Your Complete Field Reference for Heavy Lifting, Load Calculations & Rigging Safety

The Master Rigger Reference Card is the ultimate quick reference tool for riggers, crane operators, and lift planners who need accurate load calculations on the job. Built for durability and precision, this laminated, pocket sized card combines essential rigging math, safety standards, load factors, and sling data — making it a must have for professionals performing complex lifts or heavy rigging work.

Key Features & Technical References

• Coefficients of Friction on Level & Incline Planes
  Quickly determine the pulling force needed for loads on various surfaces or slopes. Includes coefficients for steel, concrete, wood, metal, and ice, plus illustrated formulas for uphill, level, and downhill applications. Example calculations show how to measure the resistance of a 30,000‑lb load on a ramp with real‑world accuracy.

• Weight Estimation
  Features practical formulas and diagrams to help estimate the weight of common construction materials and loads. Weight estimation is critical for planning safe lifts when the load’s exact mass isn’t known. By calculating approximate weights based on material type and volume, riggers can ensure proper equipment selection, load balance, and sling configuration before any lift begins. Helps prevent overload situations and improves job site safety through accurate pre‑lift assessments.

• Rigging Formulas & Sling Tension Calculations
  Includes the essential Sling Tension Formula for estimating how much tension each sling leg experiences for level and off level pick points and asymmetrical loads. As the sling angle gets smaller (more horizontal), the tension on the sling increases — a key factor for safe load management. Perfect for quick, on‑the‑spot calculations in the field.

• Heavy Lifting Sling Capacities Chart
  Comprehensive reference for wire rope, web, and polyester round slings with rated capacities by size and material type. Includes standard sling color codes, diameters, and capacity tables for fast, accurate selection on the job.
• Angle of Choke & Adjustable Hitch Reference
  Visual guides show rated capacity percentages by choke angle and how adjustable hitches distribute uneven loads. A critical aid for optimizing lift efficiency and maintaining safety during variable load handling.
• Formulas, Legends & Example Applications
  Each formula section includes a legend and illustrated example, simplifying complex rigging math for quick reference and training purposes.
• Rugged, Field‑Ready Construction
  Built from laminated, oil‑ and moisture‑resistant material, this card is designed to survive harsh environments and daily job‑site use.
• Compact and Portable Design
  Convenient pocket size fits your gear bag, vest, or clipboard — always accessible when you need vital rigging data.

Perfect For:

• Certified riggers and crane operators
• Construction and industrial lifting crews
• Safety trainers and compliance officers
• Lift planners, inspectors, and engineering teams

Why Choose This Card

Designed for real world rigging professionals, this powerful reference card combines weight estimation, sling capacity charts, load factors, and rigging formulas in one streamlined tool. It saves time, prevents calculation errors, and enhances safety on every lift.