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The BIS recommends that the size of a door frame and window frame should be derived after allowing a margin of______ mm alround an opening for convenience of fixing.(a) 2 mm(b) 6 mm(c) 5 mm(d) 10 mmI got this question during a job interview.My doubt stems from Components of a Door topic in division Doors, Windows and Ventilators of Construction & Building Materials

Answer»

Correct CHOICE is (d) 10 mm

Easiest explanation: The width and height of an opening is INDICATED by NUMBER of MODULES where each module is of 100 mm. The height of opening for door is considered from below the floor finish to the bottom of lintel.



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