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Part 4: Trench Excavation and Backfill, Concrete, and Formwork Calculations (20 Points) Perform a quantity takeoff of the trench shown below in plan and section view. Wall Thickness = 2 feet (2'). Ignore Rebar. Remember to show your work! Calculate the following: a. Average Trench Depth b . Trench Centerline Length c. Average Trench Width d. Volume of Excavation e. Volume of Backfill f . Volume of Surplus Material . SF of Formwork Required for Concrete Footing h. SF of Formwork Required for Concrete Wall i. Quantity of Concrete Required for Concrete Footing j. Quantity of Concrete Required for Concrete Wall Be sure to use proper units for each quantity. After calculating the values above, fill out the quantity takeoff sheet provided. X = EI. 42.8' X = El. 35.4' 10' 45' 35' 60 2' Wide X = El. 28.3' X = El. 37.5' T PLAN VIEW 6' Above Avg. Grade AVG. Grade EI. 1' Work 1' Work Area Area Concrete Footer: 1' 6" Tall x 4' Wide Bot. El. 30' SECTION VIEW