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Basic problems in chaining - To drop a perpendicular to chain line
Unit 1- Surveying
Basic Problems in chaining
To drop a perpendicular to chain line from a point outside it
I Method
To drop a perpendicular to chain line from a point outside it
I Method
AB is the chain line. It is required to drop a perpendicular to a chain line AB from point ‘D’ out side it. Select any point ‘E’ on the chain line. With ‘D’ as center, and DE as radius, draw an arc to cut the chain line at F. Bisect EF at ‘C’ and then CD is perpendicular to chain line AB.
II Method Select any point E on the line (Fig(b)). Join ED and bisect it at F. With F as centre and EF or FD as radius, draw an arc to cut the chain line in C, CD will be perpendicular to the chain line.
Last modified: Thursday, 28 April 2011, 9:22 AM