Calculated estimate14
risers
Equal riser count
Finished floor-to-floor rise108 in
Actual riser height7.714 in
Tread count13
Entered tread run10 in
Total horizontal run130 in
Straight slope span169 in at 39.7°
Approximate tread surface32.5 sq ft
Preliminary geometry only. Do not cut stringers from slope span; real stringers require material, bearing, landing, nosing, connection, and code details.