Site pages
Current course
Participants
General
18 February - 24 February
25 February - 3 March
4 March - 10 March
11 March - 17 March
18 March - 24 March
25 March - 31 March
1 April - 7 April
8 April - 14 April
15 April - 21 April
22 April - 28 April
Chaining - Instruments used for chaining - Ranging rods
Unit 1- Surveying
Ranging rods
Ranging rods have a length of 2 or 3 m. It is made up of well seasoned wood or steel conduit. Ranging rods are having circular or octagonal shape with 3 cm cross section. They are shod at the bottom with a heavy iron point. The ranging rods are painted alternatively with two colours (Black and White or Red and White). Ranging rods are used to range some intermediate points in the survey line. These rods are can also be used for rough measurement of short length.
Ranging rods have a length of 2 or 3 m. It is made up of well seasoned wood or steel conduit. Ranging rods are having circular or octagonal shape with 3 cm cross section. They are shod at the bottom with a heavy iron point. The ranging rods are painted alternatively with two colours (Black and White or Red and White). Ranging rods are used to range some intermediate points in the survey line. These rods are can also be used for rough measurement of short length.
Arrows:
An arrow is made up of steel wire. It is inserted into the ground after every chain length measured on the ground. It consists of 50 mm loop at top and 400 mm length.
An arrow is made up of steel wire. It is inserted into the ground after every chain length measured on the ground. It consists of 50 mm loop at top and 400 mm length.
Last modified: Thursday, 21 April 2011, 9:41 AM