This specification covers multiple tank automatic rack-type commercial dishwashing machines. Dishwashing machines shall be of the following types, styles, and classes, as specified: Type I-this machine shall be designed and supplied to accept the feeding of soiled tableware from the right side, when facing the front of the machine; and Type II-this machine shall be designed and supplied to accept the feeding of soiled tableware from the left side, when facing the front of the machine. Style 1 - steam heated; Style 2 - electrically heated; Style 3 - gas-heated; and Style 4 - pre-wash unit. Class A - injectors; Class B - heat exchange coils; Class C - natural gas; and Class D - LP gas. The construction requirements; electrical, steam and gas equipment requirements; lubrication requirements; treatment and painting requirements; and performance requirements are presented in details.