Visio has all the tools needed to work this out quickly.

Firstly, create a new document and choose US metrics
Then open the Page Setup dialog via Design > Page Setup Dialog Launcher (little icon in bottom right of the first group on the Ribbon)
In the Page Setup dialog:
3. Print Setup Paper size should be C Sheet: 17 in x 22 in
4. Page size should be Custom size to match the 17x22
5&6. Drawing Scale should be Custom scale around 1 in = 12 ft

You can see the scaled size of the page while adjusting the custom scale. Choose a scale to allow the page size to be greater than the page size because you will need a border around the objects you place on the page because printers won't print right to the edge of the paper.

Attached Images

VisioScaling.png (78.5 KB, 17 views)

__________________
Andrew Lockton
Chrysalis Design, Melbourne Australia