Pole Selection Formula

The Signfix Sign Support System which includes the channel system, brackets, clips, poles and ground sockets, exceeds the structural and design life requirements of AS/NZS1170. Signfix Fluted Poles are deemed to comply with the impact requirements, for small signs, of Clause 9.1 of NZTA P/24:2008 Performance Based Specification for Traffic Signs as listed in the RSMA Compliance Standard for Traffic Signs:2008. The Signfix Fluted Pole is extruded from strong structural grade 6061 T5 or T6 aluminium and is finished with a maintenance free white polyester powder coating making them ideal for coastal locations. The Fluted Poles are designed to eliminate sign rotation when used with Signfix Anti-Rotational Clips, Ground Sockets and Channel Systems. 

Our Signfix Fluted Poles and purpose made aluminium Ground Sockets complete the Signfix Frangible Aluminium Pole System and when correctly installed, meets the requirements of NZTA P/24 and the RSMA Standard for Traffic Signs. Pole selection charts are published in Appendix B of the Standard (www.rsma.org.nz).

An excel based pole selection formula for Aluminium Fluted Poles has been developed based on these charts - please feel free to download a copy HERE.
For more information on the Aluminium Fluted Poles, please click HERE

The alloy has the following characteristic properties:
f y = 255 MPa
fu = 295 MPa
% elongation to failure = 7% over a gauge length of 50mm or 5.65/A

Wall Thickness (mm) Relating to the trough and crest of the fluting:-
60mm Pole   2.80  3.75
76mm Pole   3.05  4.00
89mm Pole   3.55  4.50 
102mm Pole 4.10  5.00
114mm Pole 4.60  5.50

Standard Lengths
Signfix Fluted poles are supplied in a range of diameters and standard lengths to reduce costly offcuts.
60mm - 3.5m, 4m
76mm - 3.5m, 4m, 5m
89mm - 4m, 4.5m, 5m
102mm - 4.5m, 5m , 5.5m
114mm - 5m, 5.5m, 5.87m