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DEPARTMENT OF CIVIL ENGINEERING

Sub - CED-I

Topic - Plan , Elevation and Section of Inclined Roof Building

Sem-3^rd

:-BY:-

Er. Raghabendra Mohapatra

AY-2021-2022

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Incline roof-

Slope is the incline of the roof expressed as a ratio of the vertical rise of the horizontal run, where the run is some portion of the span. This ratio is always expressed as inches per foot. A roof that rises 4 inches for every 1 foot or 12 inches of the run is said to have a "4 in 12" slope.
The pitched roof generally has a sloping top surface, which is useful in places with heavy rainfall or snowfall. It is one of the cheapest and most economical alternatives for covering the structure. Pitched roofs are generally used in factories and workshops, godowns and warehouses, theaters and auditoriums, and in hilly regions.
The climatic condition of the site, nature of the covering material, span, and other factors are all responsible for the slope of the roof. It is designed keeping all these aspects into consideration.

Different Components Used in Pitched Roof :

Span :
The horizontal distance between the internal faces of walls or supports is called as span.
Rise :
The vertical distance between the wall plate and top of the ridge is know as rise.
Pitch :
The inclination of the sides of a roof to the horizontal plane is called as pitch.
Ridge :
Apex line of the sloping roof is called as ridge.
Hip :
The ridge formed by the intersection of 2 sloped surfaces having an exterior angle more than 180° is called as hip.

Using command-

trim command - Tr enter enter

Open the tool palette that contains the roof tool you want to use, and select the tool.
Alternatively, you can click Home tab - Build panel - Roof Slab drop-down Roof.
On the Properties palette, select Single slope or Double slope for Shape.
In the drawing area, specify points for the corners of the roof.
When you are finished specifying points, press Enter.