Branch-Civil Engineering Department

Semester - 4^th

Subject - CED-II

TOPIC - Detailed drawing of Irrigation Structure

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-:By:-

Mr. Prakash Chandra Mohapatra

AY-2021-2022

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Using command for drawing of Sarada Type Fall-

Line command- Specify first point-

Sets the starting point for the line. Click a point location. With object snaps or grid snap turned on, the points will be placed precisely. You can also enter coordinates. If instead, you press Enter at the prompt, a new line starts from the endpoint of the most recently created line, polyline, or arc. If the most recently created object is an arc, its endpoint defines the starting point of the line. The line is tangent to the arc.

Specify next point-

Specifies the endpoint of the line segment. You can also use polar and object snap tracking together with direct distance entry.

Offset-

You can offset an object at a specified distance or through a point. After you offset objects, you can trim and extend them as an efficient method to create drawings containing many parallel lines.

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The OFFSET command repeats for convenience. To exit the command, press Enter.

The following prompts are displayed.

Offset Distance

Creates an object at a specified distance from an existing object.

Command copy: To start the Copy tool from the command line, type “CO” and press [Enter]. Select the objects you wish to copy and press [Enter] to accept the selection. Click the base point as the point to copy from.

Fillet command

1. Click FILLET. or enter F in the Command line.
2. Select the first object.
3. Choose Radius in the command options, enter a radius, and press Enter. This number will be the radius of the arc between the two objects you fillet.
4. Select the second object.

Trim command- We can type ‘TR’ in the command bar and press the ‘Enter’ key two times.

Then direct select those objects or lines which we want to trim from the whole drawing or object.

Right-click for coming out from the selection.

By using this shortcut method, we can trim lines or objects from the drawing easily and quickly.

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Hatch command-

Fills an enclosed area or selected objects with a hatch pattern, solid fill, or gradient fill. Choose from the available hatch patterns, or use the User Defined command option to create custom hatches. Click HATCH.

Hatch an Area

1. Click Home tab > Draw panel > Hatch. ...
2. On the Properties panel Hatch Type list, select the type of hatch that you want to use. ...
3. On the Pattern panel, select a hatch pattern, such as ANSI31.
4. On the Boundaries panel, click Pick Points. ...
5. Click inside the circle, rectangle, and the triangle.

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siphon irrigation-

• A siphon is a tube which uses air pressure and gravity to run water up over a high place and down to where you want it. At the simplest they consist of a pipe with no working parts. To work they rely on the water level in the head ditch being at a higher level than the water level in the field being irrigated.
• A simple siphon raises water over a crest and discharges it at a lower level. As water flows through a siphon, energy due to pressure and elevation is either lost to pipe friction or converted to velocity energy.
• Due to the relative levels sometimes it is required to lower the bed of the irrigation channel of the drainage channel at their crossing.
• When the bed of the irrigation channel is depressed and taken under stream it is called an irrigation siphon.
• When the bed of the stream is depressed and taken under an irrigation channel it is called a drainage siphon.

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