Learn to Prepare Bar-Bending Schedule

Published On 07/09/2022
Author : Jayshree Gupta

What Bar Bending Schedule Means (BBS)?

A Reinforcement Drawing is a reference drawing of a Structure's Bar Bending
A schedule, or "BBS" is a detailed list that specifies the location, mark, type, size,
length, and number of each rebar or fabric as well as its length and number and
bending details.
"Scheduling" is the process of outlining the location of the rebar, the kind of rebar, its
size or diameter, the quantity, and every other detail. Bar-bending scheduling is used
in the context of reinforcement bars. The Bar Bending Schedule, which provides
specific reinforcing requirements, is a method of ordering rebars for each structural

General guidelines to be followed in preparing BBS:

  1. The bars should be assembled together for each structural unit, such as a beam, column, footings, etc., according to general criteria it should be followed when preparing BBS.
  2. The bars in a building structure ought to be mentioned floor by floor.
  3. Schedules should not be included in the detailed reinforcement drawings but should be provided separately as A4 sheets for cutting and bending reasons.
  4. The bar and fabric schedule forms, as well as the shapes of the bar, should all adhere to IS 456:2000 and BS 8666.
  5. Generally, it is preferred to list bars in ascending numerical order.
  6. A specific group or set of bars with a specific length, size, shape, and type utilized at work must be specifically referred to by the bar mark reference on the label that is joined to a bundle of bars.
  7. This is crucial because a reference to a bar mark might then be mentioned to a group of bar features. Additionally, this helps steel workers and fixers in keeping track of the kind and quantity of bars required to finish a project job.

Bar bending Schedule is used by the following people:

  1. Quantity Surveyor.
  2. Detailed Estimator.
  3. A person authorized for purchase and order work.
  4. Person Analyzing the drawings.
  5. Steel Fixer on Site.
  6. Site Engineer and Clients Consultant Engineer.
A quantity surveyor is in charge of project costs and operation estimation. High
levels of precision are necessary for this kind of surveying. The quantity surveyor
can shorten the number of bars needed for each bar type using the bar bending
This leads to an estimation of the quantity of steel, which gives the requirement of the
cost needed for steel work. Therefore, the contractor who places the order for the
reinforcements also uses this schedule. And the weight of the purchased steel
determines the unit cost of steel.
To ensure that the reinforcing work on the job site is in accordance with the design
requirements as shown in the plans, the clerk of works and other inspectors consult
the BBS. The steel fixers use it as a point of reference personally. They can quickly
record the quantity and kind of rebar required for a structural unit.
In short, the Bar Bending Schedule incorporates all relevant reinforcement-related
data utilized by experts at various construction-related phases, from procurement of
material to completion of the project.

Steps to prepare BBS:

Necessary required data
  1. Bar mark reference/ Bar number
  2. Diameter of bar
  3. Shape of Bar
  4. Centre to Centre Spacing between bars
  5. Length of bar
  6. Cutting the length of the bar
  7. Number of bars