88 17.88 38.33 38.33
262.Z.29 9.06 20.56 20.56 45.95 45.95
302.Z.20 7.86 31.32 51.35 51.14 51.14 51.14
302.Z.23 9.01 28.57 39.48 28.58 58.75 46.88 64.35 46.88 64.35 46.88 64.35
Span 10.00m
262.Z.16 5.11 15.90 22.66 26.13 26.13
262.Z.18 5.73 11.78 19.27 11.78 25.38 23.04 31.62 23.04 31.62
262.Z.20 6.34 13.04 22.59 13.04 28.09 26.97 37.02 26.97 37.02
262.Z.23 7.26 14.90 14.90 32.70 32.70
262.Z.25 7.86 16.12 16.12 36.41 36.41
262.Z.29 9.06 18.54 18.54 43.65 43.65
302.Z.20 7.86 29.69 47.31 48.58 48.58 48.58
302.Z.23 9.01 25.84 37.43 25.84 54.12 44.54 61.13 44.54 61.13 44.54 61.13
302.Z.25 9.76 27.99 27.99 50.61 50.61 50.61
302.Z.29 11.27 32.24 32.24 62.44 62.44 62.44
Span 10.50m
262.Z.16 5.11 15.10 20.87 24.89 24.89
262.Z.18 5.73 10.67 18.31 10.67 23.38 21.94 30.12 21.94 30.12
262.Z.20 6.34 11.80 11.80 25.69 25.69
262.Z.23 7.26 13.48 13.48 31.14 31.14
262.Z.25 7.86 14.59 14.59 34.68 34.68
262.Z.29 9.06 16.78 16.78 41.57 41.57
302.Z.20 7.86 28.21 43.68 46.27 46.27 46.27
302.Z.23 9.01 23.45 35.57 23.45 49.98 42.41 58.22 42.41 58.22 42.41 58.22
302.Z.25 9.76 25.40 25.40 48.20 48.20 48.20
302.Z.29 11.27 29.26 29.26 59.46 59.46 59.46
342.Z.23 9.73 40.44 65.67 66.10 66.10 66.10
342.Z.25 10.55 33.36 46.15 34.15 71.15 54.90 75.36 54.90 75.36 54.90 75.36
342.Z.27 11.37 36.76 36.76 61.56 61.56 61.56
342.Z.30 12.58 40.65 40.65 71.30 71.30 71.30
Span 11.00m
262.Z.16 5.11 14.37 19.26 23.76 23.76
262.Z.18 5.73 9.68 17.43 9.68 21.58 20.94 28.75 20.94 28.75
262.Z.20 6.34 10.71 10.71 24.52 24.52
262.Z.23 7.26 12.24 12.24 29.73 29.73
262.Z.25 7.86 13.25 13.25 33.10 33.10
262.Z.29 9.06 15.24 15.24 39.68 39.68
302.Z.20 7.86 26.86 40.43 44.16 44.16 44.16
302.Z.23 9.01 21.35 33.88 21.35 46.25 40.49 55.57 40.49 55.57 40.49 55.57
302.Z.25 9.76 23.13 23.13 46.01 46.01 46.01
302.Z.29 11.27 26.64 26.64 56.76 56.76 56.76
342.Z.23 9.73 38.52 60.90 63.10 63.10 63.10
342.Z.25 10.55 31.15 43.96 31.15 65.98 52.41 71.93 52.41 71.93 52.41 71.93
342.Z.27 11.37 33.53 33.53 58.76 58.76 58.76
342.Z.30 12.58 37.08 37.08 68.06 68.06 68.06
Span 11.50m
302.Z.20 7.86 25.63 37.49 42.24 42.24 42.24
302.Z.23 9.01 19.50 32.33 19.50 42.90 38.73 53.15 38.73 53.15 38.73 53.15
302.Z.25 9.76 21.12 21.12 44.01 44.01 44.01
302.Z.29 11.27 24.33 24.33 54.29 54.29 54.29
342.Z.23 9.73 36.76 56.59 60.35 60.35 60.35
342.Z.25 10.55 28.50 41.96 28.50 61.31 50.13 68.81 50.13 68.81 50.13 68.81
342.Z.27 11.37 30.68 30.68 56.20 56.20 56.20
342.Z.30 12.58 33.92 33.92 65.10 65.10 65.10
Span 12.00m
302.Z.20 7.86 24.49 34.84 40.48 40.48 40.48
302.Z.23 9.01 17.86 30.91 17.86 39.86 37.11 50.94 37.11 50.94 37.11 50.94
302.Z.25 9.76 19.34 19.34 42.18 42.18 42.18
302.Z.29 11.27 22.28 22.28 52.03 52.03 52.03
342.Z.23 9.73 35.15 52.68 57.84 57.84 57.84
342.Z.25 10.55 26.14 40.13 26.14 57.08 48.04 65.94 48.04 65.94 48.04 65.94
342.Z.27 11.37 28.14 28.14 53.86 53.86 53.86
342.Z.30 12.58 31.12 31.12 62.39 62.39 62.39
Span 12.50m
302.Z.20 7.86 23.45 32.43 38.86 38.86 38.86
302.Z.23 9.01 16.39 29.60 16.39 37.11 35.63 48.90 35.63 48.90 35.63 48.90
302.Z.25 9.76 17.76 17.76 40.49 40.49 40.49
302.Z.29 11.27 20.45 20.45 49.95 49.95 49.95
342.Z.23 9.73 33.66 49.13 —— 55.53 55.53 55.53
342.Z.25 10.55 24.04 38.43 24.04 53.23 46.12 63.30 46.12 63.30 46.12 63.30
342.Z.27 11.37 25.88 25.88 51.71 51.71 51.71
342.Z.30 12.58 28.62 28.62 59.9 59.9 59.9
Span 13.00m
302.Z.20 7.86 22.48 30.24 37.37 37.37 37.37
302.Z.23 9.01 15.08 28.38 15.08 34.6 34.26 47.02 34.26 47.02 34.26 47.02
302.Z.25 9.76 16.33 16.33 38.93 38.93 38.93
302.Z.29 11.26 18.82 18.82 48.03 48.03 48.03
342.Z.23 9.73 32.28 45.9 53.39 53.39 53.39
342.Z.25 10.55 22.16 36.87 22.16 49.73 44.35 60.87 44.35 60.87 44.35 60.87
342.Z.27 11.37 23.86 23.86 49.72 49.72 49.72
342.Z.30 12.58 26.38 26.38 57.59 57.59 57.59
Span 13.50m
342.Z.23 9.73 31.01 42.94 51.41 51.41
342.Z.25 10.55 20.47 35.41 20.47 46.53 42.7 58.61 42.7 58.61
342.Z.27 11.37 22.04 22.04 47.88 47.88
342.Z.30 12.58 24.37 24.37 55.46 55.46
Span 14.00m
342.Z.23 9.73 29.82 40.24 49.58 49.58
342.Z.25 10.55 18.95 34.06 18.95 43.6 41.18 56.52 41.18 56.52
342.Z.27 11.37 20.4 20.4 46.17 46.17
342.Z.30 12.58 22.55 22.55 53.48 53.48
Span 14.50m
342.Z.23 9.73 28.71 37.76 47.87 47.87
342.Z.25 10.55 17.56 32.79 17.56 40.91 39.76 54.57 39.76 54.57
342.Z.27 11.37 18.91 18.91 44.58 44.58
342.Z.30 12.58 20.9 20.9 51.63 51.63
Span 15.00m
342.Z.23 9.73 27.67 35.48 46.27 46.27
342.Z.25 10.55 16.3 31.61 16.3 38.44 38.43 52.75 38.43 52.75
342.Z.27 11.37 17.55 17.55 43.09 43.09
342.Z.30 12.58 19.41 19.41 49.91 49.91