RCC building is currently the most popular building in
Nepal. RCC is one of the sophisticated technology ever discovered on building
technology. A lot of new innovations are still going on RCC. Engineers will
know in detail about RCC technology in detail.
If you want to construct a RCC building with least supervision of engineers, you would like to understand about the basic aspects of RCC building. We list here some of the most essential components of RCC building that you should know while being ready to construct a small house of your dream.
Ground Level is also called the Original Ground Level. This
is the level of the land upon which you are constructing a building. This level
holds its importance during planning stage. Your engineer must elevate the
plinth level of your building above 1.5 feet or 2 feet above ground level.
Sometimes, it can go even more, but it can’t come down to a foot.
Plinth Level is that level above the ground level which
separates the substructure with Superstructure. At the plinth level, there are
tie beams and damp proof course is applied at this level. This level separates
the earth element with the building element.
All the building construction works that are done above the
plinth level is called superstructure. This will include the ground floor too.
The load of the superstructure in the RCC building will be born by the columns.
The boundary between the super structure and substructure is Damp Proof Course
All the building construction works that are done below the
plinth level including the plinth beam and the damp proof course above the
plinth beam is called substructure. The function of the substructure is to
transfer the load coming from the column to the foundation and to increase the
stiffness of the building.
Damp Proof Course
Damp proof course is the layer which actually separates the
superstructure and substructure. Damp proof course is a 3-inches-max thick
layer that is usually applied as a mixture of thick mortar and Waterproof. A
thin layer of hot bitumen can also act as a good Damp proof course. Damp proof
course will effectively prevent the seepage making the ground floor walls of
your building damp.
Window and Doors
In a RCC structure, doors and windows are placed after casting the structure. The walls, doors and windows do not participate in load dissipation or do not come in the load path of the building. Lightweight doors and windows will therefore decrease the cost of your RCC building without compromising the security of the building too much.
The concrete which is cast in order to make the floor is
called floor concrete. It is done after ramming the earth and putting brick
soling above it. The ramming should be done at 15% moisture content for most
effective compaction. Floor concrete
will make the surface finished and it will also level the ground so that the
tenants will feel secured from underground animals and will have comfortable
living. Not only ground floor, floor concreting is done at every floor.
Typically, the thickness of floor concrete at ground floor is higher than that
at the top floors. Another term for floor concrete is PCC and the ratio of PCC
should be 1:2:4.
The layer which comes after the floor concrete is called
Floor finish. This is done at every floor. As floor concrete levels the
surface, floor finish will give the final look to the ground or slab upon which
you will rest. The typical weight of the floor finish is 1 kN/m2 for slabs.
The basement comes right above the foundation. It is a part
of substructure. Basement is often used as parking space. The space below
basement floor PCC and floor finish is the foundation layer itself. There could
be various foundations like mat foundation, combined footing or single footing,
depending on the results of structural analysis.
Brick masonry is the laying of brick in the substructure and
superstructure of the building. The mortar ratio for brick masonry should be at
least 1:6 or depending upon specifications. Brick masonry doesn’t transfer the
load in case of RCC structure. Crack is often a problem in Brick masonry but
there are various measures to all kinds of crack which you can read over here. Brick
masonry is important in substructure to prevent the cracks from propagating.