Ranging Rods and Ranging Poles

Ranging rods and ranging poles are used for ranging intermediate points along the line to be measured. Ranging rods are 2 to 3 m long and made of hard wood. They are provided along with iron shoe at one end as shown in given figure.

Usually they are circular in section with 30 mm diameter and painted with 200 mm colour bands of white and red or with black and white. If distance is more than 200 m, they can be provided with multicoloured flags at their top for clear visibility. Since they are painted with alternate colour of band 200 mm ranging rods are rarely used to measure short distances. Except that they are longer Ranging poles are similar to ranging rods. Their length varies in the range 4 m to 8 m and diameter from the range 60 mm to 100 mm. They are made of or steel or hard wood. In the ground they are fixed by making 0.5 m holes and then packed to keep them vertical.

                      Ranging rod                                         Offset rod