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In _____________ floors, the brick arches or cement concrete arches are constructed and these arches rest on the lower flanges of mild steel joists.(a) Filler Joist(b) Pre cast Concrete(c) Jack arch(d) Hollow blockThe question was posed to me during an interview.I'm obligated to ask this question of Floors and its Types topic in section Floors and Flooring of Construction & Building Materials

Answer»

The CORRECT choice is (c) Jack arch

Easiest explanation: In Jack arch floors, the joists in turn raised either on wall around BEAM. The joists are placed at a distance of about 800 MM to 1200 mm Centre to centre. The rise of arches should be 100 mm to 200 mm and the minimum depth of concrete at the Crown should be 150 mm.



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