0:00
in today's video I am going to show you
0:02
a step-by-step guide on how to calculate
0:04
the cutting length of a four-legged
0:06
Stirrup for a column if you are excited
0:09
to learn a practical skill That's
0:11
essential for construction make sure to
0:13
stick around until the end
0:15
we will be working with a column that
0:17
has a width of 400 MM and a depth of 600
0:20
mm the main bars have a diameter of 20
0:23
mm and the stir ups are 8 mm in diameter
0:26
with a clear cover of 40 mm by the end
0:29
of this lecture you will be able to
0:31
confidently calculate the cutting length
0:33
of the stirrups for this scenario but
0:35
before we jump into the calculations
0:37
let's establish the basics
0:40
in four-legged stirrups The Cutting
0:42
length of Stirrup 1 and Stirrup 2 are
0:45
the same so we will find out the cutting
0:47
length of a single stirrup
0:49
the formula to calculate the cutting
0:51
length is given by L equal to twice a
0:54
plus b plus hook length minus 90 degree
0:56
Bend plus 135 degree Bend to know the
1:00
value of a we need to find the value of
1:02
x which is the center to Center spacing
1:04
between the longitudinal bars along the
1:08
the formula to calculate X is given by x
1:11
equal to width of column minus twice
1:14
clear cover plus twice diameter of
1:16
Stirrup plus twice diameter of main bar
1:18
upon 2 whole divided by 3
1:21
the width of column is 450 mm clear
1:24
cover is 40 mm diameter of stirrups is 8
1:27
mm and the diameter of main bars is 20
1:31
on substituting these values the value
1:34
of x will be 111.33 mm
1:37
with the value of x obtained we can
1:40
calculate the dimension a
1:42
a is calculated by using the formula a
1:45
equal to twice X Plus twice half the
1:47
diameter of main bars plus twice half
1:50
the diameter of stirrup on substituting
1:53
these values the value of a will be
1:55
calculated as 250.66 mm
1:58
now let's calculate B which is given by
2:01
the formula column depth minus twice
2:03
clear cover plus twice half the diameter
2:06
of stir up the depth of column is given
2:09
as 600 mm clear cover is 40 mm and the
2:12
diameter of syrup is 8 mm on
2:15
substituting these values B will be
2:19
now let's finalize the cutting length
2:22
calculation the ultimate calculation of
2:25
The Cutting length L for stirrup 2 is
2:27
composed of various components
2:29
L is given by twice a plus b plus Oak
2:32
length minus 90 degree Bend plus 135
2:37
substituting the values of a b the
2:40
provided hook length and bend angles L
2:46
it shall be noted that in the above
2:48
equation we have considered a length of
2:51
10 times the diameter for the hook that
2:53
stand D we have subtracted 2 times the
2:56
diameter for each of the 390 degree
2:58
bends that's 2D and 3 times the diameter
3:01
for each of the two 135 degree bends as
3:04
indicated in the drawing
3:06
thus The Cutting length of both stir up
3:08
1 and stir up 2 in this 4-legged stir up
3:14
I hope you found this video helpful if
3:17
you want to learn how the bar bending
3:19
schedule of a project is done then I am
3:21
giving you an opportunity to learn all
3:23
these things in a single combo course by
3:26
the name Advanced quantity surveying and
3:28
bar bending schedule this course covers
3:30
everything from excavation and PCC to
3:33
puttings columns beams brickwork and
3:37
each and everything will be covered both
3:39
manually and through Excel sheets plus
3:42
you will learn how to prepare the bar
3:43
meaning schedules for footings beams
3:46
columns slabs and more the link of the
3:49
course you will find in the description
3:51
box of this video thank you
