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MOSS SCHOOL OF CONSTRUCTION
BCN 3611 – CONST. COST ESTIMATING I
SUMMER A 2019
Homework Assignment #3 (Due on: 05/28/2019 @11:59PM)
32'-0"
3'-0"
ʺ
-2ʹ
3
ʺ
-1ʹ
6
2
BASEMENT AREA
90'-0"
3'-30ʹ-0"ʺ
ʺ
-0ʹ
0
6
32ʹ-4ʺ
40'-0"
8ʺ S.O.G
(30ʹ×15ʹ)
100ʹ-0ʺ
Building
110'-0"
◼ PART 1
1. Use the grid averaging (cross-section) method to estimate the quantity of cut and/or fill required for a
50ʹ × 50ʹ grid with the following existing elevations at its four corners: 90.33ʹ, 98.67ʹ, 92.33ʹ, and 95.25ʹ.
Assume the proposed rough grade is 96.00ʹ for all four corners. (hint: the 96ʹ contour line divides the
cell into two sections with equal areas)
Answer:
1. The average elevation of 4 corners are
90.33ʹ + 98.67ʹ + 92.33ʹ + 95.25′
90.33ʹ + 98.67ʹ + 92.33ʹ + 95.25ʹ
=
4
376.78
=
4
= 94.145
Hence, the average existing ground would be 94.145 elevation
Now, knowing that required 96.00, so, cut of:
= 94.145′ − 96.00
Homework Assignment #3
05/21/2019
Page 1| 2
MOSS SCHOOL OF CONSTRUCTION
BCN 3611 – CONST. COST ESTIMATING I
SUMMER A 2019
= 1.855
Volume of cut
= 50′ 𝑥 50′ 𝑥 1.855
𝑉 = 430.84𝑓𝑡 3
2. Estimate (in loose cubi...