1.1 This specification covers heavy-duty ranges that use gas or electrical heat sources, or both, for cooking food in the commercial and institutional food service establishments.1.2 The values stated in inch units are to be regarded as the standard. The SI values given in parentheses are provided for information only.1.3 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associa