Below are some helpful PDF documents on rigging. A special thanks to Hollowway Houston, Inc. and The Crosby Group, Inc..
Rigging Information: Block and Sheave Inspection – Block Hook Inspection
Rigging Information: Block Concepts – Working with Blocks
Rigging Information: Rigging With Blocks – Sheave Bearings
Rigging Information: Sling Angle Information – ASMEB30.9