Hi, Mark
Not sure if you still need help with this. If so, you can probably try Microsoft's website or do an online search for PowerPoint construction phase templates.
Here are a few links that may help. Not sure if they're exactly what you are looking for. I believe the templates are all free. I haven't downloaded them personally, so I don't know if they're virus free.
http://office.microsoft.com/en-us/te...010238340.aspx
http://www.pptsearch.net/tag/construction-phase-health-and-safety-plan [here, you can select a PowerPoint title and click Download on the next page]
http://www.presentationfx.com/construction.html
Hope you find what you need.