Reviews the basic categories associated with safe rigging practices, including the calculations required before determining the size of the equipment to be utilized (i.e., ropes, slings, shackles, blocks, etc.).
These calculations are essential to the development of proper rigging techniques to be implemented prior to climbing an antenna supporting structure.
- Determining the Working Load Limit (“WLL”)
- Wire rope capacity: size, nominal strength, and weight per foot
- Calculate D/d ratios
- ANSI B30.16 D/d ratio allowances
- Blocks, sheaves, shackle sizes, and wire rope slings
- De-rate WLL