Patent ID: 6155013
Filing Date: 2000-12-05
Classification: E04F

Abstract:
A floorboard for clean rooms, comprising:support unit (110) consisting of:a plate part (111) provided with a plurality of engaging holes (114) on its upper surface;a support part (112) vertically and integrally formed along an edge of a lower surface of said plate part; anda plurality of reinforcing ribs (113) linearly, regularly and integrally extending on the lower surface of said plate part in a way such that the ribs are integrated with both the plate part and the support part;a tile unit (120) integrated with the upper surface of the plate part of the support unit, said tile unit consisting of:a cover part (121) engaging with the upper surface of said plate part; anda plurality of engaging projections (122) formed on a lower surface of said cover part at positions corresponding to the engaging holes (114) of the support unit (110), thus engaging with the engaging holes of said support unit, each of said engaging projections having a ventilation hole (123) at its central portion.