ASME BTH-1 Members (2017)

ASME BTH-1-2020 covers structural design criteria for below-the-hook lifting devices. The standard defines allowable stress methods for structural members and includes formulas, correction factors, and design margins applicable to lifting beams, spreader bars, and similar mechanical lifting attachments.

This edition supports the following symmetrical cross-sections:

• Double symmetric I-shapes
• Single symmetric channels
• Circular tubes and bars
• Rectangular tubes and bars

SDC Verifier implements member checks for:

• ASME BTH-1:2017
• ASME BTH-1:2020
• ASME BTH-1:2023

While the core design philosophy remains consistent across versions, minor changes in definitions or factors are version-specific. Users can select the applicable edition based on the client requirement or regulatory need.

These standards complement ASME B30.20, covering:

• Structural criteria
• Mechanical component allowances
• Electrical component selection
• Marking, inspection, and maintenance practices

For engineers, this means a fully integrated BTH-1 compliance workflow inside their FEA model.