A-Frame 40 Te WLL

 A-Frame with 40 Te working load limit available for sale (Ref.: DS33)

The A-Frame consists of a rigid frame pivoting on to supports mounted directly on the ship's deck. The rigid frame has three main components: two arms and one square section cross beam. The two arms are rigidly connected with the crossbeam. The arms are connected to the crossbeam with square plate flanges using bolts. The accurate positioning of the cross beam into the A-Frame legs by bolted joints.

Each arm is driven by a hydraulic cylinder. The hydraulic cylinders are connected to the arms with eyes and pins. The cylinder is connected on a deck mounted support also with eyes and pins. When the rod of the cylinder is fully retracted the A-Frame is in its maximum inboard position. When the rods are extended the A-Frame starts to rotate around its pivoting axis and it reaches its final maximum overboard position when the hydraulic cylinders reach their maximum extended length. To move back the A-Frame in its inboard position the cylinders are retracted back. Due to the hydraulic control system and the method of mechanical attachment to the A-Frame cylinders works synchronously. The A-Frame and Auxiliary Winch will be controlled via 3 position, spring return to centre directional control valves.

The A-Frame and Working platform are manufactured in modular segments, so that is can be disassembled to allow for standard road transportation.