Jun 26, 2019

HOW TO PREPARE BAR BENDING SCHEDULE?


HOW TO PREPARE BAR BENDING SCHEDULE?

           After a lot of requests from all audiences from outside India, here we are going to explain the procedure of preparation of bar bending schedule on-site in an easy way, 

           As discussed in our previous blog a lot of fresher’s engineers and some experienced engineers are scared of making bar bending schedule, don’t know about this but they are giving a lot of reasons to keep away from preparing of bar bending schedule to himself.

A lot of Engineers has don’t have any idea about how to prepare Bar bending schedule. for those engineers don't panic, here we will learn about how to prepare bar bending schedule and its format in details, after that you will like preparation of bar bending schedule.

Without going in deep details we will start our subject which is How to prepare Bar Bending Schedule?

 Follow the following procedure to prepare the bar bending schedule efficiently.

1. Detailed Study of Drawing.

This is a very important step before starting any construction work anywhere. No, any work can start and complete without drawing. If any work will start without drawing there may be a lot of mistakes happen and not complete in the proper way.

There are the following types of drawings.
1.       Survey Drawing
2.       Layout Drawing
3.       Architecture Drawing
4.       RCC/Structural Drawing
5.       Plumbing Drawing
6.       Electrical Drawing
7.       HVAC Drawing
8.       Landscape Drawing
And many other types of drawing which depend as per project nature. But those are some important types of drawing but you don’t have all those drawing to prepare bar bending schedule. You need only 2 types of drawing from the above drawings.
1.       Architectural  Drawing
2.       RCC/Structural Drawing

In Architectural Drawing there is details were given about building or any structure like Plans, Sections with all the measurements.

In RCC/Structural Drawing Reinforcement details are given with demarcation of structures like Column is C, Footing is F, Beam is B, etc. and Specifications of Reinforcement of this Structure in Brief. In RCC/Structural Drawing there are 3 Parts and we needed to study. 
1.       Structural Layout
2.       Structural Schedule
3.       General Notes

In structural Layout, Drawing details are given of particular structure, mostly in this drawing given a demarcation of structures as discussed above. Like Footing- F1, Column- C1, Beam-B1, Slab-S1, S2, S3……… etc.
In Structural Schedule there are details of reinforcement is given in brief like
 F1- 5-16mm Dia. (Both side/Top Bottom)
C1- Main Bar- 8-16mm Dia. Stirrups- 8mm 150 C/C

That means, the brief reinforcement details are given for binding steel reinforcement of any type of structure is called a reinforcement schedule. You can easily check the table of reinforcement schedule where is given each and every item reinforcement details.

In General Notes drawings details given about typical structures used in the buildings, as well as section, are given of Footing, Column, Beam and other structures to know how reinforcement will bind and the lengths are given of stirrups, L, lap length, Covers, also mentioned the grade of concrete and other conditions and procedures to follow at the time of execution

2. Prepare a BBS Format

If you are need to prepare bear bending schedule, you understood all the thing to prepare bar bending schedule but if don’t have any idea of how to preset it in the front of client or your seniors. And how they will understand this easily. So fulfill that the entire requirement you need to prepare one good format to separate this entire thing and get the result on one page. Here We are giving a format for Sample, you can follow this or you will change this as per your requirement.
This is the list of Column for preparation of bar bending schedule.

1. Serial Number: Where you can put the serial number of your structures and you can easily count them, it is optional also. This can not affect your bar bending schedule.

2. Item Description: In this Column, you can add the Designation of your structure in Briefly like F1, F2, F3…etc.

3. Numbers: In this column, you can add/insert the same types of structure with the same designation as if Footing F1 is at 8 places shown in RCC Layout drawing then you can add 8 in this column.

4.  Length, Breadth, Depth: Everyone knows about this column you can insert the sizes of your structure which is mentioned in Item description Column in front of this.


5. Quantity: in this column, you can easily calculate the concrete Quantity of your structure by multiplication of Nos X L X B X D: you can easily get concrete quantity, which is helpful for cross-checking of steel constant which we are working here.

6. Bar Description: In this column, we can add the description of the particular bar in briefly you can also add the position of the bar like Bottom Bar, Top Bar, Side Bar, Stirrups, Etc. as per schedule drawing.

7.  The diameter of the Bar. : in this column need to insert the diameter of the bar which is mentioned in bar description as per schedule drawing.

8. Spacing/Nos: In this column, we need to insert the actual spacing of Steel reinforcement as per mentioned in schedule drawing like 12-16Y which means 12 Nos of 16mm Bar. You need to insert 16mm in the Diameter of Bar column and 12 in this column. If there is some stirrups/Link given in column like 8mm@150C/C that means 8mm steel with 150mm spacing.


9. Shape of Bar : You can add the shape of bar as per given in drawing, and give a name to each side to count the length of bar easily in next A, B, C, D, E, F, G, H, I.. column you can insert this length one by one.

10. Total Cutting length: In this column, you can add the Length of A, B, C, D, E, F, G, H, I... column which is needed to insert in this column.

11. Total Number: This column displays the total number of the bar is required in these structure/structures. You can add it by a simple formula like the Total number of Length of Footing divided by Spacing given in Drawing if there is Column you need to do Depth of Column divided by Spacing of Stirrups given in Drawing. And add one every time in it.

12. Weight of Bar: This the main Result of Our Bar Bending Schedule you can see the formula of which is so simple like Total Cutting Length of bars X Nos of Bar X Weight per meter of Bar.
You can see the photo graphs to find out formulas.  


You always need to remember the Weight of Steel per Meter as per this formula.
Weight /Meter: (Square of Diameter meter of Bar)/162
 You will get Following Answers :
1.       8mm : (8X8)/162 : 0.395
2.       10mm: (10X10)/162 : 0.617
3.       12mm : (12X12)/162 : 0.889
4.       16mm : (16X16)/162 : 1.580
5.       20mm : (20X20)/162 : 2.469
6.       25mm : (25X25)/162 : 3.858
7.       32mm : (32X32)/162 : 6.321



If you want more to know about the preparation of Bar bending schedule you need to mail us on director.cbec@gmail.com.
If you require these types of formats you can mail us, we will provide you all types of Formats.


Team
CBEC INDIA

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