The width of the Pultruded Stair Tread is the space in the front fringe of the integral nosing to outdoors fringe of the last bearing bar. All item widths are calculated from front to again. This measurement is sometimes called depth. The length (span) of the Stair Tread is calculated https://rafaeldnubc.theobloggers.com/23109604/rumored-buzz-on-amstep-products-retrofit-stair-nosing