The five different types of roof structures are:

The ARC ROOF – a small roof system for light-duty use. Build as a fixed portal structure, based on H30D truss.

The TUNNEL ROOF - a very flexible and versatile mid-range roof system. Based on elements of the ARC ROOF the TUNNEL ROOF is developed as an arched roof system with variable depth.

The MPT ROOF – a mid-range roof system, available in 4 different standard sizes. Based on the MPT ground support system and H30D and H40V truss. Can be used with either hand or electrical hoists.

The ST ROOF system – a large, heavy-duty roof system, available in 3 different standard sizes. Based on the ST ground support system and S36R and S52SV truss.

The LT ROOF system - a flat grid system with tent profiles on top, available in different sizes. Based on either ST or CT ground support towers and B100RV and S100F truss.

The base of the LT, ST and MPT ROOF is a ground support system. This means that the entire construction can be build from ground level and brought to working level when finished with the use of the tower and sleeve block construction.

The ARC system is erected manually.

The TUNNEL ROOF can be erected manually with the help of material lifts.