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NFPA 520 地下空间标准
日期:2012-02-08 15:30
and pedestrian tunnels (h) Aboveground buildings with belowground stories (i) Cut and cover underground structures specifically addressed in the building code


Safeguard people and property against fire and related hazards in subterranean spaces with the 2010 NFPA 520.
NFPA 520 Standard on Subterranean Spaces covers subterranean spaces that are developed for public assembly, business, manufacturing or other uses which are unique environments and present many special fire and life safety conside

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