DETAILS ABOUT ADVANCED SURVEYING RANGING RODS AND CHAINS

Rod which are used for ranging a line are known as ranging rods.They are generally circular in section of 25 mm diameter and 2 m length. Sometimes wooden ranging rods are square in section.The rod is divided into equal part of 20 cm each and the divisions are painted black and white or red and white. The lower end of the rod is pointed or provided with an iron shoe.

A chain is prepared with 100 or 150 pieces of galvanized mild steel wire of  4 mm diameter.Tallies are provided at every 10 or 25 links for facility of counting.

ADVANCED SURVEYING INSTRUMENT