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NASCLAProject Mgmthard22% of exam part

Your project requires coordination between structural steel erection and concrete placement. The steel subcontractor can erect 50 tons per day, and you have 800 tons total. Concrete can be placed 2 days after steel erection begins in each area. If concrete crews need 12 days total, when should concrete operations start to finish simultaneously with steel?

Correct Answer

B) Day 6

Steel duration: 800 ÷ 50 = 16 days. Steel finishes day 16. Concrete needs 12 days and must finish day 16, so concrete starts day 5. With 2-day lag after steel start, concrete can begin day 3, but to finish simultaneously: 16 - 12 + 2 = day 6.

Answer Options
A
Day 4
B
Day 6
C
Day 5
D
Day 7

Why This Is the Correct Answer

Steel duration: 800 ÷ 50 = 16 days. Steel finishes day 16. Concrete needs 12 days and must finish day 16, so concrete starts day 5. With 2-day lag after steel start, concrete can begin day 3, but to finish simultaneously: 16 - 12 + 2 = day 6.

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