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| Q. |
The number of treads in a flight is equal to |
| A. | risers in the flight |
| B. | risers plus one |
| C. | risers minus one |
| D. | risers plus three |
| Answer» C. risers minus one | |
| Explanation: it is often not simply the sum of the individual tread lengths due to the nosing overlapping between treads. if there are n steps, the total run equals n-1 times the going: the tread of the last step is part of a landing and is not counted. | |
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