Underbridge Personnel Aerial Platform (50 feet of platform or less) GROUP / Hydraulic Monitor Mixer Box Operator (concrete plant) GROUP / Boom (larger than D-6 and similar) GROUP / Service Engineer (grease rack) Screed Worker GROUP / Type Lifting Device (center mount) (up to and including 25 tons) (Grove Drott P & H Pettibone and similar) Trencher (over 6 feet and 750 H.P. or more) Watch / Parts Worker (heavy-duty repair shop parts room when needed) Repairer Helper GROUP / Wheel Excavator (up to and including 750 cu. yds. per hour) GROUP / Trencher (over 6 feet and less than 200 H.P.) Water Tanker (pulled by Euclids T-pulls DW-10 20 21 or similar) GROUP / Chain Worker (upgraded from Group 3) Straddle Truck (Ross Carrier Hyster and similar) GROUP / Sub-Grader (Gurries or other automatic type) Tractors (D-9 or similar) (all attachments) Tractor (Tandem Scraper) Watch Engineer GROUP / Ladder Trencher (over 6 feet and 200 to 749 H.P.) GROUP / Tandem Cat Trencher (pulling attached shield) GROUP / Tugger Hoist GROUP / Koehring / /