Type 2.0m 2.5m 3.0m 3.5m
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

Why Choose a Backhoe Manhole Box for your excavation project?

Due to their lightweight characteristics, Manhole Boxes are particularly useful for shoring contractors using smaller 180° rubber tyred excavators.


What site scenarios most suit a Backhoe Manhole Box?

Backhoe Manhole Boxes are ideal for use on building sites and construction projects where small excavator handling is essential.


Which applications most suit a Backhoe Manhole Box?

Backhoe Manhole Boxes are ideal for installing pre-cast manhole rings and for use in trench runs, without the need to alter the trench width.


What makes Backhoe Manhole Boxes so light?

Backhoe Manhole boxes use lightweight yet robust panels and have their own dedicated strutting system to help keep the overall weight  down to a minimum.


What size of excavation suit Backhoe Manhole Boxes?

They are suitable for use in trenches from 1.47 to 3.5m wide x 4m deep in most soil types.


Are top box extensions available for Backhoe Manhole Boxes?

Yes, a top extension box can be added to achieve up to 4m depth.


What type of struts are used in a Backhoe Manhole Box?

Backhoe standard fixed length struts are typically used for Backhoe Manhole Boxes to achieve square box configurations.


Do Groundforce offer training courses?

Groundforce Training Services offer Industry leading accredited safety training primarily for those working in utilities, construction and civil engineering. From short duration health and safety awareness to more complex or specialist safety consultancy solutions.


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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