Hello, my friends. Today I will discuss Bar Bending Schedule. We are learning about all of the bar bending schedules on this website. Guys, you're aware of the bar bending schedule. Why do people employ bar bending in construction? Don't worry if you're unaware of the bar bending schedule. I'll go into further depth below.
What is Bar Bending Schedule?
Cutting and bending: the reinforcement bar into the desired shape is referred to as the bar bending schedule. The Bar Bending Schedule, or "B.B.S.," is a comprehensive list that illustrates the region, mark, kind, size, length, and quantity of each Bar or texture in a Reinforcement Drawing of a Structure.
Bar Bending Schedule is utilized by the following:
- Detailer
- An individual inspects the drawing
- A temporary employee in charge of fortification.
- Association in charge of fortification construction
- Fixer of steel
- A works agent or another assessor
- The quantity assessor
A quantity assessor oversees a venture's assessment and costing efforts. This type of research necessitates a high level of precision. The Bar Bending Schedule urges the quantity assessor to combine each bar type's estimated number of bars.
And making its list which is following:
- The Bar's location and identification.
- The type of Bar
- Bar Dimensions
- reducing the length of the Bar
- The number of bars
- Bar bending details
- Total number
Each Bar is in a structure's reinforcing drawing. This listing procedure is known as Scheduling.
Advantages of Bar Bending Schedule.
- Cutting and bending of reinforcement are possible.
- The Bar Bending Schedule reduces steel waste and hence lowers project costs.
- To guarantee the Client's bill or to set up the bills of subcontractor labor.
- Allowing for the calculation of the reconciliation or material consumption.
- It provides a more accurate estimate of the reinforcement steel required for each construction part.
- To calculate the amount of steel required.
- The Bar Bending Schedule is extremely important during reinforcement auditing and prevents theft and pilferage.
- It allows for the quick and easy creation of building work bills for clients and contractors.
- To correctly compute the cutting length of various types of Rebars in varied places and individuals.
- 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 precisely.
- To limit the wastage.
- It will be simpler and more successful to cross-confirm and check the location Reinforcement works with B.B.S. close by.
- It will be 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, support cutting and bowing should be possible at the processing plant and moved to the site.
- Because fewer laborers are required for bar bowing, this increases site efficiency and reduces development time and expense. Bar twisting also reduces steel support waste (5 to 10%), saving the project money.
- When compared to fe415, using a bar bowing schedule for Fe500 saves 10% more steel fortification.
- It enhances quality control at the site because fortification is provided following the bar bowing timetable, which is prepared to utilize the arrangements of separate itemizing standard codes.
- It provides a better assessment of support steel prerequisite for every single primary part, which can be utilized to figure out general fortification necessity for the whole task.
- Stock administration should assist. Steel demand for the future development phase may be accurately assessed, and acquisition should be achievable. This delays the loading of new steel fortification at the site for longer, reducing support consumption if beachfront zones occur. It also prevents a lack of support for progressing work through precise assessment, allowing solid development work to continue effortlessly. Bar twisting timetable is very valuable during fortification evaluation and gives thoughts of robbery and pilferage.
- Bar twisting timetable can be utilized for support cutting, bowing, and creating the skeleton of the primary part before it very well may be put at the necessary position. Different exercises, for example, unearthing, P.C.C., 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 season of development. It gets supportive in forestalling any harm because of development time overwhelm.
- It gives benchmarks to the amount.
- And quality necessities for fortification and solid works.
- Bar twisting timetable gives the steel amount prerequisite much precisely and along these lines gives a choice to improve the plan if there should be an occurrence of cost invade.
- It is simple for site architects to check and affirm the Bar bowing and cutting length during review before an arrangement of cement with the bar twisting timetable and 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 utilizing designing recipes and standard codes, so there is no alternative for a rough assessment of steel support.
- Automation of cutting and bowing of fortification should be conceivable with the use of bar bowing timetable, thus minimizing the expense and time of undertaking and reliance on gifted labor necessary. It also improves the consistency of precision in bar cutting and twisting.
- When automated bar cutting and bowing are used, the cost of fortified solid work per unit decreases, assisting in the cost reduction of the development project.
Why is steel used as a reinforcement bar?
- Similar to concrete in terms of thermal expansion coefficient.
- Excellent strength for the cost-effective design of an R.C.C. Structure.
- Approved grip or bonding with concrete.
- Excellent corrosion resistance for increased longevity.
- The best bendability for shaping.
Size and unit weight of 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/m.
Bend Deducting & values.
Concrete Cover
In reinforced concrete constructions, the support is surrounded by sufficient concrete cover to protect the concrete from environmental conditions that cause concrete to consume.
The distance is estimated in an unusual method, including terminologies such as Clear Cover, Nominal Cover, and Effective Cover.
Transparent Cover
The distance between the bare concrete surface (without plaster or other finishes) and the nearest surface of the reinforcing Bar are defined as the transparent cover.
Nominal Cover
The word "transparent cover" has been replaced by "nominal cover." The nominal cover is the distance from the shown concrete surface to the nearest support bar (it might be any bar principle bar, longitudinal Bar, and even connections or stirrups).
The nominal cover should not be exactly the width of the Bar.
Effective cover
This word is commonly used in plan counts. The effective cover is the distance between the given concrete surfaces and the centroid of the fundamental support.
The effective cover is the distance between the R.C.C.'s peripheral pressure face and the focal point of the principal fortification territory in strain.
Value of clear cover
| 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 |
So finally, this is the Basic knowledge about the Bar Bending Schedule. This article is very helpful for Fresher civil engineers, overseers, sub-overseers, and construction engineers.