There is no drawings of old construction. Laser measured data are used to reconstruct each beam.
[Insufficient measured points]
[Detect Cross-section Lines in Points]
[Reconstruction of the Model with Cross-section Lines]
The first is a image of measured insufficient points. Beams are assembled each other and one beam is insufficiently detected.
Presume cross-section lines where small number of or no measured points area.
Beam shape is generated with cross-section lines.