PARTNER INSIGHT
Stronger safety and design for single-girder cranes
The Crane Manufacturers Association of America (CMAA) has released the 2025 revision of Specification 74, which strengthens safety and design for single-girder cranes.
he Crane Manufacturers Association of America (CMAA) has released the 2025 revision of Specification 74. The document is the definitive design reference for top-running and under-running single-girder electric travelling cranes using under-running trolley hoists. The updates to CMAA Specification 74 reflect today’s advances in materials, controls and load-handling technologies. The document gives engineers, specifiers and crane owners a clear, current road map for designing, manufacturing and maintaining single-girder cranes. Use of the specification ensures that this type of overhead lifting
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equipment meets expectations for safety, reliability and performance.
Greater clarity and consistency CMAA revises its specifications roughly every five years to reflect new technologies and industry best practices. The 2025 edition incorporates lessons from the field, aligning design guidance with today’s expectations for automated systems, digital controls and improved safety margins. This revision also brings CMAA Specification 74 in closer alignment with related publications from the American National Standards Institute (ANSI), the American Society of Mechanical
Engineers (ASME) and the Occupational Safety and Health Administration (OSHA). CMAA’s objective is to provide greater clarity, consistency and uniformity across crane design, fabrication and operation.
Key changes The updated CMAA Specification 74 extensive updates across structural, mechanical and electrical sections. Revisions include: Structural modifications: The revision incorporates clarified guidance on allowable stress, deflection limits, torsion and wheel load distribution. It also refines runway interface
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Winter 2025 |
ochmagazine.com
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