Butted grid plate (grating): the cross bar of this type of grating is flat steel. The cross section is the same as that of the bearing flat steel. The plate is made by longitudinal and latitudinal arrangement and staggered intersection. It is beautiful in appearance and smooth on the surface. It bears bi-directional load and has strong bearing capacity, but is very heavy in dead weight. It can applied to the heavy-load ditch cover plate, rainwater grate, all kinds of walkway slab, suspended ceilings, lamp grating, isolated boards at the entrances and exits, vessel deck, sea drilling platform and industrial equipment flatform. The flat steel is 3.0～8.0mm in thickness and 30～100mm in width.