| 摘要 |
PURPOSE: A grating is provided to improve productivity by manufacturing the grating without a welding work and to form multiple drain holes through a burring process. CONSTITUTION: A grating(100) comprises a top plate(110), a pair of first side plates(120), a pair of second side plates(130), and reinforcement ribs. The top plate has multiple drain holes(112), anti-slip protrusions(118), and flanges. The first and second side plates are integrally bent from the top plate. The reinforcement ribs are formed on the bottom of the top plate and support the top plate. [Reference numerals] (AA) Transversal direction; (BB) Longitudinal direction |
