A code reference table lists elevator pit depth requirements as follows: 'Minimum 2 ft for speeds ≤50 fpm; 4 ft for speeds 51–150 fpm; 6 ft for speeds above 150 fpm.' For an elevator rated at 125 fpm, the required minimum pit depth is:
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A
2 feet
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B
4 feet
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C
5 feet
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D
6 feet