To cover the access pits, modular lightweight trench covers were supplied at a D400 load rating, allowing for safe two-person removal. For the water valve pits, sealed composite covers and frames were supplied at F900 load rating, which are light enough for safe single-person removal.

All Fibrelite covers are designed to be manually removed/replaced by either one or two people using the Fibrelite designed lifting handle(s) even at F900 (90 ton) tonne) load rating. They also have an inherent resistance to corrosion and are hardwearing even in the harshest environment (extensively tested, see reports).