GB/T 51369-2019 in English

Background of Standard Formulation and Technological Evolution

This standard was compiled based on the project requirements of the Ministry of Housing and Urban-Rural Development in 2009 and was completed by China Mobile Design Institute and 7 professional institutions. Compared with the 2003 version of the specification, the main technical evolution is reflected in:

Core seismic technology system

1. Equipment classification and seismic requirements

The standard divides communication equipment into three categories:

• Frame-mounted equipment: height＞2000mm, requires top + bottom double fixation
• Free-standing equipment: height≤2000mm, requires bottom fixation only
• Desktop equipment: can be placed on a table or in a rack

2. Key formulas for seismic calculations

Benchmark formula for horizontal earthquake action:

F_H = k₁k₂(1+2h/H)αG

Key parameters:

Key points for the implementation of special earthquake-resistant measures

1. Requirements for high-intensity areas (≥8 degrees)

• All rack-type equipment must be fixed with earthquake-resistant splints
• The spacing between wiring rack hangers is ≤1200mm
• The density of diagonal braces is increased by 50%

2. Special requirements for power supply equipment

The height of the guardrail of the battery anti-seismic frame should meet the following requirements:

0.5h ≤ guardrail height ≤ 0.8h (h is the battery height)

Project implementation suggestions

1. Material selection: Class A buildings must use steel with a yield strength ratio of ≤0.85
2. Installation sequence: The sub-racks in the equipment rack should be installed from bottom to top
3. Acceptance focus: Check that the distance between the pin bolt hole and the edge of the anti-slip iron piece is ≥30mm