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- Sub Surface Drainage Channel System c/w Through Deck Outlets
- Provides additional and Lower sub Surface Water Collection
- Used with Envirodeck/Hydrodeck Combined Kerb Drainage Systems
- Wide Range of System Components - Angles/Tees/Bends
- High Strength Ductile Iron Channel
- ABS Heat Resistant Outlet Fittings
- Wide Range of Beneath Deck Pipes
- Pipe Hangers and Fixings Complete The System
Sub-surface drainage on bridge decks is an essential part of any design
PDS are the market leaders in the design, manufacture and supply of Combined Kerb Bridge Drainage Systems. Our Hydrodeck and Envirodeck kerb units provide effective surface water drainage and sub surface water collection to the asphalt layers.
Lateral drainage slots in kerb systems provide relief to the pumping action of wheel loads within the asphalt construction, but all kerb systems are limited in their ability to drain at deck level. This is due to a base thickness of the unit and the mortar bed which can raise the sub-surface collection holes further from the deck.
Kerb units are usually laid directly on top of the RSA protection or regulating course. This raises the sub surface slots on the deck units a further 20mm (approx) from the deck. A secondary system is therefore desirable to pick up any sub surface water at this lower level.
PDS, in partnership with USL have developed a complete system for the collection of sub surface water at deck level.
PDS have become sole distributor for the Dri-deck sub surface drainage system. In addition we have developed a separate channel drainage solution to provide continuous water collection at deck level. The channels and components have been designed to be fully compatible and complement the existing Dri-deck range of products.
PDS can also offer advice, designs and supply on carrier pipes beneath the deck in a wide range of materials including UPVC, Polyethylene and Cast Ductile Iron.
Features and benefits
Health & Safety
Unit weights are reduced by over 50% to comply with the new manual handling guidelines and save precious dead weight on both new and refurbishment structures.
The whole system is complimented by a full range of pipe hangers and supports, including Expansion Joint bellows where carrier pipes have to cross Expansion points.
Introduction
The Dri-deck drainage unit provides sub-surface collection at two levels. Water is collected immediately above the waterproofing membrane and also from any bituminous protection such as Red Sand Asphalt or regulating course. The Dri-deck channel provides continuous sub surface water collection along kerb lines and/or can be placed transversely along the deck. T pieces, bends and cross sections allow a number of drainage designs. The channel sections can be situated close to the Dri-deck unit as a soak-away type of outlet or channel outlets can be placed directly over the Dri-deck base section.
For more detailed information & diagrams please click here to download a PDF.
The System
The Dri-deck Channel
Dri-deck channel units 1mtr in length have a number of slots along the length for high water collection. Manufactured in spheroidal graphite iron they are extremely robust and able to withstand the point loadings placed by tarmacadam rollers. They are also highly resistant to road salts. The channels are bonded to the waterproofing using Dri-deck bedding compound. Tee Sections, Bends, Cross pieces and Outlets complete the system.
The base unit is recessed to provide a seating for the cover unit and incorporates a flared edge for a smooth transition and termination of the waterproofing membrane.
The unique convoluted cover units are formed from a high strength and resilient thermoplastic material that is heat resistant and proven to resist deformation under surfacing compaction. Inlet holes at the top and bottom of the cover unit allow drainage from above and below the waterproofing protective layer.
The system is supplied with a range of compatible pipework that is both economic and easy to use.
The 57mm High standard cover unit is suitable for a minimum surfacing depth of 75mm.
A special 42mm low profile cover unit is available for shallower depths. All other components are listed.
Installation of the Dri-deck System
Dri-deck Outlets
The base unit is cast in-situ during the deck concreting operation for new works construction or alternatively is set into a core-drilled recess in the deck during refurbishment or maintenance work.
The waterproofing membrane is then laid and lapped over the flared edge of the base unit. A temporary blanking plug is placed into the base unit, allowing unimpeded machine laying of the protective layer.
Finally the plug is removed and the cover unit located prior to completion of the surfacing.
For detailed information, please refer to Components Specification section.
Dri-deck Channels
These should be located along kerb lines and/or transversely across the deck close to any expansion joints and bonded directly onto the waterproofing using Dri-deck Fixing Compound.
Care should be taken with the bedding material so no voids exist between the channel flange and the deck.
Any outlets and fittings are fixed into position and the RSA or regulating course is then laid.
For more detailed information & diagrams please click here to download a PDF.