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No need for seam welding of plates.
Steel plates of varying thickness.

LP(Longitudinally Profiled) steel plate is plate with a thickness that varies in the longitudinal direction. It is manufactured to order, so the plate thickness can be varied in accordance with the stresses applied to the particular structure.
There is no need for the seam welding required with conventional steel plate, so in addition to saving on labor, structures can also be made lighter.