Table of Contents
What is the minimum cover for footing?
For footings and other principal structural members in which the concrete is deposited directly against the ground, cover to the bottom reinforcement shall be 75 mm. If concrete is poured on a layer of lean concrete, the bottom cover maybe reduced to 50 mm.
What shall be the minimum clear cover for RCC column?
The nominal cover is the design depth of concrete cover to all-steel reinforcements. It shall be not less than the diameter of the bar….4.6.
Member | Minimum Cover |
---|---|
Slab | 20 mm |
Beam | 20 mm |
Column | 40 mm for d > 12 mm 25 mm for d < 12 mm |
Footing | 50 mm |
Which rod is best for pillar?
In India, the grades are Fe 550 D, Fe 600, Fe 640, CRS 500D,CRS 550D,CRS 600 etc. It is always better to choose high-quality TMT steel bars from any brand you purchase. If you stay in Earthquake prone zones, it is necessary for the TMT bars to be able to withhold the tremors, so high-grade TMT is a must.
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 …
What is nominal cover for column?
The nominal cover is the distance between the exposed concrete surface to nearest reinforcement bar ( it may be any bar main bar, longitudinal bar and even links or stirrups). The nominal cover should not be less than the diameter of the bar.
What is the minimum cover requirement for column and footing?
Generally, minimum size of nominal cover 40mm is apply for column, 25mm for beam,15 to 20 mm for slab, 15mm for staircase and 40 to 50mm for footing/Foundation.
What is clear cover of column?
The clear cover is simply the small distance between the outside surface of concrete and the reinforcement. i.e steel rod provided inside of that concrete structure. This clear cover for different structures depends upon the design of a structure that how much is its length, width, and load on the structure.
Which mm rod is used for pillar?
10mm and 12mm can be used in columns even for a 14 storied building. It depends on the design. 10mm can be used as binders in long shear walls also.
What is the minimum thickness of clear cover for a column?
Minimum clear cover to the reinforcement: 25 mm to bars in columns. In large columns, say 450 mm in thickness, the cover s hould be 40 mm. Clear Cover for Footings: Clear cover in footings
What is the standard size of columns?
First Of all, there is no standard size of columns. The size of column depends on several factors such as the type of column, load to be resisted and architectural utility of that column. Depending upon these factors we have to adopt or assume the column size and then need to check for safety.
What is the distance between two columns of size 9”X9”?
The distance between two columns of size 9”x9” should not be more than 4m centre to centre of column. If larger barrier-free distances are required then larger size columns should be used. The size of the columns should be increased because of two factors: 1.
What is the distance between two columns in a column layout?
Distance Between Columns: Try to maintain equal distance between the centers of two columns. Always plan a column layout on a grid. The distance between two columns of size 9”x9” should not be more than 4m centre to centre of column.
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