âI think whatâs changed a bit over the years is â over time, the concentration of the active ingredient, THC, has increased dramatically in the marijuana that is available for people to smoke,â Ball said in a video.
Exterior residential entrance steps are usually about 7 inches high, so a porch with more than 2 steps would be about 21 inches high. Most building codes require a 36 inch high guard (railing) if the change in level is 30 inches or more.
The riser height should be 8.25 inches (21cm) or lower. The nosing protrusion length should be 1.25 inches (3.2 cm) or lower to prevent tripping on the nosing. The headroom is recommended to be 6 feet and 8 inches (203 cm) or higher. The stair width is recommended to be 35 inches (89cm) or longer. The height of the handrail, measured from the nose of the tread, is recommended to be between 34 and 38 inches (86 to 97 cm). The comfortable size of handrail diameter is between 1.25 and 2.68 inches (3.2 to 6.8 cm). Doors are normally not allowed to swing over steps.