Inclined Square to Round flat pattern

What it is

The square-to-round transition with the circular opening offset and tilted relative to the base. It keeps the triangulated construction of the concentric transition, but with no symmetry to simplify it: every strip is solved individually.

Where it is used

Connections between equipment and misaligned pipework, hoods with a side outlet, adaptations in existing installations where the duct cannot be moved.

Measurements the calculation needs

• H Height
• D Diameter
• X Measurement X
• ANG Angle
• DV Divisions
• THK Thickness

Worked example

The values the form comes pre-filled with, run through the tool itself:

Height	1000 mm
Diameter	800 mm
Measurement X	1400 mm
Angle	30 mm
Divisions	16 mm
Thickness	3 mm
The flat pattern fits a plate of	3550 × 2016 mm

Frequently asked questions

When do I need this instead of rectangle to round?

Whenever the round opening is not centred and square to the base. If it is, the concentric transition is simpler and easier to form.

What is the angle measured against?

The perpendicular to the base: zero returns the opening square, and larger values tilt the round progressively.