This construction video tutorial will teach you how to calculate the cutting length of triangular stirrup.

The length of the column is given as 600 mm and width is given as 500 mm. Diameter (d) of the stirrup is given as 8 mm. Clear cover for both sides is taken as 40 mm. Center to center length of the main bars is taken as a (512 mm) and center to center width is taken as b (412 mm).

Given below, the process, how the above center to center values are derived:-

a = 600 – (2 x 40) – (2 x 4) (4 means half of diameter 8 mm) = 512 mm

b = 500 – (2 x 40) – (2 x 4) (4 means half of diameter 8 mm) = 412 mm

The following formula is used to find out the cutting length

= (2 x H) + a + (2x10xd) (as there are two hooks and length of one hook is 10 mm; dia means dia of stirrups) – (4x3xd) (there are 4 bends and each bend is located at 90 degree angle and for each bend 3d has been deducted, here dia means dia of stirrups)

Pythagorean theorem is used to find out the value of H. It is a basic relation in Euclidean geometry between the three sides of a right triangle. It expresses that the square of the hypotenuse (the side located reverse of the right angle) is identical to the sum of the squares of the other two sides.

In order to learn how the value of H is derived, watch the following construction video tutorial

Video Courtesy : L & T - Learning Technology