Dan Hoffman

Slings & Bridles

Slings & Bridles is a practical rigging calculator designed for professionals who need fast, reliable insight into lifting geometry and sling forces.

The app helps you visualize and calculate loads in two-leg and multi-leg bridle configurations, translating real-world dimensions into clear forces you can evaluate before a lift. By entering span, leg lengths, and load, you can immediately see hook height, leg angles, and resulting tensions—presented alongside a clean, intuitive diagram.

Built with stagehands, riggers, and technicians in mind, Slings & Bridles focuses on clarity over complexity. Inputs are validated to flag impossible or unsafe configurations, helping you catch geometry problems early—before they become field problems. The app adapts to both imperial and metric units, making it useful across disciplines and job sites.

This tool is intended for planning, education, and verification, not as a substitute for professional judgment or applicable codes. It’s a fast way to sanity-check assumptions, explore “what-if” scenarios, and better understand how changes in geometry affect load distribution.

Whether you’re prepping a lift, teaching fundamentals, or double-checking a calculation on site, Slings & Bridles gives you a clear picture of what’s happening above the hook.