Naylor Access Chambers - Premium Access System
The pioneers of the prefabricated HDPE Access Chamber were Poet Plastics in the 1980's. The HDPE access chamber was a revolution to duct chambers and the Poet chamber became specified via a large number of local authorities.
Naylor's acquisition of Poet's business and tooling some 10 years ago allowed the company to complete its comprehensive duct range.
Subsequent investment in design and tooling has allowed the company to introduce a number of extra features and benefits designed with engineers in mind.
Features & Benefits
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- Manufactured in High Density Polyethylene
- High Chemical Resistance
- High Impact Resistance
- Rotationally moulded on cast aluminium tooling
- Approved by many Local Authorities and Utility Sectors
- Depth has increased from 250mm to 335mm (3 boxes per metre depth)
- Trepanned holes take all electricity and utility size duct eg. 63mm, 90mm, 110mm, 120mm, 145mm and 160mm
- Easy to stack and install
- Wide internal flange within the chamber enables the frame to fit straight onto the box, therefore direct loading is transferred evenly
- Very versatile and suitable for most ducting applications
Installation
- Excavate the required specified location, to the depth of appropriate number of chambers required, (maximum 3 chambers), plus additional 40mm for depth of base.
- Install chamber centrally within the specified trench/location.
- Base of excavated area to be well compacted granular material or concrete slab is preferred. Drainage runs within the slab are required to allow excess water to drain freely from the constructed chamber.
- Before duct connection takes place, the trepanned holes located on each chamber will require cutting out to specified diameter. Naylor Access Chambers take from 63mm to 160mm OD duct pipes.
- Allow minimum of 150mm surrounding the chamber for solid concrete support, which should be of a semi-dry workable mixture.
- Ensure concrete fill is evenly distributed around the chamber and level with the top surface. Concrete the frame in at the appropriate height.
Specification
- The chamber shall be of solid construction of single, double or triple height pre-formed sections and prevent distortion during back-fill process
- The chamber will meet the Highway Regulations of minimum duct cover in both footways and road verges.
- The chamber shall have pre-trepanned cut outs areas to accept 63mm OD - 160mm OD duct except 900 x 450 which accepts 63mm - 120mm.
- The chamber is manufactured in rotational moulding high density polyethylene material
- The chamber shall have a C15/ST3 concrete base and surround, 150mm surround and 150mm base bedded on a 100 mm Type 1 sub base or concrete slab with a 50mm drain hole (base to be constructed first and have a smooth floated finish)
- For traffic signal/street lighting applications the covers are non ferrous composite material and fit closely within a galvanised steel frame. The cover and frame will meet the loading requirements of BS EN 124 Class 125. The cover is black in colour and marked Naylor Drainage and the legend ‘‘Traffic Signals’’ or ‘‘Street Lighting’’ and have integral lifting keyholes. The cover has an integral anti-skid pattern on the upper surface. The frame must also be supported on the concrete surround of the chamber on a bed of mortar
GENERAL NOTE Chambers, when completed, must be internally free from any debris
Naylor Pole Box - Metro Pole Box System
Features and Benefits
- Protects cables
- Easy access
- Moulded clamp holds pole securely
- Suitable for 63mm - 120mm OD duct
Specification
- The pole box shall be of one-piece, structured wall design and rotationally moulded in high density polyethylene
- The pole box shall be either 450 x 450mm or 295 x 275 x 500mm in size with an integral housing for 115mm pole
- Each point of entry shall have 62 to 120mm pre-trepanned cut-outs
- The depth of the box is 500mm
Installation
- Stand on a well compacted bedding or concrete slab
- Drainage runs situated within the slab are required to allow excess water to drain away from the constructed chamber
- 115mm Traffic Pole is located within the pre-formed Polyethylene clamp which is located on the Pole Box
- A minimum of 150mm concrete surround is required to support the chamber when the chamber is fully connected to the traffic pole
- Ensure concrete fill is evenly distributed around the Pole Box and level with the top surface. Concrete the frame in at the appropriate level
Naylor Covers and Frames - Composite and Galvanised
Features and Benefits
- Wide external flange enables frame to fit directly onto chamber surround
- Deep seated frame fits exactly into Chamber
- New Anti-Slip resistance compositive cover
- Available in all key sizes
- Approved by Devonshire County Council, Greater London Council and most Local Authorities
- Successfully passing all SRV requirements, wet and dry
- Loading B125
- Stocked as standard
- Deep seated galvanised steel framework
- Ensures flush fitting to Naylor Access Chamber
- Available locking as standard