Fulfilment of the intended purpose requires conformance to SAE J1194@ and the following additional requirement of a drop test to verify the effectiveness of the overhead cover in protecting the operator from falling objects. The test procedures and performance requirements outlined in the standard are based on currently available engineering data. PURPOSE: The purpose of this standard is to establish the test and performance requirements of a protective frame or enclosure with overhead cover designed for wheel-type agricultural tractors to minimize the frequency and severity of operator injury resulting from accidental upsets and overhead hazards during normal operation. General requirements for the protection of operators are specified in SAE J1194.