See our Blocks, Pulleys, and Sheaves Knowledge Base for more info.
Make your next rigging project easier with our wide assortment of rigging blocks and sheaves for sale at E-Rigging. As a leading supplier of rigging products, it’s our priority to provide you with top-quality parts and accessories at an affordable value. To ensure reliability and durability, all of our blocks, sheaves, and steel cable pulleys are made of superior quality steel that’s crafted to last. Browse our selection of quality rigging blocks and sheaves above! If you’re unsure what block, sheave, or steel cable pulley will work best for your needs, feel free to contact us. We’re happy to work with you to help you find the perfect solution!
Work Load / Stress Formula / Load Calculation
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The capacity at which our products can be safely used has been established through an accredited testing laboratory. This may be defined as the safe working load limit, or cable rope pulley block load calculation, or a force calculator. The safe working load limit (mechanical advantage) is the maximum load in pounds which should ever be applied, and when the load is applied uniformly and in direct tension to a straight segment of wire rope. By changing the degree of angle between lead and load angle, this also affects the stress on the block. The stress on the eye may be decreased by increasing the angle between the load and the lead angle. See chart and illustration below.
Stress Formula: (L x A = S)
Load in pounds (L) multiplied by the Angle of pull (A) equals the stress generated in lbs on the Block (S).
Safe Work Load Limit: This is the maximum load (in lbs.) which can be applied to the Block and which has been established (Load Capacity).
