Topic- Plan , section and elevation of Flat Roof Building
Sem-3rd
:-BY:-
Er. Raghabendra Mohapatra
AY-2021-2022
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Flat Roof or Terrace Roofing - A roof laid at an angle of less than 10° to the horizontal is known as flat roof. Flat roof may be of reinforced cement concrete, reinforced brick work, precast concrete with channel units, waffle units etc, flag stones supported on rolled steel joists or jack arch type.
Advantages of Flat Roof
The construction of flat roof is simplified and maintenance is easy.
The roof can be used as terrace for playing, gardening, sleeping and for celebrating functions.
It is easier to make the flat roof fire-proof than a sloping roof.
They avoid the enclosure of the triangular space. This improves the architectural appearance of the building.
Flat roofs have better insulating properties and they are more stable against high winds.
The construction work of upper floors can be easily started. In case of a pitched roof, the entire roof is to be removed and is to be replaced by a new roof under such circumstances. It is therefore considered to be the best choice for multi-storeyed buildings.
They do not require false ceiling, which is essential in pitched roofs.
Flat roofs are proved to be overall economical.
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An elevation drawing is an orthographic projection drawing that shows one side of the house. The purpose of an elevation drawing is to show the finished appearance of a given side of the house and furnish vertical height dimensions. Four elevations are customarily drawn, one for each side of the house.
plan elevation in engineering drawing-
It is the two dimensional, flat, representation of one facade. It displays heights of key features of the development in relation to a fixed point such as natural ground level.
elevation plan and its types-
An elevation plan or an elevation drawing is a 2D view of a building or a house seen from one side. In general, the elevation floor plan is a two-dimensional flat visual representation of one facade as it displays the height of key features of the development about a fixed point from the ground level.
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Using command-
Set the unit as per scale denoted in drawing
Set the limit
Then draw line diagram using line command-L enter
Using offset and trim command-off enter
tr enter
Specify the proper dimension
Draw the plan elevation and sectional elevation
Draw the stair case as per given drawiong using above command