NFPA 231-1998 Standard for General Storage.
Labeled. Equipment or materials to which has been attached a label, symbol, or other identifying mark of an orga- nization that is acceptable to the authority having jurisdiction and concerned with product evaluation, that maintains peri- odic inspection of production of labeled equipment or mate- rials, and by whose labeling the manufacturer indicates compliance with appropriate standards or performance in a specified manner. Large-Drop Sprinkler. A listed sprinkler characterized by a K factor between 11.0 and 11.5 and a proven ability to meet the prescribed penetration, cooling, and distribution criteria specified in the large-drop sprinkler examination require- ments. The deflector/discharge characteristics of a large-drop sprinkler generate large drops of such size and velocity that they enable effective penetration of a high-velocity fire plume. Listed.* Equipment, materials, or services included in a list published by an organization that is acceptable to the author- ity having jurisdiction and concerned with evaluation of prod- ucts or services, that maintains periodic inspection of production of listed equipment or materials or periodic eval- uation of services, and whose listing states that either the equipment, material, or service meets identified standards or has been tested and found suitable for a specified purpose.
2-1″ Commodity Classification. 2-1.1 General. 2-1.1.1″ Commodity classification and the corresponding protection requirements shall be determined based on the makeup of individual storage units (i.e., unit load, pallet load). 2-1.1.2 Mixed Commodities, Protection requirements for mixed commodities shall not be based on the overall com- modity mix in a fire area. Mixed commodity storage shall be protected by the requirements for the highest commodity and storage arrangement. Exception No. 1: Where in accordance with this standard, up to 10 pallet loads of a higher hazard commodity shag be permitted in an area that does not exceed 40,O00 fi 2 (3716 m2). The higher hazard com- modity shall be randomly dispersed with no adjacent loads in any di- rection (including diagonal). If the ceiling protection is based on Class I or H commodities, the permitted number of pallet loudsfor Class IV or Group A plastics shag be reduced to five. Exception No. 2: Where the higher hazard materials are confined to a designated area and properly protected for that area.NFPA 231 pdf download.