ENCalculator is a free site exposure factors calculator for EN1991-1-4, Eurocode 1 - Wind loads and the UK National Annex.

This version of the EN1991-1-4 site exposure calculator (2.0) implements the rules in the current UK National Annex. There are differences from the previous version (1.0) which implemented Draft for Public Comment of the UK NA.

Disclaimer

These documents and program are Copyright (c) 2007 RWDI Anemos Limited. No warranty is given or implied. You are welcome to distribute them freely in their entirety but they are not for resale. The documents, charts and program must be used in conjunction with a current copy of EN1991-1-4 and the UK National Annex. Values from the Code shall always take precedence. Reasonable care has been taken to ensure that these documents are free of viruses, however you are advised to make your own checks before installation.

Instructions

Download the zip file and then uncompress or extract the ENCalculator2.zip file and place in an appropriate location on your computer. Create a shortcut on your desktop for easy access (right click on the ENC20.exe file, select "Send to" and then "Desktop as shortcut").

Use the text boxes or sliders to set the correct values for effective height, distance to sea and distance in town. The program will not allow invalid combinations - for example, being one kilometre for the sea but 2km inside town. Also, note that the sliders for distance have a lower limit of 0.1km because of the logarithmic scale). If you want to set 0km, just use the minimum 0.1km setting.

Download: ENCalculator Program (ZIP 280KB), or Encalculator Program (EXE, 580KB)