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Published on Nov 15, 2016
Find out more at www.fibrelite.com It’s very difficult to look at a composite access cover and know how it will perform over time and under repeated heavy wheel loads. The simplest way to test and measure this is by level of deflection. Excessive deflection indicates a lack of stiffness and potentially leads to fatigue and premature failure in manhole covers. Repeated deflection beyond the elastic limit results in permanent deformation. Permanent deformation presents safety issues with rain water pooling on the manhole cover, the cover no longer seating correctly within the frame and ultimately failure of the cover.