. The following items should be noted in chain design.
2.1. The chain dimension should be as exact as possible ,not too loose or too tight.
2.2. The chain can not be twisted as this reduces the load capacity.
2.3. Open link is preferred.
2.4. The initial (static) angle of the chain is important. Normally weight chains are set at a static angle of 15-25oto vertical
and shear chains are set 20-30o to the horizontal. Any failure will cause the chain ineffective.
2.5. All the chains must be with safety factors which should be 2-3 times of the work load.
2.6 Shackle Selection
The dimension of the shackle is usually the same as the dimension of the chain. but if the shackle is required to bear
the same load with the chain, then thicker shackle is prefered.