EKFB JV - Supply of Bridge Deck Sub Surface drainage

The subsurface drainage system for bridge decks is to comprise a proprietary system consisting of perforated metal tubes laid on top of the deck waterproofing. The system shall have a minimum Design Working Life of 30 years, to match the bridge deck waterproofing system. Pipes are to be manufactured from aluminium or galvanised mild steel and have slots or perforations at regular intervals to receive any water trapped above the waterproofing. Pipes are to have a flat underside and a minimum cross sectional area of...