CST 241, Ch 4: Grid and Trenches

If your grid size is 40 ft x 20 ft, what is the area of each grid?

• 800 sq ft

• 80 sq ft

• 600 sq ft

• 60 sq ft

If your Grid Area is 1600 sq ft, what is the Area constant?

• A/4

• 400

• 44

• 4

What modern ways does an estimator use to do a site takeoff? (choose all that apply)

• Sonic digitizer

• Sonic burger

• Tablet digitizer

• On Screen Takeoff

• SWAG

To get the trench volume, the following are used to calculate

• centerline length, average footing width, cutback slope

• centerline width, deepest excavation, footing width

• centerline length, average width, average depth

• centerline length, centerline width, cutback slope

On grid method, the top 2 sections denote New Grade and Existing Grade, what is shown in the bottom 2 sections?

• Depth of footing, width of footing

• Area constant, volume cut

• Depth of cut, depth of fill

• Area constant, average depth

The trench excavation calculated is 300 cu. yds and the backfill amount is 180 cu. yds. How much dirt do you need to have delivered?

• 120 cu. yds

• 480 cu. yds

• 0

• 100 cu. yds

If your new elevation is 5.4 ft and existing elevation is 9.4 ft. What change needs to be recorded on the grid?

• 4 ft cut

• 4 ft fill

• 4.4 ft cut

• 0

Piles can be timber, steel or precast concrete

• True

• False

If a vertical or near-vertical excavation needs to be done, it does not require to be supported by piles, soil nails or some other engineered method.

• True

• False