Backhoe Manhole Box

The Backhoe Manhole Box is lightweight and ideal for installing pre-cast manhole rings and trench runs, without the need to alter the trench width. It has a typical base weight of 912kg, and is suitable for excavations up to 4.0m deep. It has a simple pinned strut arrangement, with a range of strut lengths available for non-square configurations and a 1.2m clearance under the bottom strut. End closure panels are available to support the open ends of the box, and handrails can be added for extra safety.

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A lightweight manhole box ideal for use with 180 degree rubber tyred excavators
Typical base weight from 912kg
Suitable for excavation depths up to 4.0m
1.2m clearance under bottom strut
End closure panels and handrails available
Four way handling point to aid safe assembly

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Type	2.0m		2.5m		3.0m		3.5m
Type	Base	Top Ext	Base	Top Ext	Base	Top Ext	Base	Top Ext
To suit manhole ring size (mm)	1050/1200		1050/1200		1350/1500/1800		1800/2100
Strut Length (mm)	850		1300		1800		2300
Plate Length (m)	2.0		2.5		3.0		3.5
Plate height (m)	2.0	1.0	2.0	1.0	2.0	1.0	2.0	1.0
Plate thickness (mm)	60		60		60		60
External trench width (m)	1.47 - 2.00		1.47 - 2.50		1.47 - 3.00		1.47 - 3.50
Internal trench width (m)	1.35 - 1.88		1.35 - 2.38		1.35 - 2.88		1.35 - 3.38
Weight (kg)*	914	477	965	506	1128	637	1316	743
Distance between struts	1.84		2.34		2.84		3.34
Strut Clearance Height (m)	1.2	N/A	1.2	N/A	1.2	N/A	1.2	N/A

FAQs

Related Files

(2.21 MB)

Manhole Box Technical Literature

(1.56 MB)

Backhoe Manhole and Trench Boxes User Guide

(597.97 KB)

Backhoe Trench & Manhole Boxes Technical Literature

(3.85 MB)

Manhole Box User Guide

Trench Boxes: Typical Installation Methodology

This quick and easy method ensures ground stability within a trench and helps minimise the excavation area to avoid damage to neighbouring structures and utilities in the ground. This methodology is best suited for trench boxes with shorter struts, if you use a trench box with long struts then other methods may be more suited, if you have any questions on different methods you can use contact our technical department.

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