3 : Leveling Rod

Question 1

a graduated rod used for measuring the vertical distance between the line of sight through a leveling instrument and the point whose elevation is either required or known.

Answer 1

Leveling Rod

Question 2

it can be read directly by the instrument man through the telescope by noting the apparent intersection of the horizontal hair on the rod

Answer 2

Self-leveling Rod

Question 3

has a sliding target which is set and read by a rodman at the position selected by the instrument man (used when longer distances are involved)

Answer 3

Target Rod

Question 3

combination of self- reading and target rod. It is made in two sections in which the rear section slides over the front section.

Answer 3

Philadelphia Rod

Question 4

comes in three sliding sections and usually extends to either three or four meters. It is graduated similar to the Philadelphia rod except that the figures on the face of the rod are wider and is suitable for longer distances.

Answer 4

Chicago Rod

Question 5

• an improvised type of rod used in leveling work.
• the graduations on this rod are marked either on canvass or metal strips which are attached to a long piece of selected lumber by staples

Answer 5

Rod Ribbons

Question 6

a form of rod ribbon which uses a graduated invar strip permanently
fastened to a 4-meter long wooden or metal frame

Answer 6

Precise Rod

Question 7

• a form of rod ribbon which uses a graduated nilvar metal strip.
• the graduations on this rod are painted upside down for use with inverting telescopes

Answer 7

Geodetic Rod

Question 8

• also known as the automatic rod
• used when numerous elevations are to be determined from a single set-up of the leveling instrument

Answer 8

Tape Rod

Question 9

• a device used for fast and correct plumbing of a rod
• L-shape in design

Answer 9

Rod Level

Question 10

a small device attached to a rod when extremely long sights make direct reading of the rod difficult or impossible

Answer 10

Target