A fire department access road shall be provided such that any portion of an unsprinklered facility is located no more than what maximum distance from…

NFPA 1, Fire Code, mandates that fire department access roads be positioned so that any portion of an exterior wall of the first story of a building is no more than 150 ft (46 m) from the road. This distance is measured by an approved route around the building's exterior. The 150 ft requirement is a baseline established to ensure that firefighting crews can effectively deploy handlines from their apparatus to any part of the building. This distance is specifically the maximum for facilities that are not protected by an automatic sprinkler system. For sprinklered buildings, this distance may be permitted to be increased by the Authority Having Jurisdiction (AHJ).

A. 50 ft (15 m) is overly restrictive and not the standard maximum distance specified in the code for general access.

C. 300 ft (91 m) exceeds the maximum allowable distance for an unsprinklered facility and is typically associated with sprinklered buildings.

D. 450 ft (137 m) is the maximum distance generally permitted, but only for buildings fully protected by an automatic sprinkler system.

1. NFPA 1, Fire Code, 2021 Edition. Chapter 18, Section 18.2.3.2.2. "Fire department access roads shall be provided such that any portion of the facility or any portion of an exterior wall of the first story of the building is located not more than 150 ft (46 m) from fire department access roads..."

2. NFPA 1, Fire Code, 2021 Edition. Chapter 18, Section 18.2.3.2.2.1. This section details the conditions under which the 150 ft distance can be increased, primarily when a building is "equipped throughout with an approved automatic sprinkler system."

3. SFPE, SFPE Handbook of Fire Protection Engineering, 5th Edition. Chapter 61, "Fire Department Operations," Section 61.4.2, discusses apparatus placement and hose line stretches, which provides the operational basis for the access road distance requirements found in codes like NFPA 1.