© 2022 Johnson Level & Tool — 6
GETTING STARTED
STAIR LAYOUT KEY
Stair Key: Given Rise and/or Run and
entered/ stored variables, calculates
or displays:
PRESS RESULT
1 Riser Height
2 Number of Risers
3 Riser Overage/ Underage
4 Tread Width
5 Number of Treads
6 Tread Overage/ Underage
7 Stringer Length
8 Angle of Incline
9 Stored Run
10 Stored Rise
11 Stored Desired Riser Height
12 Stored Desired Tread Width
STAIR DEFAULT VALUES
• 7-1/2" Desired Riser Height
• 10" Desired Tread Width
Stair
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