Cargo Securing Method Using Steel Chains for Portable D-Rings

To securely fasten the cargo to the portable D-ring, six steel chains with a capacity of 20T were used. These chains were positioned at an angle of 45-90 degrees in relation to the athwartship direction. Additionally, on the opposite side, six steel chains of identical specifications were directly attached to the other cargo in a transverse manner. The cargo in the middle was connected to both side cargos with six lines of steel chain on each side in a transverse direction.