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 height of a handrail is dependent on design needs and official requirements. Residential building codes, such as the Universal Building Code, require handrails to be between 34 and 38 inches high. Handrail height for commercial buildings, as required by the Occupational Safety and Health Administration, must fall between 30 and 37 inches.