Inspectors who wish to inspect fireplaces should know how large the hearth and hearth extensions need to be. Feel free to read our new article on hearths and hearth extensions to find some specifics about inspecting these fireplace components. Important IRC code can be found there too.
Check out my latest article on dryer vent safety. In it you will find information about appropriate vent materials, warning signs, relevant IRC code, and dryer fire frequency statistics.
I hope this is useful to you!