Locking mast is formed by adding alocking device on the non-locking mast. By the locking device, the height of the mast can be effectively kept for a long time, without air pressure
At present, two types of locking masts of lightweight locking mast (A+ with code of X) and heavy duty locking mast (A+ with code of Z) are available. The lightweight locking mast includes the straight pull type (AX) and the oblique pull type (AXt), and the heavy duty locking mast involves integrated type (AZ) and seperated type (AZf). The specifications involve section number, initial height and maximum height.
The lightweihgt locking mast is suitable for masts with small specification and light load; while the heavy duty locking mast is applicable to masts in various specifications.