Single-Row Racks : Racks that have no longitudinal flue space and that have a depth up to 6 ft (1. 8 m) with aisles having a width of at least 3. 5 ft (1. 1 m) between loads on racks
NFPA 1 Fire Code, National Fire Protection Association (NFPA), MA, USA 2009 ed. https://law.resource.org/pub/us/code/ibr/nfpa.1.20 03.pdf, (Code: Nat Fire Protection Association Fr&LfSf Requir - Amer) {171 NFC}
