40 Tonne safe test load hinged grating and frame suitable for carriageways and fast moving traffic. Constructed of ductile iron for improved strength to weight ratio. Featuring anti-movement technology for improved bonding to bedding material and non-rock three point suspension for increased stability and silent operation. BSI Kitemarked for third party assurance of quality. Suits 450mm road gully.
Sizes are base opening size - put simply this is the size of the hole which the cover is to span. The clear opening size of the cover is the inside frame dimension and consequently the cover & frame will then sit on the surrounding chamber. Please do not take this size to be the overall dimensions.
Pictures are for illustration only - actual appearance may vary.