Big 'J' Inspection Chamber

Big 'J' Inspection Chamber

NOT STOCKED - MADE TO ORDER

A new concept in chamber design. A two-piece unit where the base is integral with the sides. The required pipe openings are cast-in at any desired position, no brickwork or shuttering is required, no awkward holes to be cut. Big 'J' chambers are supplied complete with galvanized step irons and all necessary fixings and come complete with heavy duty cover slabs and manhole access. All units have special lift points cast.
IMPORTANT NOTE: Click here for handling instructions.

Chamber Extensions

Internal dimensions: 600mm x 600mm
Modules: 150mm, 225mm and 300mm depths
Approximate weight: 50kg., 75kg. and 100kg.

Machine-made reinforced concrete sections to BS.5911 part 2 are fitted on the lid of the Big 'J' chamber to extend the opening to ground level. Standard 600mm x 600mm galvanized 17 tonne GVW pressed steel manhole covers cast into a 100mm thick concrete surround are available to fit these units.

Big J Inspection Chamber - Measurements
Big J Inspection Chamber Big J Inspection Chamber Extension

INSTALLATION

Depending on site conditions, it is recommended that these units should be bedded on 100mm of ready mixed concrete. Each section should be hoisted into position separately ensuring that rebated joints properly locate. Use the galvanizes bolts through the fixing brackets at each side to keep the units together during backfilling. Do not over tighten. The drain pipes should just enter the chamber or remain flush on the inside. Make good the voids around the pipes with cement mortar. Make sure the opening in the cover slab is located over the side with the step irons. Rectangular inspection chamber sections can be positioned over the access hole to extend the chamber to required ground level (see below) or full sized extension sections are also available.

BIG 'J' SIZE (D) 1220 x (W) 1070 (D) 1630 x (W) 1070 (D) 1830 x (W) 1375 (D) 1830 x (W) 1675 APPLICATIONS
Height (H) of basic chamber 810mm
1120mm
1420mm
1735mm
2030mm
2340mm
810mm
1120mm
1420mm
1735mm
2030mm
2340mm
780mm
1085mm
1390mm
1695mm
2000mm
780mm
1085mm
1390mm
1695mm
2000mm
Manhole

Piped Ditch Inlet

Tumbling Bay

Flow Meter Box

Pumping Sump

Siphon Pit

Effluent Storage
Height (H) with extension section     2255mm
2560mm
2865mm
3170mm
3475mm
3780mm
2255mm
2560mm
2865mm
3170mm
3475mm
3780mm
Maximum O.D. of pipe recommended 830mm 830mm 1135mm 1440mm