B) 36 Inches

C) 48 Inches

D) 60 Inches
E) 72 Inches

Answer:

D) 60 inches

? = 60 inches

2015 IRC

Glazing adjacent to the landing at the bottom of a stairway where the glazing is less than 36 inches (914 mm) above the landing and within a 60-inch (1524 mm) horizontal arc less than 180 degrees from the bottom tread nosing shall be considered to be a hazardous location.

Exception: The glazing is protected by a guard complying with Section R312 and the plane of the glass is more than 18 inches (457 mm) from the guard.




Information on Safety Glazing
https://mybuildingpermit.com/sites/default/files/documentation/Tip%20Sheet%2019%20Safety%20Glazing.pdf

If you find any errors or have additional information that would expand on any code, building standards or manufacturer requirements please let me know.

NCW Home Inspections, LLC  is a Licensed Washington State Home Inspection service located in Wenatchee Washington serving Chelan County, Douglas County, Kittitas County, Okanogan County and Grant County Washington and the cities of Wenatchee, Leavenworth, Cashmere, Oroville, Cle Elum, East Wenatchee, Quincy and many more…  

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Safety glass, Window hazard zone, Wenatchee Home Inspection