How to calculated column reinforcement Numbers of Bars(BBS).


Columns:

Columns are a type of vertical member that carries all the loads of the building from the roof to the beam and then to the ground at the base.

Different columns have different sizes in different places. It depends on one of the designers. So in this case, the importance of column design is a little more.


 It is good to know some important things in the column

 1 / The design of the column should match the actual work.

 2 / Keep the spacing of the ring of the rod correct. Of course, keep in mind that the spacing of the rod is given.

 3 / Keep the lapping zone of the column right.

 4 / Keep the clear cover of the column.

 5 / Correct the bar binding of the rod.

 8 / When lapping the rod, keep in mind that all the lapping should not be in one place, then it should be alternated. Try to make sure that 30/40% of the rod lapping falls in one place.




 Rules for finding out the reinforcement of the column: -

 Hold column size (24 "X 12")

 The rods used in the column are (20 mm Dia @ 8 Nos) and (16 mm Dia @ 6 Nos)

 Stirrup or ring used (10 mm Dia 5 "C / C)

 Note: 5 "c / c strip is used to indicate that the strip of the column is usually in L / 3 of the length of the column.



 Formula for finding the main bar: -

           Column number X The length of the column is the amount of X rods

        Suppose, column number 3.

                    20 mm Dai Rod

 (1) Main Bars Of Column: 3 X10'-0 "X 8 = 240 Rft.                                 = 240/3.28

                = 73.170m3

20mm Dia @  2.466 Per m3 = 73.170*2.466                        =180.43 kg/ m3


                    16 mm Dai Rod

 (2) Main Bars Of Column: 3 X10'-0 "X 6 = 180 Rft

                                                     = 180/3.28

                                           = 54.8780m3

16mm Dia @  1.576 Per m3 = 54.8780*1.576                        = 86.48 kg/ m3


 Stirrup / ring extraction formula: -

                       10 mm Dai Rod

 (1) Numbers Of Tie Bars:

 Hight Of Column (10 "-0 '/ (5/12") = 23.80 / 24 Nos

 (2) Length Of Tie Bars:

 Number Of Stirup = 24 Nos X Around Clear Cover (- 1.5 ") X Hooks (2x3") = 6'-6 "X 24 = 156 Rft


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 āĻ•āϞাāĻŽেāϰ āĻ•িāĻ›ু āĻ—ুāϰুāϤ্āĻŦ āĻĒূāϰ্āĻŖ āĻŦিāώ⧟ āϜেāύে āϰাāĻ–া āĻ­াāϞো।āϝেāĻŽāύঃ

 ā§§/āĻ•āϞাāĻŽ āĻāϰ āĻĄিāϜাāχāύ āĻāϰ āϏাāĻĨে āĻŦাāϏ্āϤāĻŦে āĻ•াāϜেāϰ āĻŽিāϞ āĻĨাāĻ•āϤে āĻšāĻŦে।āϤাāϰ āĻŽāϧ্āϝে āĻļāĻ িāĻ• āϜা⧟āĻ—া⧟ āĻĄিāϜাāχāύ āĻ āϝে āϝে āĻĄা⧟াāϰ āϰāĻĄ āĻĻে⧟া āφāĻ›ে āϤা āĻ িāĻ• āĻĨাāĻ• āĻŦāϏাāύো।

 ā§¨/ āϰāĻĄেāϰ āϰিং āĻāϰ  āϏ্āĻĒেāϏিং āĻ িāĻ• āϰাāĻ–া।āĻ…āĻŦāĻļ্āϝāχ āĻ–ে⧟াāϞ āϰাāĻ–া āϝে āĻ–াāύে āϝে āϏ্āĻĒেāϏিং āϰāĻĄ āĻĻে⧟া āϏেāϟা āϏেāχ āϏ্āĻĒেāϏিং āϰাāĻ–া।

 ā§Š/ āĻ•āϞাāĻŽ āĻāϰ āϞ্āϝাāĻĒিং āϜোāύ āĻ িāĻ• āϰাāĻ–া।

 ā§Ē/ āĻ•āϞাāĻŽ āĻāϰ āĻ•্āϞি⧟াāϰ āĻ•āĻ­াāϰ āĻ িāĻ• āϰাāĻ–া।

 ā§Ģ/ āϰāĻĄেāϰ āĻŦাāϰ āĻŦাāχāύ্āĻĄিং āĻ িāĻ• āĻ•āϰে āĻ•āϰা।

 ā§Ŧ/ āϰ⧜েāϰ āϞ্āϝাāĻĒিং āĻĻে⧟াāϰ āϏāĻŽā§Ÿ āĻ–ে⧟াāϞ āϰাāĻ–āϤে āĻšāĻŦে āϝে āϏāĻŦ āĻ—ুāϞা āϞ্āϝাāĻĒিং āĻāĻ• āϜা⧟āĻ—া⧟ āύা āĻĒāϰে āϤা āĻ…āϞ্āϟাāϰāύেāϟ āĻ•āϰে āĻĻিāϤে āĻšāĻŦে।āϚেāώ্āϟা āĻ•āϰāϤে āĻšāĻŦে āϝেāύ ā§Šā§Ļ/ā§Ēā§Ļ % āϰāĻĄ āϞ্āϝাāĻĒিং āĻĒ⧜ে āĻāĻ• āϝা⧟āĻ—া⧟।āĻŦাāĻ•িāϟা āωāĻĒāϰ āĻāϰ āĻ…ংāĻļে āĻĒ⧜āĻŦে।


 āĻ•āϞাāĻŽেāϰ āϰিāύāĻĢোāϰ্āϏāĻŽেāύ্āϟ  āĻŦেāϰ āĻ•āϰাāϰ āύি⧟āĻŽঃ-

 āϧāϰি āĻ•āϞাāĻŽ āϟিāϰ āϏাāχāϜ (24" X 12")

 āĻ•āϞাāĻŽে āϰāĻĄ āĻŦ্āϝāĻŦāĻšাāϰ āĻ•āϰা āĻšā§ŸেāĻ›ে  (20 mm Dia @ 8 Nos)  āĻāĻŦং (16 mm Dia @ 6 Nos)

 āϏ্āϟিāϰাāĻĒ āĻŦা āϰিং āĻŦ্āϝāĻŦāĻšাāϰ āĻ•āϰা āĻšā§ŸেāĻ›ে (10 mm Dia 5" C/C)

 āĻŦিঃ āĻĻ্āϰঃ- āĻŦুāĻাāύোāϰ āϜāύ্āϝ 5 " c/c āϏ্āϟিāϰাāĻĒ āϧāϰা āĻšāĻ‡ā§ŸেāĻ›ে āϤāĻŦে āĻ•āϞাāĻŽ āĻāϰ āϏ্āϟিāϰাāĻĒ āϏাāϧাāϰāĻŖāϤ  āĻ•āϞাāĻŽেāϰ āĻĻৈāϘ্āϝেāϰ L/3 āϤে āĻšā§Ÿ।

 āĻŽেāχāύ āĻŦাāϰ āĻŦেāϰ āĻ•āϰাāϰ āĻĢāϰ্āĻŽুāϞাঃ-

    āĻ•āϞাāĻŽ āϏংāĻ–্āϝা X āĻ•āϞাāĻŽেāϰ āĻĻৈāϰ্āϘ্āϝ X āϰāĻĄেāϰ āĻĒāϰিāĻŽাāύ

        āϧāϰি, āĻ•āϞাāĻŽ āϏংāĻ–্āϝা ā§Š āϟি।

                    20 mm Dai Rod

 (1) Main Bars Of Column:  3 X10'-0"X 8 =240 Rft

                              = 240/3.2

                              = 73.170m3

20mm Dia @  2.466 Per m3 = 73.170*2.466                        =180.43 kg/ m3


                    16 mm Dai Rod

 (2) Main Bars Of Column:  3 X10'-0"X 6 =1800 Rft

                       = 180/3.28

                        = 54.8780m3

16mm Dia @  1.576 Per m3 = 54.8780*1.576                        = 86.48 kg/ m3


 āϏ্āϟিāϰাāĻĒ /āϰিং āĻŦেāϰ āĻ•āϰাāϰ āĻĢāϰ্āĻŽুāϞাঃ-

                       10 mm Dai Rod

 (1) Numbers Of Tie Bars:

 Hight Of Column( 10"-0' /( 5/12")=23.80 / 24  Nos

 (2) Length Of Tie Bars:

 Number Of Stirup =24 Nos X Around Clear Cover(- 1.5") X Hooks (2x3") = 6'-6"X 24=156 Rft


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