The user interface is erroneously printing the numerical value for VNY in place of U1Z. This has been logged in our defect logging system with id# 535826 and will be addressed in the next release.
The U1Y and U1Z are the factors used in the interaction equations of section 13.8.2 of the S16 code
A number of fixes has been made to the Canadian code since 20.07.11.33 and you can find details on all of these fixes in a document which is available within the installation folder
C:\SProV8i SS6\ReadMe\readme_STAADPro.htm
Once you open the document, click on the Revision History hyperlink on the left and you will find details of these fixes under each release. Watch out for the ones that relate to the Canadian code S16. In case it helps, standard Windows search can be activated within the html by pressing CTRL+F
