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The size of the door frame (in mm) recommended for the designation 8 DS 20 is __________

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The size of the door frame (in mm) recommended for the designation 8 DS 20 is __________

(a) 890 x 2090

(b) 790 x 1990

(c) 790 x 2990

(d) 890 x 1990

The question was asked in an online quiz.

I'm obligated to ask this question of Size of Doors in chapter Doors, Windows and Ventilators of Construction & Building Materials

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The correct option is (b) 790 x 1990

The explanation: The size of the door opening for the designation 8 DS 20 (in mm) is 800 x 2000. The size of the door frame (in mm) recommended for this designation is 790 x 1990. The size of the door shutter (in mm) recommended for the same is 700 x 1905.

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