Principles of Building Planning MCQ with answer and solution

Concept

Standard plinth height for buildings

Formula

NONE

Step-by-step solution

1. The plinth level raises the ground floor above surrounding ground level to prevent surface water inflow. 2. Standard building practice generally specifies a plinth height of 0.45 m for residential and commercial buildings. 3. Therefore, the plinth height commonly provided is 0.45 m. Answer: B

Explanation

The plinth height is the elevation of the ground floor above the surrounding road or ground level, protecting the interior from rainwater ingress, surface runoff, and dampness. A height of 0.45 meters, or 45 centimeters, is standardly provided in building design as an effective and practical clearance. Therefore, 0.45 m is the generally recommended plinth height.

Why the other options are wrong

A) 0.30 m is the absolute minimum plinth height and may not adequately prevent surface water ingress during heavy rains. C) 0.75 m is higher than usual and is generally reserved for flood-prone areas or specific architectural styles. D) 1.0 m is excessively high for standard plinths and increases construction and accessibility costs unnecessarily.

Shortcut

Standard plinth height provided above ground level is 0.45 m (45 cm).

Common mistake

Selecting 0.30 m, which is often inadequate for proper drainage and protection against surface runoff.