*Note: Based on inputs, Side 1 and Side 2 have different vertical rises. Assuming stepped eave
elevations. Geometry driven by Side 1 Rise.
Trim & Cut Angles
Trim Plate Break (Bend from Flat)0.0°(Inside:
0.0°)
Plan Angle (from Side 1)0.0°
Member Level Cut0.0°
Member Plumb Cut0.0°
PEMB Compound Geometry Guide
Independent Sides & Stepped Eaves
In Pre-Engineered Metal Buildings (PEMB), a valley often occurs between two building lines with different
eave heights (e.g., a main building and a lower lean-to). This calculator allows you to input independent
Plan Runs for both sides.
Note: The vertical "Rise" of the valley line is calculated based on the Side 1 (Main
Roof) inputs. If Side 2's theoretical rise differs, the tool assumes the eaves are at different
elevations.
The Trim Break Angle (Dihedral Angle)
The "Break Angle" provided by this tool is the angle of bend required on a standard flat sheet of steel to
perfectly nest into the valley or cap the hip.
Bend Angle (From Flat): This is how many degrees the brake press needs to fold the
metal. A flat sheet is 0° of bend (180° straight).
Inside Angle: This is the resulting inside measurement of the bent plate. A 60° bend
results in a 120° inside angle.