What is a concrete jacketing of column?
The concrete jacketing of column is the thickness of the concrete surrounding the reinforcing bars. It has terms
and conditions that vary depending on the type of item and the surrounding environment.
Everyone checks during the receipt of the various concrete works on the the concrete jacketing of column size
as it protects the reinforcing bars from weather factors and prevents and reduces the chances of rust and
corrosion.
What is a clear jacketing of column?
It is the measured distance between the outside exposed concrete surface and the nearest surface of the steel reinforcement.
While studying detailed drawings of sections of reinforced concrete elements or even preparing tables for
the inventory and individualization of reinforcing steel, you will encounter the term concrete jacketing of
column.
Various methods are available for measuring concrete jacketing of column, and other terms such as net
cover, nominal cover, and efficient cover engineers use to define this.
Jacketing of column for Reinforced Concrete Sections – Definition, Importance, and Minimum Limits
What is a nominal jacketing of column?
According to the construction standard, the term net cover follows the nominal cover idioms symbolical covering is the measured distance between the exposed concrete surface and the nearest rebar, up to the beam cantilever.
It should not be less than the diameter of the largest armature.
What is the minimum jacketing of column according to how aggressive the surrounding environment is?
Light: 20 cm
- Moderate: 30 cm
- severe: 45 cm
- Very severe: 50 cm
- Hard: 75 cm
Which jacketing of column is effective or not included in the design calculations?
Unlike elements subjected to compressive forces such as columns, the effective jacketing of columns is
used primarily in design calculations but minus that the engineers neglect.
It is the measured distance between the exposed concrete surface and the midpoint of the central steel reinforcement, Or it is the distance measured between the outer face of the reinforced concrete member
and the middle of the center tension reinforcement zone.
Disadvantages of increasing jacketing of column
Increasing the jacketing of column increases the protection of reinforcement and fire resistance, but if this
cover exceeds the permissible limit, which is approximately 75 cm, cracks or cracks will occur in this area.
When Clefts increase the chances of rust and corrosion of reinforcing, shedding the cover, cladding, and finishes
and distorting the aesthetic appearance.
Falling jacketing of column
The rusting process of steel reinforcement causes the fall of the jacketing of column but The reinforcing rod
bulges and causes pressure and pushes, causing the jacketing of column to fall off.
It often occurs in poorly insulated bathroom tiles and roofs exposed to rain without proper waterproofing.
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