This has been narrated in Hindi so that many of you can understand the subject. This is an introduction to the topic and if you like this Webinar,then I can prepare the advanced video on AAC blocks and post it for you.
Hope by this time you must have subscribed to my You tube channel.
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.
Part A : The data :
Rubble : 1500/brass
Sand 5500/ brass
You already know that : I brass = 100 Cft
Desired Profit 25%
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
Profit:Add@ 25%: Rs.937
Total: Rs.4693 Rs/cum.
Or Rs.133 per Cft.
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.
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%.