The thickness of the steel plate at the mast connection is 40mm as shown in the figure.
Thickness of the frame body at the hinge:30mm.
The frame is made of riveting + welding
Electrophoresis anti-rust, secondary painting, anti-rust process.
The thickness of the steel plate of the frame attachment is 10mm
Towing hook with five anchor points.
The counterweight box is made of 5mm steel plate.