Question

In reinforced concrete floors, the movement joints should normally be spaced at a maximum spacing of ____________

(a) 6 m

(b) 4.5 m

(c) 7.5 m

(d) 9 m

The question was posed to me in an online quiz.

The question is from Joints Provision and Water Bars in RCC Ducts of Aqueducts topic in portion Cross Drainage Work of Irrigation Engineering

Answer 1

Right choice is (c) 7.5 m

To explain: The concrete floor should be cast in panels with sides not more than 4.5 m in case of floors with a nominal percentage of reinforcement. The movement joints should be placed at a maximum spacing of 7.5 m for reinforced floors in two directions at right angles.