|Height - Extended||1100-6100 mm (43.3-240.2 in)|
|Shield Centers||1500-2050 mm (59-80.7 in)|
|Shield Density||up to 111 tonne/m2 (12.5 ton/ft2)|
Steep grades, very thick and very thin seams, unstable roofs and massive sandstone plates, soft ground and geological faults. These varying conditions require a high level of adaptation to specific requirements. Cat roof supports are world-renowned for their reliability under the most extreme conditions. With superior availability and unparalleled quality in design and production, our roof supports set the standard in longwall mining.