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In the designation 8 DS 20, the letter D stands for __________

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in Construction & Building Materials by (189k points)
In the designation 8 DS 20, the letter D stands for __________

(a) Window opening

(b) Single shutter

(c) Double shutter

(d) Door opening

I got this question in final exam.

Query is from Size of Doors in division Doors, Windows and Ventilators of Construction & Building Materials

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Best answer
Correct choice is (d) Door opening

To explain: The designation 8 DS 20 denotes a door opening with single shutter where the letter D stands for door opening and the letter S stands for single shutter. It tells that the width of the door opening is 8 modules i.e. 800 mm and height is 20 modules i.e. 2000 mm.

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