With all due respect Gary, I don't forsee an inspector ever checking the steps UNLESS they're considered a main egress to the home. If you want another example, look at the step height max. for egress windows wells, 18"........
I agree. as far as where to locate the exterior codes Im not 100% sure where to locate those but i do have this link for the interior codes. a visual interpretation we use here all the time.
My code post is just showing the maximum slope allowed that has been field-tested and found to be best. Use it or not, it's out there, better than hear-say... nice to have in case of a law-suit for tripping.
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WELCOME to the forums, if I forgot to say it!