1.0 Coordinate & Measurement Systems
The metric system is used in Quick Pole for all measurable quantities. Where desired or necessary, conversions are made in Quick Pole to English "Imperial" units. The following table gives a short comparison of the English and metric systems:
|Measurement||Metric||English||Metric to English Factor|
|Stress||Mega-Pascal||Pounds per square inch||145.0389|
NOTE: One Mega-Pascal = 1,000,000 Newtons per square metre
The rectangular coordinate system is used to analyze each pole within the project, with it's origin at the butt of the pole (usually below the ground line) and the "y" axis pointing to the top of the pole as shown in the figure below. Positive forces are shown in the corresponding positive axis direction. Positive moments follow the right-hand rule along their axis. That is, if the thumb of your right hand was put in the positive axis direction, then the fingers would naturally curl in the direction of positive moments.
For each attachment and corresponding loads that are placed on the pole, their forces, weights and moments are converted into values for this coordinate system. Often one particular force or moment will convert into having values along more than one axis. Likewise, all resulting forces and moments after the analysis are based on this same coordinate system as well.
On a more global viewpoint, an entire project's workspace will have the location of each pole and anchor specified in terms of Longitude and Latitude. Latitude values increase in the positive "X" direction (to the right in the workspace). Longitude values increase in value in the positive "Z" direction (to the bottom of the workspace). The distance and angles between each object on the workspace is computed based on these Longitude and Latitude values. If exact GPS coordinates are not available, Quick Pole can still compute everything it needs from the objects being located on the workspace.