Category Archives: Masonry

How much material for Brick work ?

Hello Friends ,

Do you know how to calculate the material required for constructing 1 CuM of brick masonry ? This information is useful for :

  1. Calculating the material to be brought for the brick masonry.
  2. Doing rate analysis
  3. Making a detailed estimate 

Today we shall solve one example so that you are able to understand each step with utmost clairity.

Here we go.

1

13

2

3

4

5

6

7

12

8

9

14

Hope you are able to properly get the steps .

In case of any queries , please do write to me through this blog.

Blog Stats for future reference :

Rate analysis for Stone Masonry :

Readers,

When I was standing in a car park , waiting for someone to complete the shopping ,

I got a Whatsapp message from one of my students , asking me for the Rubble masonry rates. He said he wanted to submit the quotation on the same day. There was no use of just giving him a rate which I remember because it has to match with the material and labour rates and profit margin expected by this person.

So , I had to make a rate analysis for the Rubble masonry .

I asked him to message me the basic rates which he promptly did.

I next 15 minutes , I completed the rate analysis and send back the entire analysis to him .

Thought I shall also share the same calculations with you for your quick reference.

 

RANDOM RUBBLE MASONRY USED IN THE COMPOUND WALL . [ REAR PORTION ]
RANDOM RUBBLE MASONRY USED IN THE COMPOUND WALL .
[ REAR PORTION ]
Part A : The data :

Cement: 300/bag

Aggregate:  2400/brass

Rubble : 1500/brass

Labour  :2000/brass

Sand 5500/ brass

You already know that : I brass = 100 Cft

Desired  Profit 25%

 

Specifications :

Rubble masonry Width 18″

for wall compound ht 3′ from ground level

 in cement mortar in ratio : ( 1:6 )

 

Material for 1 cum:

Cement : 300*(0.45*1.52*28.8)/7= Rs.844

Sand:   5500*0.3529*6*(0.45*1.52)/7= Rs.1138

Rubble: 2400*0.3529*1.25 = Rs.1058

Labour : 2000*0.3529= Rs.706

 

Total:                        Rs.3756

Profit:Add@ 25%:     Rs.937

                   Total:  Rs.4693 Rs/cum.

Or             Rs.133 per Cft.

 

PCC 1:4:8

Material for 1 cum:

Cement : 300*(1.52*28.8)/13 = Rs.1010

Sand:   5500*0.3529*4*1.52/13 =Rs.908

Aggregate: 2400*0.3529*8*1.52/13  = Rs.792

 Sub total:                     Rs. 2710

For Labour Add 40%    Rs.1084

Total :                            Rs. 3794

Profits Add25%               Rs.949

Total :  Rs. 4743 per Cum

Rs.   134 per  Cft.

  

Note :

1.You shall observe that the rate for Rubble masonry in cement mortar in CM 1 :6 and the rate for plain cement concrete in proportion 1:4:8 are  almost equal

2. The material wastage is a point on which I need to elaborate.

As such when we consider the factor 1.52 in the material calculations by dry mix method, we are already considering 2 % material wastage . In case you want a higher allowance for wastage , you may take the factor as 1.57 so that material wastage is 7%.

Brick work at London 02

Well , the photograph which now you are going to see is not exactly from london.

This is  a bridge on the way to the Brighton. A coastal town on the southern coast of United Kingdom.
in my rough assessment, this bridge must be built prior to year 1900 AD.

[ Exact year of construction can be found out …but is not known right now ].

Look at the marvellous arches in the bridge which have been constructed out of the brick masonry.

There is no plastering on this brick work.

IMG_20150627_161004

Brick work at London :02

IMG_5089The exposed brick work is done with facing bricks.

these bricks are smaller in size.

have got a better surface finish ,uniform colour and texture and are quite compact.

Normal trend is to keep the external exposed surface without plaster but carry out cement plastering on all internal faces of the walls.

Here we are seeing at the Hampton court palace at London .