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The minimum depth of concrete at the crown in jack arch floors is _________

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The minimum depth of concrete at the crown in jack arch floors is _________

(a) 5 cm

(b) 10 cm

(c) 15 cm

(d) 20 cm

The question was posed to me in an interview.

My query is from Types of Upper Floors topic in section Floors and Flooring of Construction & Building Materials

1 Answer

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Best answer
Correct answer is (c) 15 cm

Easy explanation: The minimum depth of concrete at the crown in jack arch floors is 15 cm. In this type of floors, steel ties rods are also provided at the end span generally spaced at 1.8-2.4 m c/c. These are provided because of the tension developed at the end span.

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