Question

In single joist timber floors, the depth of the joists is calculated using the formula _______

(a) Depth = (4 x spanning metres) + 5 cm

(b) Depth = (5 x spanning metres) + 4 cm

(c) Depth = (4 x spanning metres) + 8 cm

(d) Depth = (8 x spanning metres) + 4 cm

The question was posed to me in semester exam.

My question is based upon Types of Upper Floors topic in division Floors and Flooring of Construction & Building Materials

Answer 1

Right answer is (a) Depth = (4 x spanning metres) + 5 cm

To explain I would say: In single joist timber floors, the depth of the joists is calculated using the formula – Depth = (4 x spanning metres) + 5 cm. Single joist timber floors are the simplest type of timber floors which are widely used for residential buildings.