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Chaining - Instruments used for chaining - Pegs & plumb bob
Unit 1- Surveying
Chaining: Instruments used for chaining
Pegs:
Wooden pegs are used to mark the positions of the stations or terminal points of survey lines. They are made of stout timber. These are available about 2.5 to 3 cm square and 15 cm length. They are driven in the ground with the help of a wooden hammer and kept about 4 cm projection above the ground.
Plumb bob:
While chaining along a sloping ground, a plumb bob is required to transfer the points to the ground. It is used as centering aid in the theodolites, compass, plane table and a variety of other survey instruments.
Wooden pegs are used to mark the positions of the stations or terminal points of survey lines. They are made of stout timber. These are available about 2.5 to 3 cm square and 15 cm length. They are driven in the ground with the help of a wooden hammer and kept about 4 cm projection above the ground.
Plumb bob:
While chaining along a sloping ground, a plumb bob is required to transfer the points to the ground. It is used as centering aid in the theodolites, compass, plane table and a variety of other survey instruments.
Last modified: Thursday, 21 April 2011, 9:49 AM