Rafter Calculator
Counts rafters along building length direction simplified as span/spacing +1.
Reviewed by MaterialNeeded Editorial Team, Editorial review for field workflows and ordering assumptions.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Cum folosesti acest calculator
Enter plan dimension along ridge and rafter spacing.
Ce calculeaza formula
Counts rafters along building length direction simplified as span/spacing +1.
Intrebari frecvente
Hip roofs?
This is a ridge-run simplification only.
Birdsmouth?
Does not change count.
Collar ties?
Separate members.
Engineering?
Follow truss or rafter tables.