Observe: X will be the twelve in minimum handrail extension needed at Each individual major riser. Y could be the minimum handrail extension of 12 in moreover the width of 1 tread that is required at Every single bottom riser. However, if created in accordance with ANSI A17.1-1978, the https://remingtonlwfpz.techionblog.com/23904653/considerations-to-know-about-ufars