Table of Contents
What is bending schedule in civil engineering?
A bar bending schedule is a document showing the list of structural members, bar mark, type of reinforcement, size of rebar, number of rebars for each member, cutting length, total length, shape, and location/spacing/position of all reinforcements in the working drawing.
How do you write a bar bending schedule?
Bar Bending Schedule for Reinforced Concrete Beam
- Length of B1 = clear distance between walls + 2 x width of walls – 2 x bar cover + 2 x bend length.
- Length of bar B2: A + B + C = 4000 + 2 x 230 – 2 x 40 + (1.414xH – H)
- B2 = 4000 + 2 x 230 – 2 x 40 + (1.414×334 – 334) = 4518.3 = 4520mm.
What is bar bending?
Bar bending is the manufacture and bending of the steel reinforcing bars and beams, also known as rebar, used as reinforcement in concrete construction. This gives the manufacturers the proper bends and tensile strengths of the steel required to make certain shapes or other concrete constructions that are required.
Why is bar bending done?
The Bar bending is a process of cutting and bending reinforcement steel bar into Desire shape as per structural drawing was given by structural engineer for various structural elements like footing, column, beam, slab, etc. It helps the engineer to check the reinforcement work done by the contractor.
What is a bending schedule?
Bar bending schedule or schedule of bars is a tabular representation of reinforcement bar. It is generally represented for each type of R.C.C work. Bar bending schedule generally describes the particulars of bars, shape of bending with sketches and total length and weight of the bars along with their numbers.
How is bar bending calculated?
of Bars used), Cutting length, Type of Bend and Shape of the bar in reinforcement drawings….
| Bar Bending Member | Percentage |
|---|---|
| Slab | 1\% of total volume of concrete |
| Beam | 2\% of of total volume of concrete |
| Column | 2.5\% of total volume of concrete |
| Footings | 0.8\% of total volume of concrete |
How is bar bending schedule calculated for slab?
Steps to calculate the Reinforcement required for Slab:-
- Deduct the cover for finding length of bar.
- Evaluate the length of the distribution bar.
- Calculate the Value of ‘D’ (Depth of slab- Top cover- Bottom cover)
- Find out the No. of Bars.
- Compute the Total wt of steel required for slab reinforcement.
What is bar scheduling?
What is bend length?
When we bend a steel bar, the length of the bar slightly increased due to stretching in the bending area (refer to below image). The expansion of length depends on the grade of steel and the degree of bend. The length increases with the increase of bending degree and decreases with the higher grade steel. (
What is bar bending schedule (BBS)?
Bar Bending Schedule (BBS) is basically the representation of bend shapes and cut length of bars as per structure drawings. BBS is prepared from construction drawings. For each member separate BBS is prepared because bars are bended in various shapes depending on the shape of member.
What is overlap length in reinforcement (bar bending schedule)?
Overlap Length / Lap Length in Reinforcement (Bar Bending Schedule) :- Suppose the length of building is 20 m. The standard length of Rebar is 12m. We have to join two Re-bars for the total length of building. In order to Join the two bars (overlap). Overlap length is adopted.
Who is responsible for preparing the bar bending schedule of a building?
If consultant is preparing the bar bending schedule then It is structural engineer responsibility to check the bar bending schedule that whether it comply with his design or not before submitting. Tolerance for cutting and bending dimensions should be taken into account while preparing bar bending schedule.
What software do you use to create a bending schedule?
Bar bending schedule Software 1 Microsoft Excel Spread sheet 2 RebarCAD 3 RGS REBAR 4 BAR-BE-QUE (BBS & Quantity Estimation of reinforcement steel) 5 MultiREBAR 6 Autodesk Products (e.g AutoCad Structural Detailing, Autodesk Revit, Autorebar for AutoCad etc)