Ch. 7 QTO

Question 1

How to calculate backfill?

Answer 1

Subtract volume of concrete from excavation volume then multiply by swell factor to determine volume in loose CY.

Question 2

excavation backfill (LCY) equation

Answer 2

Excavation (BCY) - concrete volume (cy) x swell factor (1.35)/compaction factor (.95)

Question 3

excavation disposal (lcy) equation

Answer 3

Excavation (bcy) x swell factor (1.35) - backfill (lcy)

Question 4

How to quantify structural steel?

Answer 4

Number of pieces for install labor, and weight for OM estimate. include rolled steel. Include additional 15% for connections

Question 5

Quantify bolts?

Answer 5

Bolts are quantified by number for labor productivity

Question 6

Quantify joist?

Answer 6

By length for each type. material and labor may be determined by linear foot.

Question 7

Quantify decking?

Answer 7

By square feet. include additional 10% for lapping.

Question 8

Quantify stairs?

Answer 8

By number of flights, number of landings or length.

Question 9

Quantify dimensional lumber?

Answer 9

by linear foot for listed type then converted to board feet. (BF = (W” x Thick” x length’) / 12”/foot))