Sling Angle & Tension Calc

Rigging Safety Check Tool

$0.99 · Designed for iPad. Not verified for macOS.

4,000lb load on a 2-leg bridle at 45 degrees - tension per leg over the WLL? Angle from vertical, design factor, pass/fail per ASME B30. $0.99 one-time, no login. About to pick a load with a multi-leg sling and need to verify the tension per leg is within safe limits? Exceeding the sling angle threshold can cause catastrophic failure. This app computes angle, tension per leg, and design factor for 2, 3, and 4-leg configurations instantly. Enter load weight, sling length, and attachment spread. Get sling angle from vertical, tension per leg, design factor, and pass/fail check against WLL. WHAT IT CALCULATES: - Sling angle from vertical - Tension per leg for 2, 3, and 4-leg hitches - Design factor vs rated capacity - Pass/fail safety check - Horizontal and vertical force components HITCH TYPES: - Vertical hitch - Choker hitch - Basket hitch - Multi-leg bridle (2, 3, 4 legs) KEY FEATURES: - OSHA and ASME B30 angle guidelines - Color-coded safety status - Works completely offline - No account or login required Built for riggers, crane operators, ironworkers, and safety officers.

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Version 1.0.3

The developer, Shanghai Sheyuan Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

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    Accessibility

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    Information

    Seller
    • Shanghai Sheyuan Network Technology Co., Ltd.
    Size
    • 975.9 KB
    Category
    • Utilities
    Compatibility
    Requires iOS 26.2 or later.
    • iPhone
      Requires iOS 26.2 or later.
    • iPad
      Requires iPadOS 26.2 or later.
    • Mac
      Requires macOS 26.2 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.2 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Sheyuan Inc.
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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