The Old Method
Invert data can generally be collected on structures through direct vertical measurements such as using a box tape or measuring rod, but these methods do not generally work on recessed or hard to reach structures such as pipes, drop inlets, catch basins and many other drainage structures. These methods lead to estimations, inaccurate data, and often multiple site visits to confirm measurements.
A New Method
Recently a new method has been developed that enables one to collect redundant invert data at any angle by using a lightweight calibrated measurement rod. The vert rod is a four-sided calibrated measurement rod with each side of the rod calibrated to common recessed angles. When the rod is aligned to the angle of a particular side, the vertical distance is achieved rather than the slope distance.
Introducing the 15ft Vert Rod by Accurate Inverts
The 15 ft Vert rod by Accurate Inverts is calibrated to the cosine of each sides corresponding angle, ranging from 0-30o . The rod also includes a digital angle finder which allows field crews to use any angle and quickly achieve a redundancy of measurement.
Redundancy can be achieved by measuring multiple angles or by using the 0 side to measure the slope distance and the angle. By noting the slope distance on a random angle, the vertical distance can be calculated later as a check. If one aligned the angle finder on the 0 side to 30o, read a slope distance of 11.55 and multiplied by the Cosine of 30o the vertical measurement is 10 which is exactly the same measurement you would achieve with the calibrated 30o side of the rod. Each side is calibrated this way, but the 0 side also allows one to measure custom angles. This new methodology allows field crews to quickly and accurately collect invert measurements without the need to second guess measurements also allowing redundant office checks to verify accuracy.
For more information or any questions please visit us at AccurateInverts.com.