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The thickness of the mild steel plates provided in the centring of cement concrete jack floors is ________(a) 1 mm(b) 3 mm(c) 5 mm(d) 7 mmThe question was asked in an international level competition.My question comes from Types of Upper Floors topic in chapter Floors and Flooring of Construction & Building Materials

Answer»

Correct option is (b) 3 MM

Best explanation: The thickness of the mild steel PLATES provided in the centring of CEMENT concrete jack floors is 3 mm. The centring has a pair of holes at the ends which are spaced at 75 cm c/c. The steel PLATE is bent in the SHAPE of the arch soffit.



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