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88
Manhole
Drop Manhole
Standard Setup Procedures
1.
Set the grade. Enter the required grade for
the pipe to be laid in the display of the Piper.
2.
Set the elevation. Place the Piper in the
manhole. Move the Piper up or down on the
(optional) trivet until the required height is
set. Choose the most convenient method for
determining the cut-to-invert distance.
3.
Set the line. Locate the line for the laser beam.
Locate Point A. Place a transit over the centre of the manhole.
a)
Locate Point B. Look through the transit and lock it on-line with
b)
the next manhole point.
Locate Point C. Hang a plumb bob from the transit. Move the
c)
Piper until the tip of the plumb bob is directly over the pivot
point on the top of the Piper.
Locate Point D. Tilt the transit down and use it to align a new
d)
stake approximately 5 m (15 ft) in front of the Piper. Look
through the transit and move the beam using the LEFT and
RIGHT buttons on the remote control until the beam hits the
stake and intersects with the transit's cross-hairs.
☞
The trivet pole or the complete trivet assembly is designed to attach
directly to a drop manhole T-bar assembly using a 5/8 "-11 mount.
A
B
D
C
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