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BUILDINGINFRASTRUCTURELANDSCAPINGPOLES AND MASTSFUNDAMENTALS OF
PRESTRESSINGGUIDELINE FOR TRANSPORTING,
HANDLING AND STACKING
RANGE OF POLES AND MASTSAPPLICATION AND
INSTALLATION GUIDELINESTECHNICAL DRAWINGASSOCIATED PRODUCTSRAILWAY
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Table 1: Pole properties with loads applied 300mm from tip


Factor of safety of 2.5 as per the OHS Act and ESKOM specifi cations

Table 2: Mast properties with loads applied 400mm from tip


Factor of safety of 2.5 as per the OHS Act and ESKOM specifi cations

Table 3: Mast properties for Transnet Freight Rail (TFR)


Factor of safety of 2.0 as per TFR CEE 0159.98

Definition of loads

• The ultimate load is the maximum load a pole must resist without failure. This is based on the formula of: Ultimate Load = Working Load x Factor of Safety.
• The working load equals 40% of the ultimate load - as per the OHS Act and Eskom specifi cations and 50% of the ultimate load as per OHTE specifi cations.
• The down-line load factor > 30% of transverse load for poles and > 25% of transverse for masts.
* Definition of poles and masts: Poles are designed with tapered butts whereas masts are designed with straight butts.