Manpower loading reference info for generic project such as a 2-3 Story School? any exist? Templates?

Please be reminded that activity duration is usually a function of crew composition, production rate and volume of work.  It is not enough to know crew composition only.

The following RS Means crews can do the same type of work as they share similar skills but their production rates will be quite different. Your crew selection will depend on many factors such as; equipment owned vs rental, available space, volume of work, noise considerations, crew(s) available and crew skills resource leveling among others.

Slideshare - Resource Skills

As P6 lacks the functionality to link activity duration to crew composition, production rate and volume of work you will have to figure it out how to store these values in your P6 templates.

you can just use the resource usage table and highlight the data nad press control-c and copy then go to excel and control-V and paste the data