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CPM Group Ltd offer a range of precast concrete inspection chambers in a variety of depths, with tongue and groove joints.
All units can be supplied banded as detailed in the tables on weights and dimensions.
The chambers are economic and versatile to meet the demands of domestic drainage installation.
HIC chamber sections weights and dimensions
Internal dimensions of chamber sections |
Depth of sections |
Wall thickness |
Weight of sections |
mm |
mm |
mm |
kg |
600 x 450
600 x 450
600 x 450 |
150
225
300 |
50
50
50 |
44
58
86 |
750 x 600
750 x 600
750 x 600 |
150
225
300 |
60
60
60 |
67
100
134 |
1000 x 675
1000 x 675 |
150
225 |
65
65 |
83
130 |
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Banded details
|
| |
weight approx. |
no. |
kg |
32
20
16 |
1410
1160
1380 |
16
10
8 |
1070
1000
1070 |
16
10 |
1330
1300 |
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Note.
1. Chamber sections can be supplied banded on request.
2. For depths in excess of 1.5m the use of a concrete surround is recommended.
chamber section
Top sections for concrete covers weights and dimensions
| To suit chamber sections |
Overall dimensions |
Effective
depth of sections |
Overall
depth of
sections |
Weight of sections |
Banded details |
A x B |
C x D |
E |
F |
kg |
no. |
weight
kg’s |
mm |
mm |
mm |
mm |
600 x 450
750 x 600 |
845 x 680
865 x 715 |
110
110 |
120
120 |
46
67 |
10
10 |
1010
1220 |
Top sections for metal cover and frame weights and dimensions
| To suit chamber sections |
Overall dimensions |
Effective
depth of sections |
Overall
depth of
sections |
Weight of sections |
Banded details |
A x B |
C x D |
E |
F |
kg |
no. |
weight
kg’s |
mm |
mm |
mm |
mm |
600 x 450
750 x 600
1000 x 675 |
825 x 675
870 x 720
1150 x 825 |
60
50
60 |
85
60
60 |
42
44
89 |
20
20
10 |
840
880
890 |
Top sections
Top sections for 750mm x 600mm and larger chambers act as reducing slabs, enabling standard 600mm x 450mm covers to be fitted irrespective of the size of chambers involved.
To provide concrete top section for 1000mm x 675mm requires:
- Top section for metal cover and frame 1000mm x 675mm (i.e. reducer).
- Top section for concrete cover 600mm x 450mm and concrete cover slab.
Concrete cover slabs
Concrete cover slabs are supplied to suit the top sections, and are 695mm x 540mm overall, 60mm thick and weigh 55kg.
600mm x 450mm top section for concrete cover
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600mm x 450mm top section for metal cover
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1000mm x 675mm top section
for metal cover/reducing slab |
600mm x 450mm concrete cover slab
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CPM house inspection chambers can be jointed quickly and easily with bituminous or butyl compounds providing a watertight seal without the use of a concrete surround.
unit nominal size (mm) |
600 x 450 |
750 x 600 |
1000 x 675 |
sealant length
(per joint) |
2.5m |
3.0m |
3.5m |
sealant size |
6mm x 50mm |
12mm x 60mm |
primer |
5 litres per 100m |
5 litres per 75m |
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