Bridge moving load

Use joints, sections, geometric rules, rank checks, and moving-load envelopes for determinate trusses.

Interactive engineering simulation

Move a joint load across the deck and calculate every envelope case using the same displayed truss height.

Height-consistent envelope

Member	Envelope \|F\|	Governing load position	State
BD	106.667 kN	C	compression
AB	66.667 kN	C	compression
BC	66.667 kN	C	tension
CD	66.667 kN	C	tension
DE	66.667 kN	C	compression
AC	53.333 kN	C	tension
CE	53.333 kN	C	tension

Joint load80 kN

10–200

Drag for exploration or enter an exact value. Press Enter to apply; Escape restores the current value.

Truss height3.00 m

1.50–6.00

Drag for exploration or enter an exact value. Press Enter to apply; Escape restores the current value.

Classification

determinate

Maximum joint residual

1.42e-14

Governing envelope

BD: 106.667 kN at C

Model scope and verification

Use the displayed units and idealizations, then verify the governing balance or compatibility equation before interpreting the result.

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