Using the fall and run shown on the profile, what slope percentage is indicated?
Correct Answer
A) 2.2%
The profile shows 4 ft of fall over 180 ft of run, which is 2.2%.
Why This Is the Correct Answer
The profile shows 4 ft of fall over 180 ft of run, which is 2.2%.
Why the Other Options Are Wrong
Option B: 1.7%
This uses a longer run than the run dimension printed on the profile.
Option C: 2.8%
This adds 1 ft of fall that is not shown.
Option D: 5.8%
This mixes feet with percent instead of dividing fall by run.
Memory Technique
spot elevation slope check slope cue: fall is the top of the fraction, run is the bottom.
Reference Hint
Open Sheet C-874; read the profile fall and horizontal run before calculating slope.
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