Bailey bridges are typically used for short spans up to 30 meters. If your bridge is longer than 30 meters, you should add a pier for structural support. To add peit just increase the number value in Abutment panel.

We can easily estimate the truss number and truss height based on the bridge length. The longer the bridge, the more trusses and height. For example, for a 24m bridge length, use truss number = 2 and truss height = 2.

Please check the curve length. The bridge length is a multiple of 3 meters. Ensure your length follows increments like 3m,12 m, 15m, 30m, 45m, etc.(Because each panel is 3 m long.)

Yes. First, this generator works only with curves. Second, with a Bezier curve in Blender, we can use the curve length as the radius input. So, the radius value is half of the bridge length.