Propurlin
Ultimate Loads for Double Span Purlins (in KN)
Section Type
Span Load 125 125 125 150 150 150 175 175 175 200 200 200 225 225 225 250 250 250
(m) Type 1.5 1.8 2.0 1.5 1.8 2.0 1.5 1.8 2.0 1.5 1.8 2.0 1.5 1.8 2.0 1.5 1.8 2.0
 
4.5 Downwards 11.82 15.09 17.12 14.75 18.86 21.41 19.12 24.46 27.80 22.45 28.77 32.73 25.86 33.19 37.80 29.32 37.70 43.00
4.5 Uplift 9.45 12.08 13.70 11.80 15.09 17.13 15.29 19.57 22.24 17.96 23.01 26.18 20.69 26.55 30.24 23.46 30.16 34.40
4.5 L / 180 10.64 12.78 14.15 16.23 19.51 21.65 23.23 27.94 30.95 31.76 38.21 42.35 41.91 50.44 55.93 53.80 64.76 71.83
 
5.0 Downwards 10.64 13.58 15.41 13.28 16.97 19.27 17.20 22.01 25.02 20.21 25.89 29.46 23.27 29.87 34.02 26.39 33.93 38.70
5.0 Uplift 8.51 10.87 12.33 10.62 13.58 15.42 13.76 17.61 20.01 16.17 20.71 23.57 18.62 23.89 27.22 21.11 27.14 30.96
5.0 L / 180 8.62 10.35 11.46 13.14 15.80 17.53 18.82 22.63 25.07 25.72 30.95 34.30 33.95 40.85 45.30 43.58 52.46 58.18
 
5.5 Downwards 9.67 12.35 14.01 12.07 15.43 17.52 15.64 20.01 22.74 18.37 23.54 26.78 21.16 27.16 30.93 23.99 30.84 35.18
5.5 Uplift 7.73 9.88 11.21 9.66 12.34 14.01 12.51 16.01 18.19 14.70 18.83 21.42 16.93 21.72 24.74 19.19 24.68 28.15
5.5 L / 180 7.12 8.56 9.47 10.86 13.06 14.49 15.55 18.70 20.72 21.26 25.58 28.35 28.06 33.76 37.44 36.02 43.35 48.08
 
6.0 Downwards 8.86 11.32 12.84 11.07 14.14 16.06 14.34 18.34 20.85 16.84 21.57 24.55 19.40 24.89 28.35 21.99 28.27 32.25
6.0 Uplift 7.09 9.06 10.27 8.85 11.31 12.85 11.47 14.67 16.68 13.47 17.26 19.64 15.52 19.91 22.68 17.59 22.62 25.80
6.0 L / 180 5.99 7.19 7.96 9.13 10.97 12.18 13.07 15.71 17.41 17.86 21.49 23.82 23.58 28.37 31.46 30.26 36.43 40.40
 
6.5 Downwards 8.18 10.45 11.85 10.21 13.06 14.82 13.23 16.93 19.24 15.55 19.91 22.66 17.90 22.98 26.17 20.30 26.10 29.77
6.5 Uplift 6.54 8.36 9.48 8.17 10.44 11.86 10.59 13.55 15.39 12.44 15.93 18.13 14.32 18.38 20.94 16.24 20.88 23.82
6.5 L / 180 5.10 6.13 6.78 7.78 9.35 10.37 11.13 13.39 14.84 15.22 18.31 20.30 20.09 24.17 26.80 25.79 31.04 34.43
 
7.0 Downwards 7.60 9.70 11.01 9.48 12.12 13.76 12.29 15.72 17.87 14.43 18.49 21.04 16.62 21.34 24.30 18.85 24.24 27.64
7.0 Uplift 6.08 7.76 8.80 7.59 9.70 11.01 9.83 12.58 14.30 11.55 14.79 16.83 13.30 17.07 19.44 15.08 19.39 22.11
7.0 L / 180 4.40 5.28 5.85 6.71 8.06 8.95 9.60 11.55 12.79 13.12 15.79 17.50 17.32 20.84 23.11 22.23 26.76 29.68
 
7.5 Downwards       8.85 11.31 12.85 11.47 14.67 16.68 13.47 17.26 19.64 15.52 19.92 22.68 17.59 22.62 25.80
7.5 Uplift       7.08 9.05 10.28 9.18 11.74 13.34 10.78 13.81 15.71 12.41 15.93 18.14 14.08 18.10 20.64
7.5 L / 180       5.84 7.02 7.79 8.36 10.06 11.14 11.43 13.75 15.25 15.09 18.16 20.13 19.37 23.31 25.86
 
8.0 Downwards         10.61 12.04 10.75 13.76 15.64 12.63 16.18 18.41 14.55 18.67 21.26 16.49 21.21 24.19
8.0 Uplift         8.49 9.63 8.60 11.01 12.51 10.10 12.94 14.73 11.64 14.93 17.01 13.20 16.96 19.35
8.0 L / 180         6.17 6.85 7.35 8.84 9.79 10.05 12.09 13.40 13.26 15.96 17.70 17.02 20.49 22.73
 
Note: All Intermediate values within the limits of the table may be obtained by linear interpolation.
Propurlin System - Links
  • Introduction
  • Typical Views of Roof and Sheeting Rail Propurlins
  • Section Properties
  • Key for Double Span Propurlin System and Allowable Loads Tables
  • Key for Simply Supported Single Span Propurlin System and Allowable Loads Tables
  • Key for Double Span Sheeting Rail System and Allowable Loads Tables
  • Key for Single Span Sheeting Rail System and Allowable Loads Tables
  • Ultimate Loads for Single Span Purlins
  • Sag Bars and Horizontal Bracing Requirements
  • Sag Bar Details
  • Struts for Sheeting Rails and Purlins
  • Diagonal Tie Brackets
  • Apex Detail
  • Rafter Stay Detail
  • Sleeves Details
  • Cleats Details
  • Eaves Beams - Physical Properties
  • Eaves Beams - Load Table in Single Span Condition
  • Cleader Angles - Physical Properties
  • C-Sections:
  • Range of Inwardly Lipped C-Sections - Physical Properties
  • Range of Compound Sections - Physical Properties
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