| |
Back
Direct Readings | Up
Builder 3&2 Volume 01 - Construction manual for building structures | Next
Rod Levels |
Figure 5-10.—Philadelphia rod marking.
inch. The indicated reading of the target can be read
Figure 5-11.—Direct reading of 5.76 ft on Philadelphia rod.
either by the rodman or the instrumentman. In figure
5-12, you can see that the 0 on the vernier scale is in
exact alignment with the 4-foot mark. If the position
of the 0 on the target is not in exact alignment with a
line on the rod, go up the vernier scale on the target to
the line that is in exact alignment with the hundredths
line on the rod, and the number located will be the
reading in thousandths.
Figure 5-12.—Target.
5-7
|
