Includes yard employees. This classification shall apply to hoisting or lifting operations requiring the use of mobile hoisting equipment, block and fall, jacks, shoring timbers, rollers, ropes, and cables including transportation of such equipment to and from work sites. Shall not be assigned to a risk engaged in both hoisting and construction operations at the same job or location. The entire payroll in connection with such project, including the payroll developed in the operation of the mobile crane shall be assigned to the applicable construction classification.