Backhoe Manhole Box

About Backhoe Manhole Box

Manhole Boxes are similar to trench boxes, however integral end return panels provide additional support making them ideal for installing pre-cast manhole rings trench runs, without the need to alter the trench width.

  • A lightweight manhole box ideal for use with 180 degree rubber tyred excavators
  • Typical base weight from 1100kgs.
  • Suitable for excavation depths up to 4.0m
  • Simple pinned strut arrangement
  • A range of strut lengths is available for non- square configurations
  • 1.2m clearance under bottom strut.
  • End closure panels available to support the open ends of the box
  • Handrails available

Specification

 

2.0m Long 2.5m Long 3.0m Long
Specification Base Top Ext Base Top Ext Base Top Ext
To Suit Manhole Ring Size (mm) 1050 / 1200 1050/1200/1350 1050/1500/1800
Strut Length (mm) 850 1300 1800
Plate Length (m) 2.0 2.0 2.5 2.5 3.0 3.0
Plate Height (m) 2.0 1.0 2.0 1.0 2.0 1.0
Plate Thickness (mm) 60 60 60 60 60 60
External Trench Width (mm) 1.47 - 2.00 1.47 - 2.00 1.47-2.50 1.47-2.50 1.47-3.00 1.47-3.00
Internal Trench Width (mm) 1.35 - 1.88 1.35 - 1.88 1.35-2.38 1.35-2.38 1.35-2.88 1.35-2.88
Weight (Kg)* 912 456 962 526 1126 605
Distance Between Struts B (m) 1.84 1.84 2.34 2.34 2.84 2.84
Strut Clearance Height (m) 1.2 N/A 1.2 N/A 1.2 N/A

* Weights are approximate and may vary with extensions used.