Duct Access Chambers / Draw Boxes / Pole Boxes / Covers
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Duct Access Chamber / Draw Box
Although it is aimed primarily at the Street Lighting and Traffic Signals industries, it is suitable for most applications where a duct access chamber is required.
The robust design means that the boxes are not prone to deformation whilst being backfilled with concrete, unlike some other systems on the market, giving the contractor and client peace of mind.
The benefits to the contractor are:
Speed and ease of installation
Light weight sections
150mm deep sections for greater flexibility and less waste
Pre-Trepanned guide holes for easy access
Pre-Formed base units
Cost competitive against traditional products
Can be installed with or without concrete surround
Recommended Installation Guide
The Access Chamber should be bedded on a base of 100mm thick C20 drymix concrete and the base be
chamfered to obtain a natural soakaway outlet. Alternatively use a pre-formed base set in no-fines semi
porous concrete mix.
The sides can be backfilled with dug material, granular material or concrete.
Duct inspection chamber are be manufactured from 32mm thick, high density polyethylene and have a
smooth inner wall with reinforcing ribs on the external wall for extra rigidity. Each section is 150mm overall depth and are supplied with standard a locating flange to the top section for ease of assembly. Assembled Boxes are capable of withstanding a 12.5 tonne wheel load, without the need for structural concrete surround.
Boxes are made up of separate, interlocking sections and have the capability to be assembled or
disassembled on site without the need for sawing or specialist equipment.
Box Sections come complete with pre-formed knock out sections to accommodate duct sizes of 50mm, 66mm and 110mm outside diameters.
Boxes can be supplied with a pre-formed GRP base unit for ease and speed of installation which should be bedded in a no-fines, semi porous, concrete mix to allow any ground water to flow away.
The Access should be bedded on a base of 100mm thick C20 drymix concrete and the base be chamfered to obtain a natural soakaway outlet. Alternatively use a pre-formed base set in no-fines semi porous concrete mix. The sides can be backfilled with dug material, granular material or concrete.