As per IS 456:2000, In Rectangular/circular/ square/helical RCC column, compressive member, vertical support, minimum diameter of reinforcement bar/ longitudinal bar used is 12mm. All structural engineer recommends 12mm dia bar as minimum diameter of bar for column.
In this post
Which mm bar is used in column?
Column is a compression element and the bars may be prone to buckling. hence a min size of 12 mm is specified for rebars in almost all codes.
Can we provide 10 mm diameter bar as longitudinal reinforcement in RCC column?
The main longitudinal reinforcement bars used in column shall not be less than 12 mm in diameter.
Which bar is used in column?
A column is a vertical compression member which transmits the load of the structure to foundations. They are reinforced by means of vertical bars to resist compression and/or bending, and transverse steel (closed ties) to resist shearing forces.
Which bar is best for column?
According to general thumb rule, we will assume a structure of G+0/1 storey/ground floor/one floor residential building, using standard 9″ thick walls, the best mm bar used for 1 storey/G+0 building, we should use steel bar of 10mm dia for footing, 12mm dia of steel bar used for column, combination of 10mm & 12mm dia
Can I use 10mm bar in beam?
10 mm dia bar can very well be used for the longitudinal reinforcemnt of a particular beam, but it all depends uopn the size and span of the beam, load over it . In short , while designing , designer calculates the required cross section area of steel required .
What is the minimum size of reinforcement bars in RCC columns?
12 mm
Minimum diameter of longitudinal reinforcement bars: The main longitudinal reinforcement bars used in the column shall not be less than 12 mm in diameter.
Can we use 12mm dia bar in columns?
All structural engineer recommends 12mm dia bar as minimum diameter of bar for column.
Can we use 10mm bar in slab?
Bars in slab
like in slab we generally use 8mm, 10mm , 12mm because load is less as compared to beam , column, footing.
What is the minimum diameter of longitudinal bars of a column?
12 mm
The diameter of longitudinal bar of column is not less than 12 mm.
Which size of TMT bar is good for construction?
8mm-10mm size bars are used in Slabs and Stair ups, which serves as a load bearing member in slab homes. 12mm-25mm size bars are used in Beams & Columns, to make them withstand external loads. 32mm-36mm size bars are used in the construction of very complex projects like dams, bridges.
What is the weight of 10mm rod?
10mm rod weight:- 10mm rod supplied in U shaped bent or straight, a length of about 12 metres or 40 feet, generally 10mm rod weight around 7.407kg/ piece, 0.617kg/m or 0.188 kg/foot.
What is the minimum bar diameter for footing?
Minimum reinforcement and bar diameter
The minimum diameter for main reinforcement should not be less than 10 mm.
How much load can a column support?
Volume of Concrete = 0.23 x 0.60 x 3 =0.414m³ Weight of Concrete = 0.414 x 2400 = 993.6 kg. Weight of Steel (1%) in Concrete = 0.414x 0.01 x 8000 = 33 kg.
What is the minimum size of column?
The minimum size of a column should not be less than 9”x9” for single story structure with M15 (1:2:4) concrete. If 9”x9” columns are to be used in one and half story building, always use M20 (1:1.5:3) concrete. If you use M15 concrete for one and half story structure the column size should not be less than 12”x9”.
What is the standard size of column for 2 storey house?
Column size for 2 storey (G+1) building:- For this general thumb rule, we will assume a structure of G+1 (2 storey) residential building, using standard 5″ walls, size of an RCC column should be 9”x 12” (230mm x 300mm) with 6 bars of 12mm Fe500 Steel with m20 grade of concrete and stirrups of T8@6″C/C.
How many steel bars are in a column?
3) n = Asc/πD2/4, this formula is used to calculate number of steel bar in a RCC column if their area of Steel diameter of bar is given. 4) Asc = n×πD2/4, this formula is used to calculate area of Steel in RCC column if their size and number of steel is given.
What can be the maximum size of reinforcement bar?
As per IS 456: 2000, Clause 26.5. 2.2, Maximum Diameter: The diameter of the reinforcing bar shall not exceed one-eighth of the total thickness of the slab.
Can we use 12mm dia bar in slab?
Clause 26.5. 2.2 of IS 456:2000 states that ‘the diameter of reinforcing bars shall not exceed one-eighth of the total thickness of slab. Bars shall not be less than 12 mm in diameter for columns.
Which mm rod is used for pillar?
Iron rod size for 2 storey (G+1) building:– According to general thumb rule, we will assume a structure of G+1 (2 storey) residential building,using standard 9″ thick walls,we should use iron rod size of 10mm as mesh bar for footing, 6nos of 12mm size used for column, 4nos of 12mm size used for beam and 10mm & 8mm iron
What is minimum reinforcement in column?
The minimum reinforcement ratio for column is 0.01.