This free online truss calculator is a truss design tool that generates the axial forces, reactions of completely customisable 2D truss structures or rafters. It has a wide range of applications including being used as a wood truss calculator, roof truss calculator, roof rafter calculator, scissor truss calculator or roof framing. Trusses are typically modelled in triangular shapes built up of diagonal members, vertical members and horizontal members.
How to use this Rafter Calculator?
Simply add nodes, members and supports to set up your model, apply up to 5-point loads (distributed loads can be added in full version), then click solve to run the static 2D truss analysis. It is particularly useful as a steel bridge truss design software or roof truss calculator. Click 'Reactions' or 'Axial Force' to display your results in a nice, clean and easy-to-interpret graph for your truss design. Users can also control settings such as units, display settings of truss members etc. by clicking the 'Settings' button.