Solid Shelving 1 : Shelving that is solid, slatted, or of other construction, that is located in racks, and that obstructs sprinkler discharge down into the racks
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}