To use the Truss Form Existing Roof Dimension Calculator:
- Enter your existing heel size OR rafter size
- Enter two of the Span/Height/Pitch fields. The tool will calculate the missing field.
- Between calculations, click the field to clear or use the reset button to clear all fields
*This tool assumes roof with a central ridge position. This tool is intended a guide only. All measurements should be double checked by an experienced designer.