An arched-wall layout combines a circular segment with on-center stud spacing. Heights are measured above the chord and mirrored about the center. Add any base-wall height separately when transferring the layout.
Read the arched-wall cycle
Use wall width as the chord, center rise and on-center stud spacing. Stud heights are available when center rise is no more than half the width.
Start a new calculation
Use 2nd if a unit is above its button.
Start fresh
Press Clear entry, then Clear entry.C→CPress the keys
Press Select length units.Length
Open Circle
Skip if this mode is already open. Skip Close if no mode is open.
- Press Close calculation mode, then Open Circle.Close→Circle
1. Enter measurements and calculate
Stud spacing
Press 16, then inches, then Store spacing.16→Inch→SpacingWall width
Press 15, then feet, then Store chord.15→Feet→ChordCenter rise
Press 5, then feet, then Store rise.5→Feet→RiseCalculate radius
Press Equals.=
- Example · Radius8 feet 1 and 1/2 inches
2. Read the stud heights
Heights start one spacing from center. No intermediate studs means none fit at this spacing.
Results in orderPress = to continue
- Example · First stud height4 feet 10 and 11/16 inches
- Remaining stud heights
- Whole-circle values
- Arc geometry
- First stud again
Diameter follows the last stud. Each height applies on both sides of center.
Use = to select Stud height 1 or Diameter.
Keep in mind
Heights are above the chord. Add any base-wall height separately. Each height applies on both sides of center. Circle spacing belongs to this setup.
Display assumptions
Fraction precision: 1/16″; Fraction format: Simplified; Area units: Automatic; Angle decimal places: Variable. ↩
Keep the guide beside your calculation.
These examples are built into Figure. Open Help while you calculate, then return to the same guide and reading position.
See Help in Figure →