Lab / Structural Analysis

Influence Line

Draw and verify ILs for reaction, shear and moment — quiz yourself or build any determinate beam and generate the exact diagram.

Learn what ILs are →

Task: Draw the I.L. for reaction at roller B at 10 m. 10 m beam — pin A at 2 m, roller B at 10 m.

AB0L=10m
-1-0.75-0.5-0.2500.250.50.7511.250A (2m)c (6m)B (L)0AcB (L)I.L. for Rᴮ — Reaction at B

Drag the handles up / down to set your influence-line values, then check your answer.