The Upper / Lower “Laser Plummet”

Feature –

The Upper / Lower “Laser Plummet” (refers to Zenith and Nadir in the industry) or in layman’s terms simply up and down plumb beam.

This feature is used for alignment of the instrument on the pit floor where the “control Point” has been positioned as the starting point. Pipelaying for Sewer and / or  Stormwater, accuracy is critical. Any inaccurate setups over the control point cause costly and time consuming “errors”.

Benefit –

• Benefit – 1. Makes Initial Set Up Faster / Easier and Substantially More Accurate,
  • Plumb Down beam over the pit floor control point for set up and the upper beam for the transit or theodolite for the direction & alignment of pipe.   Eliminates swinging a Plumb Bob.
• Benefit – 2. Reduces the likelihood of a Grade Error,
  • Second day set ups -is where this feature reaps the maximum benefit to eliminate the incorrect positioning of the laser i.e offset affects grade / length, which could / would result in costs for rework / materials / labour etc,
• Benefit – 3. Reduces the likelihood of Alignment Errors,
  • Set Up errors for alignment to the forward manhole is a huge problem caused by improper positioning of the laser under a transit or theodolite, without an upper plumb beam to the transit / theodolite – contractors use a plumb bob which is normally the main cause of alignment issues. This feature eliminates this issue which could / would result in costs for rework / materials / labour etc,