In mechanical and electrical installation engineering, many practitioners often confuse seismic support hangers with precast hangers, and even assume that the two are interchangeable and can be used interchangeably.

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In fact, the two belong to two dimensions: functional attributes and process attributes, with completely different concepts, functions, and regulatory requirements.

Mixing them can easily lead to design non-compliance, failed acceptance, and residual safety hazards.

This article combines the requirements of national standards such as GB50981-2014 to clearly outline the core differences between the two, helping engineering personnel to accurately select and construct in compliance.

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