Dryer Duct Inspections

Do you know of an illustration showing a dryer duct and termination through the roof, and inspection guides for dryer duct inspection?

No illustration but this info may help http://www.nachi.org/dryer-vent-safety.htm

This may be of some help http://www.whirlpool.com/digitalassets/WED7500VW/Ventilation%20Specification_EN.pdf