OTHER EQUIPMENT Ranging Rods – Poles of circular
Description: OTHER EQUIPMENT Ranging Rods Poles of circular section 2m, 2.5m or 3m long, painted with character red and white bands which are usually 0.5m long, and tipped with a pointed steel shoe to enable them penetrate the ground. Use Used in
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slide1. OTHER EQUIPMENT
Ranging Rods – Poles of circular section 2m, 2.5m or 3m long, painted with
character red and white bands which are usually 0.5m long, and tipped with a
pointed steel shoe to enable them penetrate the ground.
Use – Used in the measurement of lines with the chain and for marking any points
which required to be seen.
Arrows: they are steel skewers and about 40mm long and 3 to 4mm diameter .A
piece of red ribbon at the top enable them to be seen more clearly. An arrow with
a lump of lead at its bottom end is occasionally used as a term of plumb- bob.
8 Engrs. O.J. Adeosun and A. Sobowale
Use –When chaining a long line, the chain has to be laid down a number of times
and the positions of the ends are marked with arrows.
Pegs – They are wooden of typical size of 40mm x 40mm x 0.4m long.
Use – Points which required to be more permanently marked, such a the
intersection point of chain line are marked by nails set in the top of oak pays divine
into the ground by a mallet.<br>
slide2. ANGLE MEASUREMENTS AND LEVEL READINGS The instruments used for these observations are, theodolites and level respectively which a common feature in the telescope. The telescope:- In its simplest from, the telescope comprises on objective, an eyepiece and a diaphragm. The objective produce an inverted image at the diaphragm and this is magnified by the eyepiece Use function Engrs. O.J. Adeosun 9 and A. Sobowale It fixes accurately the line of sight (collimation) from a point over the instrument state to some distant point.<br>
Ranging Rods – Poles of circular section 2m, 2.5m or 3m long, painted with
character red and white bands which are usually 0.5m long, and tipped with a
pointed steel shoe to enable them penetrate the ground.
Use – Used in the measurement of lines with the chain and for marking any points
which required to be seen.
Arrows: they are steel skewers and about 40mm long and 3 to 4mm diameter .A
piece of red ribbon at the top enable them to be seen more clearly. An arrow with
a lump of lead at its bottom end is occasionally used as a term of plumb- bob.
8 Engrs. O.J. Adeosun and A. Sobowale
Use –When chaining a long line, the chain has to be laid down a number of times
and the positions of the ends are marked with arrows.
Pegs – They are wooden of typical size of 40mm x 40mm x 0.4m long.
Use – Points which required to be more permanently marked, such a the
intersection point of chain line are marked by nails set in the top of oak pays divine
into the ground by a mallet.<br>
slide2. ANGLE MEASUREMENTS AND LEVEL READINGS The instruments used for these observations are, theodolites and level respectively which a common feature in the telescope. The telescope:- In its simplest from, the telescope comprises on objective, an eyepiece and a diaphragm. The objective produce an inverted image at the diaphragm and this is magnified by the eyepiece Use function Engrs. O.J. Adeosun 9 and A. Sobowale It fixes accurately the line of sight (collimation) from a point over the instrument state to some distant point.<br>