CivilJungle

  • Home
  • Civil
    • Detail A to C >>
      • Aggregate
      • Beam
      • Bitumen
      • Brick
      • Bridge
      • Cement
      • Civil
      • Column
      • Concrete
    • Detail D to I >>
      • Dampness
      • Design
      • Difference
      • Electrical
      • Excel Sheet
      • Flooring
      • Formwork
      • Foundation
      • Irrigation
    • Detail J to R >>
      • Mortar
      • Plaster
      • Pile
      • Plumbing
      • Quantity Survey
      • Reinforcement
    • Detail S to S >>
      • Sampling
      • Self Compact Concrete
      • Slab
      • Soil Mechanics
      • Staircase
      • Stone
      • Survey
    • Detail T to Z >>
      • Technology
      • Test
      • Transportation
      • Window
      • Wood
  • Difference
    • Difference Between A to C >>
      • Difference Between 33, 43 and 53 Grade Cement
      • Difference Between Asphalt and Bitumen
      • Difference Between Beam and Column
      • Difference Between Bitumen and Tar
      • Difference Between Bridge and Culvert
      • Difference Between Carpet Area and Built-up Area
      • Difference Between CPM and PERT/PERT Vs CPM
    • Difference Between F to L >>
      • Difference Between Fat Lime and Hydraulic Lime
      • Difference Between Flexible Pavement and Rigid Pavement
      • Difference Between Flyover and Bridge
      • Difference Between Footing and Foundation
    • Difference Between L to M >>
      • Difference Between Lap Length and Development Length
      • Difference Between Lime and Cement
      • Difference Between M Sand Vs River Sand
      • Difference Between M25 and M30 Concrete
      • Difference Between Mortar and Concrete
    • Difference Between N to P >>
      • Difference Between One Way Slab and Two Way Slab
      • Difference Between OPC Vs PPC
      • Difference Between Plasticizer And Superplasticizer in Civil
      • Difference Between Plinth Level, Sill Level, and Lintel Level.
    • Difference Between P to W >>
      • Difference Between Pre-Tensioning and Post-Tensioning
      • Difference Between Short Column and Long Column
      • Difference Between Timber And Wood
  • Excel Sheet
    • How to >>
      • How to Building Construction Process Step by Step
      • How to Calculate Slab Steel Quantity from Drawing | BBS of Slab
      • How to Calculate Staircas
      • How to Excavation Calculation in Excel Sheet
      • How to Find House Construction Cost
    • Building Estimation Step by Step In Excel Sheet
    • Estimation for Building Works
    • House Construction Cost Calculator Excel Sheet
    • House Construction Cost Calculator Excel Sheet For Ground Floor(G.F.), G.F.+1, G.F.+2, G.F.+3,
  • Tools
    • Rate Analysis >>
      • Rate Analysis of Aluminum Door
      • Rate Analysis of Wooden Door
      • Rate Analysis of Brick Work
      • Rate Analysis for Concrete
      • Rate Analysis for Dry Lean Concrete
      • Rate Analysis of Plastering
    • Brick Masonry Calculator
    • Calculator for Cutting Length of Stirrups
    • Concrete Material Calculator
    • House Construction Cost Calculator
    • Plaster Calculator
    • Steel Bar Calculation
    • Trapezoidal Footing Calculato
  • IS Code
    • Is 1200 Important Point Part-1
    • IS Code for Civil Engineer [Q&a]
    • IS 456 Most Important Point Part- 1
    • IS 516:1959 Most Important Point (Method of Tests For Strength of Concrete)
  • हिंदी

Estimation for Building Works | Centre Line Method | Long and Short Wall Method

Estimation for Building Works

Important Point

  • Estimation for Building Works
    • 1. Centre Line Method
    • 2. Long and Short Wall Method
    • 3. Crossing Method 
    • Elements of Building Estimate use Centre-Line Method 
    • Elements of Building Estimate use Long and Short wall Method 
    • Long Wall Short Wall Method
    • Centre Line Method
    • What Is Centerline Method?
    • Where Centre Line Method Is Used?
    • How Do You Measure Center Line?
    • What Is Centre Line Plan?
    • What Is Centre Line Method Explain with Diagram?
    • Long Wall and Short Wall Method
    • Centre Line Formula

Estimation for Building Works

The quantities of various items such as earthwork in excavation, foundation concrete, brickwork in foundation and plinth, brickwork in the superstructure, etc. can be estimated by any of the following three methods

  1. Centre Line Method
  2. Long and Short Wall Method
  3. Crossing Method 

1. Centre Line Method

In this method of estimation, the total center line length of walls in a building is first calculated, then the center line length is multiplied with the breadth and depth of respective item to get the total quantity at a time.

Centre Line Method

Fir different sections of walls in a building, the center-line length for each type shall be worked out separately.

In the case of verandah walls or partition joining with the main wall, the center-line length shall be reduced by half of the breadth of the layer of the main wall that joins with the partition or verandah wall at the same level. A number of such pints arc simnel first to calculate the center-line length.

By this method, estimates may be prepared more quickly, and this method is as accurate as of the other methods.

Only in the case of an unsymmetrical wall, which is generally rare, no advantage may be claimed by this method over others as the center-line length varies at every layer.

But to estimate circular, hexagonal, octagonal, etc. shaped buildings, this method shall specially be adopted.

Also, read: Bar Bending Schedule Formulas As Per IS:2502-1963 | Unit Weight of Steel Bars

2. Long and Short Wall Method

In this method the longer walls in a building (generally in one direction) are considered as long walls and measured from out to out: and the shorter or partition walls, in a perpendicular direction of the long walls, are considered as short walls and arc measured from in-to-in for a particular layer of work.

Long and Short Wall or Out and in to in a method

These lengths of long and short walls arc multiplied separately by the breadth and height of the corresponding layer and are added to get the quantity.

Such lengths of long and short walls vary in every layer of footing. To calculate the lengths of long and short walls determine first their centre to centre lengths individually from the plan.

Then the length of the longwall, out-to-out may be calculated after adding half breadth of a wall at each end with its centre to centre length.

Thus the length of the short wall measured in-to-in may find out after subtraction half breadth at each end from its centre to centre length.

Length of long-wall generally decreases from earthwork to brickwork in the superstructure and in the case of a short wall, its length increases.

In some of the working examples, it may be noticed that a wall is considered as a short wall at one end and as a long wall at the other end.

Such a case arises in a wall that joins as a long wall with another long wall previously considered.

The joining end of the wall later considered as long wall is actually treated as a short end, and such a wall is named as Long-Short wall.

  • Length of Long Wall = Center to Center Length of wall + Half Breadth on One Side + Half Breadth on the Other Side
  • Length of Short Wall = Centre to Centre Length – One breadth.
  • Note: The length of the long wall usually decreases from earthwork to brickwork, and the length of the short wall is increased.

Also, read: What Is Construction Contract | Types of Engineering Contracts | Percentage-Rate Contract

3. Crossing Method 

In this method calculate the overall perimeter of the building and subtract from this four times the thickness of the wall to obtain the centre-line length.

This method is now rarely used.

Examples,

Ling wall Shot wall

Example, By Centre-Line Method 

To estimate the quantities, calculate first the total length of the center-line which remains constant for varying widths of works, and multiply this constant length of the centre-line with the respective breadth and height.

Thus quantities of all items may be calculated easily.

The total length of center-line =  2 [ (3m + (2 x ( 30 cm/2) ) + (2.5m + (2 x ( 30 cm/2) )]

The total length of center-line =  12.2 m

Elements of Building Estimate use Centre-Line Method 

Sr. No.  Description  No. Length M. Breadth M. Height M. Qty. Total Unit
1 Earthwork in excavation 1 12.2 0.7 0.75 6.405 6.405 Cu.m.
2 Lime Concrete in Foundation 1 12.2 0.7 0.15 1.281 1.281 Cu.m.
3 Brickwork in foundation and Plinth
(a)  50 cm layer 1 12.2 0.5 0.2 1.22
(b)  40 cm layer 1 12.2 0.4 1 4.88
6.1 Cu.m.

Example, By Long and Short wall Method 

Center to Center length of long walls = 3 + (2 x 0.115) = 3.3  m

Center to Center length of long walls = 2.5 + (2 x 0.115) = 2.80 m

The length of long walls out-to-out and short walls in-to-in vary in every laver of footing.

To calculate the length of long walls add a half breadth of that layer at each end with the centre to centre length and for short walls subtract half breadth of the layer from each end.

Lengths thus obtained may also be verified from the plan as shown in the above fig.

Elements of Building Estimate use Long and Short wall Method 

Sr. No.  Description  No. Length M. Breadth M. Height M. Qty. Total Unit
1 Earthwork in excavation 
Long Wall 2  4.00 0.700 0.750 4.200
Short Wall 2 2.10 0.700 0.750 2.205
6.405 Cu.m.
2 Lime Concrete in Foundation
Long Wall 2  4.00 0.700 0.150 0.840
Short Wall 2 2.10 0.700 0.150 0.441
1.281 Cu.m.
3 Brickwork in foundation and plinth 
Long Wall
1st footing 50 cm 2  3.80 0.500 0.200 0.760
2nd footing 40 cm 2  3.70 0.400 1.000 2.960
Short Wall
1st footing 50 cm 2  2.30 0.500 0.200 0.460
2nd footing 40 cm 2  2.40 0.400 1.000 1.920
6.1 Cu.m.

Short Note

Long Wall Short Wall Method

The long wall short wall method is the simple method to estimate the quantity of different work items. The internal length of short or cross, or partition walls generally runs in the transverse direction. By multiplying this length with the width and height of the wall, you can calculate the quantities.

Centre Line Method

In centre line method, total centre line length of all the walls is first measured, provided walls are of same type, long and short having same cross section and same type of footings. After the calculation of centre line length, it is multiplied with the breadth and depth correspondingly to find the total quantity.

What Is Centerline Method?

In this method of estimation, the total centerline length of walls in a building is first calculated, then the centerline length is multiplied with the breadth and depth of the respective items to get the total quantity at a time.

Where Centre Line Method Is Used?

The centreline method is suitable for walls of similar cross-sections. Here the total centerline length is multiplied by breadth and depth of respective item to get the total quantity at a time.

How Do You Measure Center Line?

The centre line is half way between the external girth and the internal girth.

What Is Centre Line Plan?

Centre line divides the plan into two equal parts. This can be marked in the field with the help of baseline. This line is very necessary and useful for layout. This line should be transferred to Burjis and be kept up to the completion of foundation work.

What Is Centre Line Method Explain with Diagram?

In centre line method, total centre line length of all the walls is first measured, provided walls are of same type, long and short having same cross section and same type of footings. After the calculation of centre line length, it is multiplied with the breadth and depth correspondingly to find the total quantity.

Long Wall and Short Wall Method

  1. Length of Long Wall = Center to Center Length of wall + Half Breadth on One Side + Half Breadth on the Other Side.
  2. Length of Short Wall = Centre to Centre Length – One breadth.

Centre Line Formula

Total center line length = 2 x (5.3+5.3) + 3 x 4.3 = 34.1 m. Quantity of plinth beam = Total Centre line length x Breadth of the beam x Depth of beam. Quantity of wall plaster for 2 sides = Total center line length x Height of wall x Thickness of plaster.

Like this post? Share it with your friends!

Suggested Read –

  • IS 456 Most Important Point Part- 1
  • Difference Between CPM and PERT | What Is CPM & PERT
  • Difference Between One Way Slab and Two Way Slab | What is Slab
  • What Is FSI | What Is FAR | What Is Premium FSI | FSI Full-Form | FAR Full Form
  • What Is Plaster | Plaster Ratio | History of Plastering | Requirements of Good Plaster
  • What Is Floating Slab| Floating Slab Construction | How to Build a Floating Slab | Advantages & Disadvantages Floating Slabs
  • What Is Structural Settlement | Causes For Structural Settlement | What Is Soil Settlement & Foundation Structural Settlement

By Krunal Rajput

About Krunal Rajput

Hey, I am Krunal Rajput. The Man Behind CivilJungle. I started this site to spread knowledge about Civil Engineering. I am a Degree Holder in Civil Engineering.

You can find him on Facebook, Twitter, Tumblr, Instagram and Google News.

Comments

  1. Tshering Tobgyel says

    3rd September 2020 at 9:01 pm

    i am happy about it. I am cleared now.

    Reply
    • Krunal Rajput says

      3rd September 2020 at 10:21 pm

      Thanks, Dear

      Reply
  2. Sandhya Rajput says

    16th November 2020 at 8:19 am

    centre line method of estimation

    Reply
    • Krunal Rajput says

      16th November 2020 at 8:21 am

      In this method of estimation, the total center line length of walls in a building is first calculated, then the center line length is multiplied with the breadth and depth of respective item to get the total quantity at a time.
      By using this method estimation can be finished more quickly.

      Reply
  3. MUHAMMAD SHOAIB KHAN AZIZI AL AMEERI says

    31st December 2020 at 8:58 am

    i am from Pakistan….i like your work
    there are so many things which make civil engineering so easy and perfect…now my request is that please use of all survey instruments like TS/THEODOLITE/AUTOLEVEL/GPS and etc.
    THANKS FOR DO ALL THESE THING TO MAKE EASY CIVIL ENGINEERING

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Write for Us and Earn Money

WRITE For US

Popular Post

What Does Parapet Mean | Types of Parapet Wall | Uses of Parapet Wall
What Is a Flight of Stairs | Types of Stairs | How Many Stairs in a Flight | Some Facts About Stairwells
Cinder Block Vs Concrete Block | What Is Cinder Blocks | What Is Concrete Blocks
What Is Shoring In Construction | Type of Shoring
Floating Slab Vs Monolithic Slab | What Is Monolithic Slab | What Is Floating Slab
H-Beam vs I-Beam | What Is H-Beam | What Is I-Beam

MIND BEHIND CIVILJUNGLE

Hey, I am Krunal Rajput. The Man Behind CivilJungle. I started this site to spread knowledge about Civil/Mechanical/Electrical Engineering. I am a Degree Holder in Civil Engineering.

You can find him on Facebook, Twitter, Tumblr, Instagram and Google News.

ADVERTISE

At CivilJungle, we clarify civil engineering and publish all the happenings & news of civil engineering.

Get Traffic & Exposure. We help brands optimize their online presence & performance.

MORE DETAIL

CONNECT WITH US


Privacy Policy | Contact Us | Cookie Policy | Sitemap | Sitemap for Hindi

............................... .............................. .............................

© Copyright 2019-2022 CivilJungle.com | The Content May Not Be Reproduced On Other Websites | Website Maintained By CivilJungle