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Rectangular Concrete Chambers

Loose steps can be supplied for use with the 1200x750 and 1475x1025 sections. For a range of smaller rectangular concrete chambers referred to as House Inspection Chambers see our House Building product specifier.

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Rectangular Inspection Chambers
  Code Size (mm) Effective Depth (mm) wall Thickness (mm) Nominal Weight of Unit (kg) Number of Units Per Pallet
image 18011200RHHS 1200 x 750 150 75 115 8
image 18011200500RHHS 1200 x 750 500 75 390 -
image 18011200750RHHS 1200 x 750 750 75 600 -
image 18011400RHHS 1475 x 1025 250 100 355 -
Rectangular Cover Slabs
  Code Size (mm) Access (mm) Effective Thickness (mm) Nominal Weight of Units (kg) Number of Units Per Pallet
image 18011200RMHCSH 1200 x 750 HD 600 x 600 144 310 5
image 18011209060RMHCSH 1200 x 750 HD 900 x 600 144 235 5
image 18011200RMHTS 1200 x 750 HD 1200 x 675 125 230 5
image 180111475RMHCSH 1475 x 1025 HD 600 x 600 144 640 -
image 18011479060RMHCSH 1475 x 1025 HD 900 x 600 144 580 -
image 18011475RMHTS 1475 x 1025 HD 1200 x 675 144 485 -

Chamber sections and cover slabs are manufactured to BS EN1917:2002 / BS 5911-3:2002.

Rectangular covers and cover surrounds are manufactured to satisfy Class A15 loading situations to BS EN 124. All units are to sulfate resistance Class 4.

Heavy Duty - These cover slabs may be used together with the appropriate duty proprietary cover and frame in main road situations, equivalent to a wheel load of 112kN.

  1. Place the bottom unit with either integral precast, or insitu concrete base.
  2. Erect the required number of standard components and seal the joints as appropriate all in accordance with the design.
  3. Place a reinforced concrete cover slab on top.
  4. If required place a corbel slab then add the appropriate number of adjusting units.
  5. Fit the manhole top for access from ground level.