Storage on structures that are less than 0. 75 m (2 1/2 ft) deep, with shelves usually 0. 6 m (2 ft) to 0. 9 m (3 ft) apart vertically and seldom exceeding 4. 5 m (15 ft) in total height
NFPA 30B Code for the Manufacture and Storage of Aerosol Products, 2002 ed. http://www.nfpa.org/assets/files/AboutTheCodes/30B /30B-A2002-rop.pdf, (Code: Code for the Mfg and Storage of Aerosol Prod for the Mfg and Storage of Aerosol Prod - Amer) {194 NFC}