Brick and Plastering

Estimating of unit rate for brick work

Name : Farooq Mustafa Al-Obaidi ID: I12001919

Brickwork is masonry produced by a bricklayer, using bricks and mortar. Typically, rows of bricks called courses are laid on top of one another to build up a structure such as a brick wall.

Brick work


Materials and method of brick order cost

Labor cost

Other costs

Number of costs to consider for Brick work


Bricks◦ 1. Calculate net surface area of the wall

◦ 2. calculate surface area of 1 brick including mortar

◦ 3. divide wall area by brick area

◦ 4. multiply by number of wythes in wall

◦ 5. add an amount for waste

Estimating Quantity


Mortar◦ Volume per brick =(t)(W)(L+H+t)

◦ t = mortar thickness◦ W = brick width/depth inches◦ L = length of brick inches◦ H = height of brick inches

◦ Add 25% waste

◦ For double wall must add in for mortar in space

Estimating Quantity


Type Nominal Size (in) Actual Size (in) No. per Square Foot

Standard 4 x 2 2?3 x 8 3 5/8 x 2 1/4 x 8 6.3

Modular 4 x 2 2/3 x 8 3 5/8 x 2 1/4 x 7 5/8 6.9

King 3 3/8 x 3 x 10 3 x 2 5/8 x 9 5/8 4.8

Queen 2 3/4 x 3 x 10 3 1/8 x 2 3/4 x 9 5/8 4.6

Engineer 4 x 3 1/5 x 8 3 5/8 x 2 13/16 x 7 5/8 5.7

Economy 4 x 4 x 8 3 5/8 x 3 5/8 x 7 5/8 4.5

Utility 4 x 4 x 12 3 5/8 x 3 5/8 x 11 1/2 3.1

Jumbo 4 x 3 x 8 3 5/8 x 2 3/4 x 8 5.5

Norman 4 x 2 2/3 x 12 3 5/8 x 2 1/4 x 11 5/8 4.6

Jumbo Norman 4 x 3 x 12 3 5/8 x 2 3/4 x 11 5/8

Norwegian 3 1/2 x 3 x 12 3 1/2 x 2 3/4 x 11 5/8 3.9

Brick Size


Common Bricks ( 3 holes )

Dimensions: 215 x 96 x 70 mm

Compressive Strength: > 25mN/m²

Water Absorption: < 13.7%

Per Pallet:500 pieces

Common Bricks ( full )

Dimensions: 215 x 96 x 70 mm

Compressive strength: > 25mN/m²

Water absorption: < 13.5%

Thermal Conductivity: 1.04W/m K

Per Pallet:500 pieces

Name : Loh Ming Chong ID : I13002638

Common bricks - 2 1/4 x 8 x 3 3/4 inches:

Mortar Required for Common Bricks

Joint Thickness(inches)

Mortar Required (ft3)

per 1000 bricks per ft3 brick

1/4 9 0.2

3/8 14 0.3

1/2 20 0.4


Mortar Grade Cement : Sand 1 : 3 Cement : Lime : Sand Masonry

Cement : SandCement : Sand &

Plasticizer

Typical Compressive Strength, N/mm2

7 days8 days

1 - 1 : 1/4 : 3 - - 11.016.0

2 - 1 : 1/2 : 4½ 1 : 3 1 : 4 5.58.0

3 - 1 : 1 : 5~6 1 : 4½ 1 : 5~6 2.54.0

4 - 1 : 2 : 8~9 1 : 6 1 : 7~8 1.01.5

5 - 1 : 3 : 10~13 1 : 7 1 : 8 --

Note 1: "Lime" refers to non-hydraulic or semi-hydraulic lime

Note 2: Mixes are measured by ratio in volume

Types of MortarName : Loh Ming Chong ID : I13002638

Brick Bond Laying Patterns


Mortar Joints


Labor Cost


Example


Estimating of Unit Rate of Plastering

Plaster is a building material used for coating walls and ceilings. Plaster is manufactured as a dry powder and is mixed with water to form a paste when used. The reaction with water liberates heat through crystallization and the hydrated plaster then hardens. Plaster can be relatively easily worked with metal tools or even sandpaper. These characteristics make plaster suitable for a finishing, rather than a load-bearing material.

The term plaster can refer to gypsum plaster (also known as plaster of Paris), lime plaster, or cement plaster.

What is Plastering?

Name : Johnson Mwanri ID: I12000392

Plastering


Preparing Unit rate for Plastering will require: Cost of various material which will be used during Plastering

e.g. Portland Cement, Sand, Addictive's and Form works (Scaffolding).

Cost of Transportation of Material Costing of Labours which include Skilled (Tradesman's) and

non Skilled Plant Cost e.g. Concrete Mixer Overhead and Profit

How to Estimate the Unit Rate of Plastering


Summary of Labour Estimation: Hourly Unit

Total Hour of Tradesman = Total Area of Plastering (m2) x hours rate (e.g 0.2)

Total Cost of Tradesman (Skilled Labour) = Total Hour of Tradesman x Rate per Hour

Add 15% to the Total Cost as Profit


Summary of Labour Estimation: Days Unit

For 1m3, it will take 0.27days for the Tradesman to finish it

Total Day of Tradesman = Total Volume of Plastering (m3) x 0.27

Total Cost of Tradesman (Skilled Labour) = Total Days of Tradesman x Rate per Day


Name : Sunia Baravilala ID: I13004082

Summary of Labour Estimation: Days Unit

For 1m3, it will take 0.26days for the Unskilled Labour for carrying of cement, sand and water.

Total Days of Unskilled Labours = Total Volume of Plastering (m3) x 0.26

Total Cost of Unskilled Labours = Total Days of Unskilled Labours x Rate per Day



Material Estimate Summary: With reference to the Drawing, the amount of Portland cement and Sand can

be calculated with reference to it thickness needed.

Since there is a lot of in accuracy in estimating of volume of plastering, we consider factors such as • Wastage• Non uniform of thickness So we add Add 40% to the Total material Cost to cover these factors



Plant Estimate Summary : For 1m3, it will take 0.27days for the mechanical mixture to

produce.

Total Days of Mechanical Concrete Mixture = Total m3 of concrete x 0.27

Cost of Mechanical Concrete Machine = Total Days of Mechanical Concrete Mixture x Rate



Transportation and Formworks Estimate Summary :

Mostly it transported by Hoist Trucks they paid in Daily rates

Total Trip of Truck = Total Weight of Material (kg or tonnes )/ The maximum weight the Truck can carry (kg or tonnes)

Total Days = Total trip of Trucks x total hours for trip(e.g 0.2 days)

Cost of Trucks = Total Days x Rate of truck



Transportation and Formworks Estimate Summary :

• Mostly Scaffolding are used for formwork of Plastering and they paid in Daily rates

Cost of Scaffolding = Total Days x Rate of Scaffolding per Day



To Built Unit Rates for Plastering

Unit Rates of Plastering = Total Cost of Material + Total Cost of Plant + Total Cost of Labours + Total Cost of Transportation and Formworks / The Total Area of Plastering

Note : That 15% profit is already added to individual items


Malaysian Plastering Unit Rate:


Brick and Plastering

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