The 400 series system is a combination of strut supported plates and sheet piles. It is recommended for excavation depths of up to 6.00 m.
It is particularly useful in excavation jobs where shoring must precede excavation, but also in cases where we have to deal with existing networks, transverse to the excavation.
The plates of the system are connected to each other with the common spindle struts (031/085) of the boxes and have sliding slots for light type (KD 6/8) overlapping trench sheets (without interlocks). The plates with the sliding slots ensure the position, distance and verticality of the trench sheets, while in combination with the struts act as their internal support (wallers). Additional internal support, at a greater depth than the plates, can be achieved with the use of extra waller beams and struts.