Chock shields supports always have 4 hydraulic legs and all 4 legs are connected to the canopy of the support. The legs of a chock shield support are either vertical or inclined but the majority of chock shields have inclined legs as this provides better support pressure to the canopy.

The main features of chock shield supports are:

• The four legs act directly onto the canopy
• The yield load is constant throughout the height range
• The top canopy can be either rigid or articulated
• The base unit is rigid but has no leg mountings