1. the werd is staers, not staerkase
2. yu better put raels around the sides
3. ???? yu hav a hole with radius=2 meters, & nael the steps tu the wall av hole ???
Me thank sumthun like this require speshalist hu dun it B4
normal for steps is rise =bout 7 inch & run bout 9inch
But serkel result in run vary...more neer outside wall, small neer senter.
normal staers...get vetikal hite in inches, sae 9ft up tu floor 2...9*12=108 inches
divide 108 bi 7 tu get 15.428571 steps
round up tu 16 steps, so eech step=108/16=6.75 inch or 6 & 3/4 inch
me spekt speshalist hav a vershun for serkel staers