A sanitary line must fall at 1.2 percent over a 350 ft horizontal run. What invert drop should be shown between the two structures?
Correct Answer
A) 4.2 ft
1.2% = 0.012 foot of fall per horizontal foot. The invert drop is 350 × 0.012 = 4.2 feet. This uses the specified design slope; it does not establish the minimum allowed for every sanitary pipe size or jurisdiction.
Why This Is the Correct Answer
1.2% = 0.012 foot of fall per horizontal foot. The invert drop is 350 × 0.012 = 4.2 feet. This uses the specified design slope; it does not establish the minimum allowed for every sanitary pipe size or jurisdiction.
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