Question

As per IS standard specifications for timber door, window and ventilator frames, the symbolic designation of 12 DT 20 would indicate:

• A. frame of defined shutter door with a width of 12 modules and height of 20 modules
• B. frame of double shutter door with a width of 12 modulus and height of 20 modules
• C. frame of ventilator with a width of 12 modules and height of 20 modules
• D. frame of window shutter door with a width of 12 modules and height of 20 modules.

Answer 1

Answer: (B)