Hyland Consultants developed fatigue life design software for the response of lighting poles to New Zealand wind conditions.  Current code based S-N methods are not well  suited for the design of structures subjected to variable loadings due to wind.  S-N methods can result in over designed or unreliable structures. 

Our development program therefore involved review of international literature, development of crack growth and loadings analytical models,  strain gauge monitoring of a lighting pole in varying wind conditions, and fatigue assembly proof testing at the University of Auckland.