Manhole Boxes

About Manhole Boxes

For rapid construction of manhole chambers and interceptors with each box being assembled and installed quickly and without the need for an operative to enter the unsupported excavation.

  • Can be used in trenches up to 5.5m deep in conjunction with up to two top extenstion units
  • Five panel lenghts are available to suit all common pre-cast ring sizes.
  • Manhole boxes may be installed in either a pre-dug trench in stable ground, or by a progressive 'dig and push' method.
  • Handrail panels are available for this product.
  • Four-way handling points to aid safe assembly.

Maximum panel pressure must not be exceeded.

Specification 2.5m 3m 3.5m 4m 4.7m 5m
Plate Height (m) 2.5m (base)
1.5m (top)
2.46 (base)
1.4 (top)
2.5 (base)
1.5 (top)
Plate Thickness (mm) 107 100 127
Weight of Plate (kg) 1045 (base)
745 (top)
1163 (base)
824 (top)
1282 (base)
903 (top)
1400 (base)
982 (top)
1450 (base)
900 (top)
2075 (base)
1475 (top)
Manhole Ring Dia (mm) 1050, 1200, 1350 1350, 1500, 1800 1800, 2100 2100, 2400, 2700 2700, 3000 2700, 3000, 3660
Max Trench Depth (m) * 5.5 5.26 5.5
Internal Width (m) 1.31 - 5.11 (strut length + 900mm) 4.5 2.794 - 6.394
External Width (m) 1.53 - 5.33 (strut length + 1120mm) 4.7 3.047 - 6.647
Clearance Below Strut (m) 1.5 1.5 1.4

* Maximum depth is based on one base and two top extensions being connected together

 

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