توضیحات :
NFPA 80A – Recommended Practice for Protection of Buildings from Exterior Fire Exposures
۲۰۲۲ Edition
Chapter 1 Administration
۱-۱ Scope. This recommended practice addresses separation distances be tween buildings to limit exterior fire spread based on exterior openings and oilier construction features.
۱-۲ Purpose. These recommendations are in tended to provide a reasonable level of protection for combustibles within and on the exterior of a building exposed to an external building fire while effective fire-fighting activity is being contemplated.
۱-۳ Application. The hazards of exposure to a structure from adjacent exposing fires and me multiple conditions under which such exposure can occur make it impossible to develop a table, formula, or set of rules mat adequately covers all conditions. The user of this recommended practice should become familiar with the general d1eory of radiation exposure hazard as outlined in A.3 .3.2.
۱-۴ Units and Formulas. Metric units of measurement in this recommended practice are in accordance with the modernized metric system known as the International System of Units (SI). The liter unit, which is outside of but recognized by SI, is commonly used in fire protection and is therefore used in this recommended practice. In d1is document, values for measurements are expressed in SI units followed by an equivalent English unit. The first stated value should be regarded as the recommendation because me given equivalent value might be approximate .
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