Veer Buildhouse: Structure

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Showing posts with label Structure. Show all posts
Showing posts with label Structure. Show all posts

Wednesday, November 17, 2021

Basic Rules in Column Design | Civil Engineering

7:14 PM 0

 

Basic Rules in Column Design | Minimum Column Size | Concrete Cover | Spacing of Lateral Ties | Civil Engineering



The column design is one of the important aspect in building design for construction of any safe structures. While designing the column section we have to follow the basic rules as per the standards which is provided by the code provisions.



These basic rules will helps to create better and safe structure under the consideration of building specifications. The following are the basic rules to be considered before designing of column.

  1. Minimum Column size
  2. Minimum Diameter of the bars
  3. Minimum Grade of the concrete
  4. Concrete cover
  5. Use square columns
  6. Spacing of lateral ties
  7. Minimum number of bars
  8. Top and bottom area of column
  9. Center to center distance 



1. Minimum column size

The minimum column size as per code provision is taken as 9”X9” for building structure, depending upon the loading condition and building specification the column size may varies. If the loading on the structure is higher than we have give suitable dimensions of column which is greater than minimum sizes (9”X9”).




2. Minimum Diameter meter of the bars

The minimum diameter is the second basic rule to be considered in building design, as per the code provisions the minimum diameter of bar is taken as12mm. And the maximum diameter is depending upon the design considerations.


3. Minimum Grade of the concrete

Grade of the concrete is nothing but the proportions of ingredients used to make concrete mixture. Basically concrete is a mixture of cement, sand, aggregates, water and admixture if required, the strength of concrete is depends upon the mix proportion of ingredients. As per standard the minimum grade of concrete should be M20 with mix proportion of 1:1.5:3 for building design.   


4. Concrete cover

The concrete cover is the third factor to be considered in building design as per the standards the cover is the 10% the higher dimensions of beam or column. Let us consider an example column which is having 230mmX350mm dimensions the higher dimension of this column is 350mm and 10% of 350 which is 35mm. So the cover of column section is taken as 35mm.


5. Use square columns

The geometry of column is also important aspect in building design for buildings basically we use square, rectangular, circular or polygon sections. But as per the code provisions only use square column section is preferable than other geometry because the loading distribution is even in square column section than other geometry.


6. Spacing of lateral ties

The spacing of the lateral ties is 100mm to 200mm for safe structure design. If we increase the spacing beyond 200mm the column section buckling effect will occur.




7. Minimum number of bars

The number of the bars is seventh factor taken in basic rules in column design. For basic building the 4 number of bars is sufficient as per code provisions.



8. Top and bottom area of column

The cross section of column is taken as same throughout the building structure from bottom to top.  For example if we want to build G+5 building model 18”X18” to be taken as the dimensions of the column the same dimension to be provided from base to sixth floor for the building.



9. Center to center distance

The center to center distance between the columns is also important aspect in column design. The minimum center to center distance is 3m and the maximum center to center distance is 5m to be taken as per the standards which is provided by the code.



Thank You

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Monday, August 2, 2021

50 फीट हाल मे बीम ? 50 feet Span Beam Design | depth and reinforcement o...

12:01 AM 0
50 फीट हाल मे बीम ? 50 feet Span Beam Design | depth and reinforcement of beam for 50 feet span





50 फीट हाल मे बीम ?
50 feet Span Beam Design
depth and reinforcement of beam for 50 feet span
hall me beam ka size
g+3 building beam size and reinforcement
20 feet me beam ka size or sariya
bade hall ke liye beam ki depth or loha
depth and reinforcement of beam in 50 span
50 feet hall me beam ka size or sariya
25 feet span beam design
50 feet span rcc beam
40 feet span rcc beam
30 feet span rcc beam
50 feet span beam design


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Saturday, June 12, 2021

Difference Between PCC (Plain Cement Concrete) & RCC (Reinforced Cement ...

1:11 AM 0
  Difference Between PCC (Plain Cement Concrete) & RCC (Reinforced Cement Concrete)


Plain concrete, also known as plain cement concrete or PCC, is most commonly used for paving and flooring. Made from a mix of cement, sand, aggregate, and water

Reinforced concrete, or reinforced cement concrete (RCC), is actually very similar to PCC in terms of materials used.

The one big difference in its composition is the addition of steel rebar.

PCC:

No reinforcement is introduced
Only gives strength in compression
Cheaper
Less time consuming due to no reinforcement

RCC:

Reinforcement is used in RCC
More strength
Steel = Tensile Strength,
Concrete = Compressive Strength
Expensive depending on the amount of steel bars and skilled labor involved
Time consuming


PCC - Plain Cement Concrete - Grades - M5,M7.5,M10,M15.

Usage : PCC used as bed concrete for Footing,plinth beam and Flooring.

RCC - Reinforced Cement Concrete - Grades - M20,M25,M30,M35,M40,M45,M50 etc.

Usage : RCC used in structural works like columns,beams,Plinth beam , footings,slabs ,Retaining walls, shear walls.

Reinforced = Strengthen/support concrete with steel bars.

As concrete is good in compression and steel is good in tension.

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Monday, January 13, 2020

TYPES OF STAIRS

7:28 PM 0

                     TYPES OF STAIRS



(1) STRAIGHT STAIR :- 

A STRAIGHT FLIGHT IS ONE IN WHICH ALL STEPS ARE PARALLEL TO ONE AND ANOTHER AND RISES IN THE SAME DIRECTION.

(2) DOG-LEGGED STAIR :-

 A DOG LEGGED SAIR IS CALLED FROM ITS BEING BENT OR CROOKED SUDDENLY ROUND IN FANCIED RESEMBLANCE TO DOG’S LEG.




(3) OPEN WELL STAIR :-

 AN OPEN WELL STAIR GIVES SATISFACTORY RESULTS AND HENCE IT SHOULD BE TRIED TO PROVIDE AN OPEN WELL STAIR IT REQUIRES A LITTLE MORE SPACE THEN A DOG LEGGED STAIR.

(4) GEOMETRICAL STAIRS :-

 SUCH A STAIR REQUIRES LITTLE MORE WIDTH, BUT ONLY ABOUT THE SAME LENGTH OF A SPACE AS A DOG LEGGED STAIR.


(5) CIRCULAR STAIRS :- 

CIRCULAR STAIRS ARE GENERALLY PROVIDED AT THE BACK SIDE OF THE BUILDING FOR RENDERING ACCESS TO IT’S VARIOUS FLOORS FOR SERVICE PURPOSE. THIS TYPE OF STAIR MOSTLY CONSTRUCTED IN R.C.C. AND IRON.

(6) BIFURCATED STAIR :- 

THIS TYPE OF STAIR IS VERY COMMON IN PUBLIC BUILDING IN IT THE BOTTOM WIDE FLIGHT IS DIVIDED AT A LANDING INTO TWO NARROWER FLIGHTS WHICH BRANCH OFF TO THE RIGHT AND LEFT






NOTE :- (THE MAX NO. OF STEPS IN ONE FLIGHT SHOULD NOT BE MORE THAN 12)


-----------------------xx --------------------- x x -----------------------x x------------------------



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Saturday, December 29, 2018

COLUMN AS PER IS 456:2000

5:42 AM 0

              COLUMN (AS PER IS 456:2000)

INTRODUCTION :- A COLUMN OR STRUT IS A COMPRESSION MEMBER. WHEN A MEMBER CARRYING MAINLY AXIAL LOAD IS VERTICAL, IT IS A TERMED AS ‘COLUMN’ WHILE IF IT IS A INCLINED COLUMN, IT IS TERMED AS A ‘STRUT’.

SLENDERNESS RATIO :- IT IS A THE RATIO OF EFFECTIVE LENGTH OF THE COLUMN TO LEAST LATERAL DIMENSION.
S.R. =  Lef/ b







TYPES OF COLUMNS :-
Lef/ b < 12
(a)     SHORT COLUMN :- THE COLUMN IS CONSIDERED AS SHORT WHEN THE SLENDERNESS RATIO OF COLUMN IS LESS THAN OR EQUAL TO 12.

(b)    LONG COLUMN :- THE COLUMN IS CONSIDERED AS SHORT WHEN THE SLENDERNESS RATIO OF COLUMN IS LESS THAN OR EQUAL TO 12.
Lef/ b > 12





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Sunday, September 30, 2018

BEAMS

4:50 PM 0

    BEAMS


       A beam is a horizontal structural element that is capable of withstanding load primarily by   resisting bending. The bending force induced into the material of the beam as a result of the external loads, own weight, span and external reactions to these loads is called a bending moment.

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STEEL BARS

4:49 PM 0


STEEL BARS (REBARS)


         Rebar (short for reinforcing bar), also known as reinforcing steel and reinforcement steel, is a steel bar or mesh of steel wires used as a tension device in reinforced concrete and reinforced masonry structures, to strengthen and hold the concrete in compression. The surface of the rebar may be patterned to form a better bond with the concrete. It is also known as reinforcing steel or reinforcement steel.
Rebars used on site are HYSD (FE 415) of various dia such as 10mm, 12mm, 16mm etc
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