Civil engineering $....$ A catenary is the curve that an idealized hanging chain or cable assumes under its own weight when supported only at its ends. In civil engineering, catenary cable sag refers to the vertical distance between the lowest point of the cable and a straight line joining the two supports. This sag is influenced by factors such as the weight of the cable, the tension in the cable, and the distance between supports.

The distance between supports, also known as the span, is the horizontal distance between the two points where the cable is supported. It plays a significant role in determining the sag of the cable. Longer spans generally result in greater cable sag, while shorter spans lead to less sag.

Objective Question:

What factor primarily influences the sag of a catenary cable in civil engineering?

A$)$ The material composition of the cable

B$)$ The distance between supports

C$)$ The angle of inclination of the supports

D$)$ The environmental temperature fluctuation