O-Calc Pro Technical Note for version 5.0.3.18012 rev2

This O-Calc Pro Technical Note address remediation of two defects that were introduced 
with the release of O-Calc Pro Version 5.03 up to and including Build 5.0.3.18012, 
built on 2018-03-08 02:20 PM. It is recommended that the release O-Calc Pro Version 
5.03 (5.0.3.18012), built on 2018-05-18 12:19 PM be download from the O-Calc Pro 
installation site to correct these defects.

O-Calc Pro Installation site: (https://www.o-calcpro.com/PPL/NewVersionAvailable.html)

Error in the Sag/Tension Calculation
With the release of O-Calc Pro Version 5.03, the modeling of the O-Calc Pro tension and 
sag functionality was enhanced to better model how the wind interacts with the span 
geometry at oblique angles. The goal of this enhancement was to better model how the span’s 
blowout reacts to the wind at relative angles other than 0 and 90 degrees. Unfortunately, 
a calculation defect was introduced that overcompensated for this effect when tensions in 
spans were being modeled in either ‘Sag to Tension’ mode or ‘Tension to Sag’ mode. This 
overcompensation was most dramatic as the span angles deviated more from tangent angles. 

Note: this defect was not introduced if modeling tensions and sags in O-Calc Pro using 
Static, Slack, or Table mode.  More information on how O-Calc Pro can model tensions and 
sags on conductors and cables using several different methods can be found on the O-Calc 
Pro WIKI page. See: http://o-calcpro.com/wiki/2017/05/16/tension-types-and-sag-explained/).

Error in Display Attachment Heights for Segmented Poles
O-Calc Pro can model manufactured, non-wood, segmented poles. This are typically steel 
or fiberglass poles that are manufactured in segments and then stacked in the field during 
installation. O-Calc Pro models these segmented poles as separate segments so that the amount 
of overlap can be adjusted to either the manufactures specifications and/or how the pole was 
constructed in the field. With earlier build of O-Calc Pro Version 5.03, both the O-Calc 
Pro 3D View and the Schematic View displayed incorrect attachment heights when modeling these 
segmented poles. These displays were failing to properly account for the setting depth of the 
bottom most segment. It should be emphasized that defect did not affect the calculations, only 
how the model was being displayed.



O-Calc Pro 5.03 is available in both manual and installer based versions.

Depending on your environment you may wish to use the installer or to
manually install the files.

For those using the installer it is highly recommended that you first do
the following:

  1) Uninstall your current version.
  2) Manually navigate to "C:\Program Files (x86)\Osmose\O-Calc Pro".
  3) Delete the "bin" folder there.

This prevents problems caused by certain aggressive Anti-Virus programs that
incorrectly prevent the removal of selected components form older versions that
prevent proper operation of O-Calc Pro

For those wishing to install O-Calc Pro 5.03 manually you may use the .ZIP
version and replace your existing "C:\Program Files (x86)\Osmose\O-Calc Pro\Bin" 
folder with the "bin" folder from the .ZIP