Patent ID: 6912820
Filing Date: 2005-07-05
Classification: E04B

Abstract:
1. A drainage system for use in concrete masonry unit (CMU) wall construction, comprising: a tray unit of a size corresponding to one or more CMU, to be received beneath a course of CMUs, in use, the tray unit including opposite side flanges to abut a superjacent CMU and supporting a pan therebelow; a strip of water permeable material attached to an upper surface of the pan and extending transversely beyond a front edge of the pan; and a block of water permeable material, the block being T shaped having a top part wider than a CMU core and a bottom part narrower than the hollow CMU core and being positioned above the pan and extending upwardly into a hollow core of the CMU, in use, the water permeable material of the strip and the block having a porosity sufficient to permit water to pass therethrough but substantially insufficient to permit mortar and debris to pass therethrough so that water in the hollow core of the CMU drains through the strip.