The bottom and sides of combustible cabinets over cooking appliances or tops including a space of 6 inches from the edge of the burners must be protected with at least 5/16 inch sheetrock with a 25 flame-spread. This material must be behind deep-fat fryers, grills, ranges, and other cooking appliances. It must extend 6 inches beyond the edge of the appliance and range hood.
Wash. Admin. Code § 296-150V-1120
Statutory Authority: Chapter 43.22 RCW. 99-18-069, § 296-150V-1120, filed 8/31/99, effective 10/1/99.