As per NBC-2005, the width of main street on which the building abuts shall not be less than
- A7.5 m
- B10 m
- C12 mCorrect
- D15 m
Solution
Concept
Minimum street width for abutting buildings
Formula
NONE
Step-by-step solution
1. NBC-2005 sets requirements for access roads to ensure emergency vehicle access and proper urban density. 2. The width of the abutting street dictates allowable building height and development permissions. 3. Standard guidelines specify that the main street abutting a building must not be less than 12 m in width. Answer: C
Explanation
The National Building Code 2005 sets requirements for abutting street widths to ensure adequate access for emergency vehicles and sufficient natural lighting. The code mandates that the main street on which a building site abuts must have a minimum width of 12 m. Hence, 12 m is the correct specification.
Why the other options are wrong
A) 7.5 m is suitable for minor access streets or service lanes rather than main street frontages. B) 10 m is less than the minimum main street width required by NBC-2005. D) 15 m exceeds the baseline minimum street width requirement set by NBC regulations.
Shortcut
Minimum main street width abutting a building is 7.5 m.
Common mistake
Confusing the minimum main street width for building abutment (12 m) with narrow service lanes or interior access roads (7.5 m).
Correct answer: C) 12 m