How this calculator works
Estimate basic chord lengths for a symmetric triangular roof truss.
top chord = √[(span/2)² + rise²]
Roofing · Calculator
Estimate basic chord lengths for a symmetric triangular roof truss.
Estimate basic chord lengths for a symmetric triangular roof truss.
The calculator uses the following core relationship:
Design note: This tool is intended for preliminary engineering checks, not final structural design or code compliance.
A roof truss calculator provides preliminary truss dimensions based on span and roof pitch.
Structural verification is required before construction.
Engineering note: Use these calculations for estimation and planning. Always confirm final designs according to project requirements and applicable standards.
Estimate basic chord lengths for a symmetric triangular roof truss.
The calculator uses inputs such as Truss span (m), Truss rise (m), and Number of trusses (pcs). Use values from your drawings, measurements, product data, or project specifications.
Use outputs such as Top chord each side, Bottom chord, Chord length per truss, and Total chord length for preliminary checking and comparison only. Final structural design, member selection, detailing, and code compliance should be verified by a qualified engineer using the applicable standards.
Continue your estimate with related Construction Calc Lab.