Hello, friends, today I will talk about the Bar Bending Schedule. On this page, we are getting knowledge about all of the bar-bending schedules. Guys, you know what is the bending schedule.
Why use bar bending in construction? Donāt worry if you donāt know about the bar-bending schedule. I will discuss this in detail.
What is a Bar Bending Schedule?
Bar-bending schedule is the process of cutting and bending reinforcement bars into the required shape. Bar Bending Schedule, normally referred to as “BBS,” is a far-reaching list that depicts the area, mark, type, size, length, and number, and bowing subtleties of each bar or texture in a Reinforcement Drawing of a Structure.
Bar Bending Schedule is utilized by the:
Detailer
Individuals checking the drawing
A temporary worker who arranges the fortification
The association is liable for creating the fortification
Steel fixer
Agent of works or another assessor
The amount assessor
The amount assessor is liable for the assessment and costing activities of a venture. This sort of study requires a significant level of accuracy. The Bar Bending Schedule encourages the amount assessor to merge the number of bars expected for each bar type.
And making its list the following
Location and marking of the bar.
Type of bar
Size of bar
Cutting the length of the bar
Number of bars
Bending details of the bar
Total Quantity
Of each bar in a reinforcement drawing of a structure. This process of listing is called Scheduling.
Advantages of Bar Bending Schedule
| Cutting length and Bending of reinforcement can be done. Bar Bending Schedule avoids wastage of steel and thus saves the project cost. To guarantee the Bill from the Client or to set up the bills of sub-temporary workers. Accommodating to compute the Reconciliation or material utilization. It provides a better Estimation of Reinforcement steel requirements for every structure member. To estimate the necessary steel amount. Bar Bending Schedule is very useful during auditing of reinforcement and provides a check or Theft and Pilferage It enables easy and fast preparation of Bills of construction work for clients and contractors. To compute the cutting length of various kinds of Rebars in various areas and for various individuals precisely. To compute the no of Stirrups/Rings/Tie/snares alongside cutting the length of bars for various underlying individuals. To give direction to the bar-bowing laborers and team in a precise manner. To limit the wastage. It will be simpler and more successful to cross-check and confirm the location Reinforcement works with BBS close by. It will end up being a decent record in the future whenever kept up appropriately for each work. We can distinguish the wastages or work done in overabundance amount if any issue emerges with compromise. |
Advantages of Bar Bending Schedule in Details
When the bar-bowing timetable is free, cutting and bowing of support should be possible at the processing plant and moved to the site.
This increases quicker execution at the site and diminishes development time and cost because of fewer laborers for bar bowing. Bar twisting likewise evades the wastage of steel support (5 to 10%) and accordingly saves project costs.
Utilizing the bar bowing timetable when utilized for Fe500 saves 10% more steel fortification compared with Fe415.
It improves the quality control at the site as a fortification is given according to the bar-bowing timetable, which is readied utilizing the arrangements of separate itemizing standard codes.
It provides a better assessment of support steel, a prerequisite for every single primary part, which can be utilized to determine the general fortification necessity for the whole task.
Stock administration should support. The steel necessity for the next period of development can be assessed with precision and the obtainment should be possible.
This forestalls the loading of additional steel fortification at the site for a longer time, forestalling the consumption of support if there should arise an occurrence of beachfront zones.
It additionally forestalls a lack of support for progressing work by exact assessment and subsequently, solid development works can continue easily.
Bar twisting timetable is a lot of value during the review of fortification and gives minds to robbery and pilferage.
Bar twisting timetable can be utilized for support cutting, bending, and creating the skeleton of the primary part before it can be put in the necessary position. Different exercises, for example, unearthing, PCC, and so on, can continue corresponding with this movement. Thus, by and large, the task movement of the executives turns out to be simple and decreases the time of development. It gets supportive in forestalling any harm because of development time overload.
It gives benchmarks to the amount and quality necessities for fortification and solid works.
Bar twisting timetable gives the steel amount requirement with much precision and, along these lines, gives a choice to improve the plan if there is a cost overrun.
It turns out to be simple for site architects to check and confirm the bar bowing and cutting length during review before a concrete pour with the utilization of a bar twisting timetable, which helps in better quality control.
It empowers simple and quick arrangement of bills of development works for customers and contract-based workers.
The amount of fortification to be utilized is determined using design recipes and standard codes, so there is no alternative for a rough assessment of steel support.
With the utilization of a bar bowing timetable, automation of cutting and bowing of fortification should be possible, again decreasing the cost and time of undertaking and reliance on skilled labor. It likewise improves the unwavering quality of the precision of bar cutting and twisting.
When motorized bar cutting and bowing are utilized, the cost of fortified solid work per unit decreases and helps in the cost reduction of the development project.
Why is steel used as a reinforcement bar?
Coefficient of thermal expansion characteristics similar to concrete.
Good strength for the economic design of R.C.C. structure.
Better gripping or good bonding with concrete.
Nice resistance against corrosion for higher durability.
The best bendability for providing shape.Size and unit weight of the Bar
| Dia. of Bar | Unit weight of Bar (D2/162) kg/m |
|---|---|
| 8 mm | 0.395 |
| 10 mm | 0.617 |
| 12 mm | 0.889 |
| 16 mm | 1.580 |
| 20 mm | 2.470 |
| 22 mm | 2.987 |
| 25 mm | 3.858 |
| 32 mm | 6.320 |
Example 8 mm bar
(8*8)/162=0.395 kg/mBar Deducting & Value
Cover
Concrete Cover:
In strengthened concrete structures, the support is encircled by adequate concrete cover to shield the concrete from environmental conditions that cause the concrete to deteriorate.
The distance is estimated unexpectedly, and these have various terms like Clear Cover, Nominal Cover, and Effective Cover.
Clear Cover:
The clear cover is the distance between the exposed concrete surface (without plaster and other finishes) and the nearest surface of the reinforcing bar.
Nominal Cover:
The term clear cover is supplanted by the term Nominal cover. The nominal cover is the distance between the presented concrete surface and the closest support bar (it very well might be any bar, principal bar, longitudinal bar, or even connections or stirrups).
The nominal cover ought not to be exactly the breadth of the bar.
Effective cover:
This term is generally utilized in plan counts. The effective cover is the distance between the presented concrete surfaces and the centroid of the fundamental support.
The effective cover is the distance between the peripheral pressure face of RCC to the focal point of the territory of primary fortification in strain.
| COMPONENT | CLEAR COVER LENGTH |
|---|---|
| Footing | 50 mm |
| Column | 40 mm |
| Beam | 25 mm |
| Slab | 20 mm |
| Staircase | 15 mm |
| Pile | 60 mm |
| Pile Cap | 60 mm |
Majorly, in the Bar Bending Schedule, the size of the rebar, cutting length of rebar, development length, bending length, angle, and cover are very important so that we have proper information about them. If we have proper knowledge of BBS, it also helps to reduce construction costs. I hope this is very informative to all the readers. Please share this with others.
