dimensions suggested are the most generally used, however, other solutions are possible by dealing with multiples of 20 and 93.5 (measure of gross staircase, without customization)
Height of the slope
Difference in heigh length
Number of landings
1 > Choose the width of your stairs A.
2 > With a level, measure the distance between the highest and the lowest points of the slope B.
3 > Measure the terrain drop-off C (height) or the length of the slope D.
4 > Clic on « Calculate».
Choose the number of landings suggested (if applicable) and clic on « calculate »