توضیحات :
NFPA 520 – Standard on Subterranean Spaces
۲۰۲۱ Edition
Chapter I Administration
۱-۱* Scope.
۱-۱-۱ This standard addresses the safeguarding of life and property against fire, explosion, and related hazards associated with developed subterranean spaces.
۱-۱-۲ This standard does not cover the following types of subterranean spaces:
(۱) Tourist caverns
(۲) Wine storage caverns
(۳) Gas and oil storage reservoirs
(۴) Hazardous waste repositories
(۵) Utility installations such as pump stations
(۶) Working mines
(۷) Transportation and pedestrian tunnels
(۸) Aboveground buildings with belowground stories
(۹) Cut and cover underground structures specifically addressed in the building code
۱-۲ Purpose. The purpose of this standard is to provide minimum requirements for the design, operation, and maintenance of developed subterranean spaces for safety to life and property f mm fire and similar hazards.
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