Underbridge Personnel Aerial Platform (50 feet of platform or less) GROUP / Hydraulic Monitor Mixer Box Operator (concrete plant) GROUP / Roller (5 tons and under) Tugger Hoist 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 / 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 / Rubber-Tired / Sub-Grader (Gurries or other automatic type) Tractors (D-9 or similar) (all attachments) Tractor (Tandem Scraper) Watch Engineer GROUP / Equipment Operators Classifications GROUP / Tandem Cat Trencher (pulling attached shield) GROUP / Rubber-Tired Earthmoving Equipment (over 31 cu. yds.) (657B and similar) Wheel Excavator (up to and including 750 cu. yds. per hour) GROUP / /