Question

The general value of lift for concrete is taken as __________________

(a) 1.5 m

(b) 2.5 m

(c) 3 m

(d) 4 m

I had been asked this question by my college director while I was bunking the class.

This intriguing question comes from Gravity Dams in section Gravity Dam Design and Construction of Irrigation Engineering

Answer 1

Right answer is (a) 1.5 m

The best explanation: The concrete is poured from a certain height in the first attempt and this height is called a lift. Maximum height of single pour of concrete is usually about 1.5 m. If this is reduced, more horizontal joints will get developed.