TinnerFlow™2nd YearField ModsGREEN · Learn / Reference
For a standard full-radius commercial elbow, the standard throat radius typically matches half the width of the turning duct dimension (R = \frac{W}{2}), unless high-velocity performance parameters require a full 1.5 \times D radius turn.
For a standard full-radius commercial elbow, the standard throat radius typically matches half the width of the turning duct dimension (R = \frac{W}{2}), unless high-velocity performance parameters require a full 1.5 \times D radius turn.
Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.