55152d16bec1e53f7f2bc1aae730e014dd00585c Bar Bending Schedule for Column - Construction, Final Account & Tender

Bar Bending Schedule for Column

Bar Bending Schedule for Column

We will take one simple example for reinforcement quantity calculations for a concrete column. so follow the detail drawing.
Example = Below image (img:01)
bar-bending-schedule-for-column
img:01 detail drawing of based pit's

Clear cover to reinforcement provided is 25 mm and fortBased Pits.
bar-bending-schedule-for-column
trench-reinforcement

bar-bending-schedule-for-column
Concrete Column Cross X-Y Section

Length of A = width of Pits - 2 x bar cover
                = 900 - (2x 25) = 850

 no. of A bar = 850/150 = 5.6 ≃ 6 = 6+1 = 7



Length of B
Bar shape of B is as shown below:
bar-bending-schedule-for-column
Bar shape of B

Length of B = length of P + length of Q ('L' joint) - (for cover+ for bar)
                    (3000+225) + 300 - (25+20)

Length of C =  x (225+225) + (2 x 100) - 8 x for cover
                      = 900 + 200 - 200 - 125
                  = 775


Stirrups

Stirrups will be required at areas of high shear, such as bearing points and below large point loads. Increasing concrete beam spans, to reduce the need for additional piers, has resulted in the need for the use of steel stirrups. Concrete beams vary in depth.  The deeper the beam, the more shear capacity.  When the depth is not adequate, steel stirrups must be added to increase the shear capacity of the beam.

Column Reinforcement

The column reinforcement bars should be stared from the Footing. The upper column reinforcement bars are cranked at the laps and connected. Special care should be taken in this to ensure the lap lengths. After erection of main reinforcements, cover blocks were attached to column reinforcements to maintain the required cover for column reinforcement. Most of Columns centers were located at intersections of grid lines.


Binding Wires (we are don't care about this)


R/f bars are jointed with using wires which is called “binding wires”. Hackers are used to bind these wires.

Bar Bending Schedule for Column:

bar-bending-schedule-for-column
Bar Bending Schedule for Column