Quantity Survey & Estimation – Lecture # 2

Table of Content

- - Brick Types based on Sizes
  - Example #1 Brick Wall with Foundation – its quantity survey and its estimation
  - Introduction to Individual Wall Method
  - Example # 2; Individual Wall Method applied on Standard Modular Brick
  - Preparation of Estimate in Excel Sheet
  - Discussion on Assignment#1

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Quantity Survey & Estimation – Lecture # 2 – PDF

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Quantity Survey & Estimation – Lecture # 2 – Excerpt

Quantity Survey & Estimation

Course Instructor

Engr. Shad Muhammad

Lecturer, Department of Civil Engineering

Qurtuba University of Science & IT, D. I. Khan.

Review of Lecture # 1

Introduction to Quantity-Survey & Estimation

Metric System of Units & how it is simplifying calculations

Different components of Buildings

Method of Detailed Estimate

Main Items of Work

Deductions in Masonry Construction

Types & Details of Bricks

Content of Lecture # 2

Brick Types based on Sizes

Example #1 Brick Wall with Foundation – its quantity survey and its estimation

Introduction to Individual Wall Method

Example # 2; Individual Wall Method applied on Standard Modular Brick

Preparation of Estimate in Excel Sheet

Discussion on Assignment#1

Brick Sizes

Method of Building Estimate

From the study of drawings, the building is to be imagined & pictured in mind & the dimensions are to be taken out correctly.

Precaution:

Junctions of wall at the corners and at the meeting points of walls require special attention.

Example # 2 (Wall with Standard Modular Bricks):

Prepare a detailed estimate of part of a wall of a building from the given plan, section & general specifications. (Fig.1)

General Specifications:

1.Foundation concrete shall be of lime concrete

2.Foundation & plinth shall be of 1st class brickwork in lime mortar.

3.D.P.C – 2.5 cm cement concrete [c.c] (1:1.5:3) with water proofing compound.

4.Superstructure – 1st Class brickwork in lime mortar.

5.Wall Finishing – Inside wall 12 mm cement plastered (1:6) & white washed 3 coats.

Outside wall 12 mm cement plastered, 1:6 including 10 cm below ground level & finished with 2 coats of color wash over 1 coat of white washing.

Example # 2 (Wall with Standard Modular Bricks):

(Fig.1)

Example # 2 (Wall with Standard Modular Bricks):

Details of Measurement Form (Link to Excel Sheet)

Example # 2 (Wall with Standard Modular Bricks):

Method-1: Separate or Individual Wall Method

This method is simple, accurate & there is no chance of mistake. This method may be named as Long wall & Short Wall Method or General Method.

1.The method is to take the long walls & short or cross walls separately & to find out the center to center length of long walls & short walls from the plan.

2.For long walls, add the center to center length one breadth of wall, which gives the length of the wall out-to-out, multiply this length by the breadth & height to get the quantities (m3).

For finding the quantities of earthwork in excavation, for length of the trench out-to-out add to the center length one breadth of foundation.

Adopt the same process for foundation concrete, and for each footing.

It should be noted that each footing is to be taken separately & the breadth of a particular footing is to be added to the center length.

Method-1: Separate or Individual Wall Method

Summary:

In case of long wall, add one breadth & in case of short wall subtract one breadth from the center length to get the corresponding lengths.

By taking dimensions in this way, the long walls are gradually decreasing in length from foundation to superstructure, while short walls are increasing in length.

Walls which is taken first is to be treated as long wall, thought its length may be lesser, & the other wall is treated as short wall.

Method-1: Separate or Individual Wall Method

Example#4(a):

Estimate the quantities of the following items of a 2-roomed building from the given plan & section (Fig.2)

1.Earthwork in excavation in foundation

2.Lime concrete in foundation

3.1st Class Brickwork in cement mortar 1:6 in foundation & plinth

4.2.5 cm c.c damp proof course

5.1st class Brickwork in lime mortar in superstructure

Method-1: Separate or Individual Wall Method

Other Details:

Method-1: Separate or Individual Wall Method

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