
Quick, Redundant, and Accurate inverts
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 foursided 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 030^{o }. ^{ }The rod also includes a digital angle finder which allows field crews to use any angle and quickly achieve a redundancy of measurement. And for added ease, we also included an attached slide marker to help visually confirm pipe sizes.
Redundancy can be achieved by measuring with the multiple calibrated angle sides 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 an office check.
If one aligned the angle finder on the 0 side to 30^{o}, read a slope distance of 11.55 and multiplied by the Cosine of 30^{o }the vertical measurement is 10.002 which is exactly the same measurement you would achieve with the rods calibrated 30^{o }side.
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 while also allowing redundant office checks to verify accuracy.
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