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Enter values in decimal or imperial format, an apostrophe suffix denotes feet. Examples of valid inputs:
RO rise - the total rise of the stairs, can be used to find landing height
Rise - rise of one step
Max rise - maximum rise of each step
No. of treads - total number of treads in the stair
Run - the run of one step
Flooring tk - thickness of flooring to be installed after stringers
Tread tk - thickness of finished treads
Top riser - The distance from top of stair hole to top of stringer (forms the last riser of the stairs)
Risers - total number of risers in stairs including riser formed by top of stair hole
Stringer length - The total length of board you need to cut the stringer from
Marks - Each mark corresponds to a point of a step on the stringer with the last mark being the end of the stringer. Mark the lengths along the edge of a board. Place your angle guide (framing square etc.) on these points to mark the steps.
Stairs are calculated from finished floor to finished floor using the given flooring thicknesses. The rise (if not given) is calculated from (RO rise - btm flooring tk + top flooring tk) / Max rise. The bottom rise is adjusted to account for tread thickness and flooring thickness.
If you use the rise to calculate your stairs there will be a remainder due to rounding to account for. This is shown as (REM: ) next to the rise value. For example a REM of -1/2 means you need add 1/2 to the rises over the length of the stringer. You do not need to do this if using the generated marks.