Table of Contents
Introduction
A bar bending schedule for footing is a specific type of schedule that is used to detail the reinforcement bars that will be used in the footings of a building or structure.
Description
The purpose of a bar bending schedule for footing is to ensure that the footings of a building or structure are reinforced with the correct amount and type of reinforcement bars. This is important because the footings are responsible for supporting the weight of the entire structure and must be strong enough to withstand the loads that will be placed on them. A bar bending schedule also ensures that the reinforcement bars are placed in the correct location within the footings, which helps to distribute the loads evenly and prevent failure.
Formulas
The following formulas are commonly used in bar bending schedules for footings:
- Area of reinforcement = (Length of bar x Diameter of bar)/100
- Total area of reinforcement = Total number of bars x Area of reinforcement
- Number of bars = Total area of reinforcement / Area of reinforcement per bar
Calculations
Let’s consider a footing of size 1m x 1m x 0.1m, with a reinforcement steel of grade Fe 500 and dia of 20mm
- Area of reinforcement = (20 x 20)/100 = 0.04 sq.m
- Total area of reinforcement = 1 x 1 x 0.1 x 2/100 = 0.002 sq.m ( considering 2% reinforcement)
- Number of bars = 0.002/0.04 = 5 ( number of 20mm dia steel bars)
Sum Up
A bar bending schedule for footing is an important document that is used to ensure that the footings of a building or structure are reinforced with the correct amount and type of reinforcement bars. It helps to distribute the loads evenly and prevent failure.
The formulas and calculations provided in this article are a basic guide for creating a bar bending schedule for footing. It is important to consult with a structural engineer when creating a bar bending schedule to ensure that it meets the specific requirements of your project.
FAQS
What is a bar bending schedule?
A detailed list of reinforcing steel bars used in a construction project.
How is steel bar calculated for a footing?
By determining the load and size of the footing and the strength of the steel.
How is bar bending scheduled for a slab?
By determining the layout and reinforcing requirements of the slab.
How is bend length calculated?
By determining the required bend shape and size and measuring it.
How is rebar bend calculated?
By determining the required bend shape and size and measuring it.
What is the maximum rebar bend allowed?
It depends on the specific project and design requirements.
How do you calculate a 90 degree bend?
By measuring the length and angle of the bend.
What is the formula of bending strength?
It depends on the material properties and geometries of the bar and the load it is under.
What is the K factor in bending?
The ratio of the neutral axis to the material thickness.
What is a good K-factor?
It depends on the specific project and design requirements.