Question

The percentage opening is calculated using the formula ___________

(a) (Area of the wall where there is no opening/ Area of opening) x 100

(b) (Area of opening / Area of the wall where there is no opening) x 100

(c) (Area of the total wall / Area of the wall where there is no opening) x 100

(d) (Area of the total wall / Area of opening) x 100

This question was posed to me in an online quiz.

My question comes from Structural Design of Walls in chapter Load Bearing Walls of Construction & Building Materials

Answer 1

The correct option is (b) (Area of opening / Area of the wall where there is no opening) x 100

Explanation: The percentage opening in a wall is given by (Area of opening / Area of the wall where there is no opening) x 100.  The areas are calculated by multiplying the length and the thickness of the wall.