The Mini-Manhole Box is always used when the job leads to a manhole structure; the working trench needs to become wider before you can continue with the pipe installation. These special trench boxes provide complete protection for the workers.
The trench shoring plate body is designed as an U-form and allows a 1.0 m wider trench support. Extra panels are positioned at a right angle and are firmly connected to the main panel on each side, preventing stones and soil from slipping into the trench.
Before and after the Mini-Manhole Box, normal trench shoring boxes guarantee the trench safety. The spindles as well as accessories correspond to those of the Minibox (Lightweight Box).
The Mini-Manhole Box is a small and lightweight trench box, which can be easily handled by rubber tire backhoes or small excavators.
The Mini-Manhole Box can be installed to a depth of up to 3.0 m using a base and a top box. The shoring box is placed in the pre-excavated trench (place in position). Therefore, the soil has to be temporary stable and the excavation area must be outside the sphere of buildings and structures. The use of the Lightweight Box is recommended if settlements are acceptable.
Plates are available at a length of 2.0 – 3.0 m covering a wide range of applications and providing high flexibility. Depending on the height of the base box, a pipe clearance of ~ 1.0 m is provided.
The Minibox struts type A-E are adjustable for a trench width of 1.65 m to 3.73 m.
