Search results
The rafter square and framing square save time on roof construction. All necessary cuts for a particular rafter can be laid out with these two squares. A basic knowledge of rafters helps determine what scale and what number on the tool to use.
Use our rafter length calculator to see how long your rafters need to be when framing a roof or truss. Plus, learn the rafter length formula.
Calculate the length of common rafters with this free and easy online tool. Results include the rafter length, run, rise and the height of the scaffold.
Calculate all rafter dimensions and cut angles to frame a roof - Metric.
Rafter Span Tables - Use these tables to determine lengths, sizes, and spacing of rafters based on several factors such as species, load, grade, and spacing. Visit the roof framing page for more information on cutting roof rafters, and visit the roof pitch calculator for determining rafter lengths based on rise and run.
The roof pitch calculator calculates rise, run, slope, pitch, angle, and rafter length. Use the diagrams on this page when referring to the Input section and to interpret the calculated Results. The roof pitch calculator calculates the following common rafter-building scenarios: Pitch(X) - (based on Rise and Run) Rise(M) - (based on Pitch and Run)
We are now ready to layout each type of rafter. COMMON RAFTERS WITH RAFTER SQUARE Common Rafter Length: Once Inch Rise and run are calculated, use the tables in the back of this book to find common rafter length. Example: Use 6 Inch Rise table, read common rafter length adjacent to 11’ run. Our
