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If located more than 30 inches above grade porches, balconies, or raised floor surfaces a 36 inch guardrail is required with spindles space not more than 4 inches apart.
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Stair requirements are width not less than 36 inches.
Maximum riser height 8 1/4 inches, maximum tread depth 9 inches.
Headroom height for doors is 6 feet 8 inches.
Handrail heights are minimum 34 inches and maximum 38 inches.
In accordance with 2013 Residential Code of Ohio and 2017 Ohio Building Code