Specifications for RCC Construction | Building Estimating and Costing



In my earlier articles, I have discussed types of specifications and various purposes for which specifications are to be given. Most of the constructions of various types of buildings are RCC constructions. In this article, we are going to discuss in detail about the specifications that are to be necessarily given for carrying out RCC (reinforced Cement Concrete) constructions.

RCC specifications
RCC specifications

RCC Specifications

  • Shuttering shall be done using seasoned wooden boards of thickness not less than 30mm.
  • Surface contact with concrete shall be free from adhering grout, nails, splits and other defects.
  • All the joints are perfectly closed and lined up.
  • The shuttering and framing is sufficiently braced.
  • Nowadays timber shuttering is replaced by steel plates.
  • All the props of approved sizes are supported on double wedges and when taken out, these wedges are eased and not knocked out.
  • All the framework is removed after 21 days of curing without any shocks or vibrations.
  • All reinforcement bars conform IS specifications and are free from rust, grease oil etc.
  • The steel grills are perfectly as per detailed specifications.
  • The covers to concrete are perfectly maintained as per code.
  • Bars of diameter beyond 25mm diameter are bent when red hot.
  • The materials proportion should be as per the specifications of the concrete.

Number of Cement bags required for a specific cement concrete ratios

  • For cement concrete of ratio 1:1:2(1 cement:1sand/coarse sand:2graded stone aggregate) require 11no bags of 50kg.
  • For cement concrete of ratio 1:1.5:3 require 7.8no bags of 50kg.
  • For cement concrete of ratio 1:2:4 require 6 no bags of 50kg.
  • For cement concrete of ratio 1:3:6 require 4.25no bags of 50kg.
  • For cement concrete of ratio 1:4:8 require 3.2 no bags of 50kg.
  • For cement concrete of ratio 1:5:10 require 2.50 no bags of 50kg.
  • For cement concrete of ratio 1:6:12 require 2.25 no bags of 50kg.


71 thoughts on “Specifications for RCC Construction | Building Estimating and Costing”

  1. I need to find out per sqft cost of monolithic construction including the quantity of material included and labour details.

    Reply
  2. Interest to join the group. I’m a junior estimator. And l what to ask questions in a in building especially in calculatation work. Thanks

    Reply
  3. sir
    i want to construct a building 35 yards (315 square feet )g+2,please tell me how much is the requirement of steel ,cement & sand . steel 8,10,12mm where i have to used columns ,beam slab.

    thanking you

    Reply
  4. I have single floor house 900sqft.i want build 2nd floor.but my construction build in 6’x15′ inch column size.no columns are 12. it is posible to take a load of 2nd floor ? of this column size 6×15.

    Reply
    • Unfortunately it will not take the load. Your house has been very poorly designed. Which engineer did you consult for such a disastrous design? if you go for another storey, your house will certainly collapse.

      Reply
  5. After demarcation of construction site how the positioning of central coordinate(0,0,0) is done as per grid plan so that proper laying out of column and other points of column are determined.pls help me by giving detail explanation in the mentioned email id.Thank u hope i will be clarified as like others do.

    Reply
  6. can one do away with the extra top and bottom bars in rcc beams leaving only the 4 main bars (16mm dia. 2 @ top, 2 @ bottom, no extra bars, 3meters supported length, supporting a 4″ slab on steel decking)? what could happen? sitll safe?

    Reply
  7. please do answer these questions.
    1. What is max shear stress in concrete?
    2. What is the minimum and maximum cement content for RCC?
    3. What is cube strength and cylinder strength?
    4. Why we need torsional reinforcement in two way slab?
    5. What is meant by ductile detailing?
    6. What is high strength concrete?
    7. What is tensile strength of concrete?
    8. What is modulus of elasticity of concrete?
    9. What is the nominal concrete cover for mild/moderate and severe exposure?
    10. What is the formula for maximum shear reinforcement in beams?
    11. Min and max steel in slabs and beams and columns
    12. Expansion joints spacing?
    13. Slenderness ratio in columns
    14. Max spacing of steel in slabs, min and max dia
    15. Why distribution steel is provided?
    16. What is uniaxial, biaxial bending in columns
    17. Minimum concrete strength for various components of a building
    18. Minimum width of columns as per IS 13920
    19. Densities of concrete, bricks, hollow block, steel, etc.,
    20. Define over reinforced, under reinforced and balanced section and what is preferred in failure situatiions

    thank you!

    Reply
  8. Hello.. i want recent estimation cost for following this ;
    excavation cost Per cu.m
    construction cost Per cu.m
    Plastering per sq.m

    Reply
  9. I just want to know some thing about estimation. I want to construct a rcc slab from main road to my house. It will be sloped. It’s length is 41ft and width is 7ft. So, how I estimate. That means what amount of steel, sand and stone or brick chips do I required. Slab thickness is 4 inch.

    Reply
  10. i want to know the steps of detailed estimation of rcc column of size 9″x1’6″with trapezoidal footing of size 7’6″x7’6″. give a detailed estimation and specifications

    Reply
  11. allconstruction activity norms,i.e. rcc,plastering, b/w,and others like painting ,pop norms(how much sand ,cement,metal1,2 etc.)

    Reply
  12. i want to know that how much of length increase when i am bending steel bar.

    bending of steel in 45 degree, 90 degree and hook (180 degree)

    dia of bar :- 8mm; 10 mm; 12mm ; 16 mm ; 20mm; 25mm ; 32 mm

    Reply
  13. it require as per grade of concrete like 1:2:4 it requires one part of cement and 2parts of fine aggregate and 4parts of coarse aggregate

    Reply
  14. hello,
    In slab and walls of RCC we used joints at 45 degree but nowadays designer has given us to leave joints vertical either ln slab and walls, Pls. you make me it clear which type of joint is good.

    Reply
  15. Hello,

    I hereby request for a price quotation for barriers so that i can know the price and how to press an order.

    Hoping for your quick reply.
    Thanks and best regards.
    Why dont you publish you email address on your website!!!!
    Kandwanaho Jonan

    Reply
    • Hello,
      You are welcome to ask any questions related to Civil engineering on the blog and I will make sure that I am able to answer all your questions.

      Benzujk

      Reply
  16. Are these specifications universal? Or can individual counties or regional building departs have more/less specific requirements?

    Reply
  17. footing size : 1.2m x1.2m
    column size :0.23m x 0.23 m
    depth of column : 1.5m
    soil density :18 kn/m
    please reinforcement steel detail & design.

    Reply
    • Hello Thiru,
      I don’t design. I help people clear their doubts in design. Foundation design guide is available on my site. Go through it and design the steel reinforcement for the structure. If you have any doubts or something you don’t understand feel free to ask a question.

      Reply
  18. I want to know that the Best Lenter of the House is RCC or Bricks.

    I can confuse, and I want to know that basically what cost of these lenter is 1000 sq. ft.

    Please tell me.

    Reply
    • Well, I could help you with the structural design basics if you want. But for that you have to provide me with a plan for which you need structural design so that we could discuss over it and do the best we can.

      Reply
  19. RCC Specification:
    -The specification of RCC band follows:

    #The RCC (Reinforced Cement Concrete) band is as wide as the thickness of wall and 75 mm to 100 mm thick and constructed using M 15(1:2:4) cement concrete.

    #Provide two bars 10 mm in diameter at its mid thickness along with 6mm diameter link @ the rate of 150 mm c/c throughout of the length of walls.

    #Use 12 mm diameter bars in seismic zone. In wall length more than 6m between cross wall.

    #Use 4 bars in 150 thick band.

    Reply

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