Question

When the bridges are extended over long routes or distance then a rocker or a roller is used at the joints. As when the temperature is raised the elongations and the contractions of the joints part are not much affected if the rollers and rockers are used.

(a) True

(b) False

I got this question by my school teacher while I was bunking the class.

My question is taken from Simple Trusses in section Structural Analysis of Engineering Mechanics

Answer 1

Right option is (a) True

Explanation: The roller and the rockers take over the elongations and the contractions of the joints part. And thus help in stabilising the structure. Thus when the bridges are extended over long routes  a rocker or a roller is used at the joints.