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Unbraced Length Calculator

Classifies elements, groups them into physical members and computes major, minor and LTB unbraced lengths for the steel members of a SAP2000 or STAAD.Pro model. For models whose frame members are actually split at the intersection nodes.

Unbraced Length Calculator ⤢
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Key features

  • Important: for models whose frame members are actually split at the intersection nodes — brace points are found at those nodes
  • One tool for both SAP2000 (live link to the open model) and STAAD.Pro (reads the .std file)
  • Classifies columns, beams, horizontal and vertical bracing and cantilevers; edit any of it in the table
  • Groups elements into physical members; for STAAD.Pro an existing DEFINE PMEMBER can be reused
  • SAP2000: computes XLMajor / XLMinor / XLLTB and writes the ratios straight into the Steel Design Overwrites
  • STAAD.Pro: computes LZ / LY / UNB / UNT and writes ready-to-paste commands
  • Brace-point rules editable in Settings, separately for each program

System requirements

Windows / SAP2000 v17+ or STAAD.Pro