Both NiuBridge & NiuDeck require a durable deck wearing surface to be installed to ensure that the designed service life is achieved. In order to maximise the life of the deck wearing surface the entire bridge structure must be tight to minimise movement under load.

The recommended deck wearing surfaces are either a multi-layered aggregate system or asphaltic concrete. The weight of this surface needs to be considered in the design load of the bridge.

Multi-layered aggregate system:

• Spray deck, ends and edges with a Cationic Rapid Set Emulsion (CRS) in accordance with the manufacturer’s instructions.
• Apply and roll with a non-vibrating roller 14mm chip layer to the surface.
• ·Spray a second coat of emulsion.
• Apply and roll with a non-vibrating roller a 7mm chip layer to the surface
• Repeat layers for the desired thickness and durability. Remove excess loose chip from the final layer.

Asphaltic Concrete:

• Spray deck, ends and edges with a Cationic Rapid Set Emulsion (CRS) in accordance with the manufacturer’s instructions.
• Apply and roll with a non-vibrating roller a 7mm chip layer to the surface.
• Apply a minimum 30mm thick layer of asphaltic concrete.
• Roll with a non-vibrating roller and allow to cure.