Water collection pan for unit masonry wall systems and drainage system incorporating same

A water drainage system for a masonry block wall having at least one upper block course, a lower block course, and a bed joint separating the blocks in the lower block course from the upper block course, wherein the upper course includes at least one block having at least one hollow core, the water drainage system comprising:

• a plurality of water collection pans for positioning on the top surface of each of the blocks of the lower course across the entire length of the lower course for collecting water drained through each core of the upper courses and for directing the water to the exterior of the block wall, wherein at least one of the collection pans includes,
• substantially planar collector surface for positioning on the top surface of one of the blocks in the lower block course such that, when the collection pan is positioned on the top surface of a block in the lower block course, the collector surface extends across substantially the entire width of the block, the collector surface including front, rear and side edges,
• each of the front, rear, and side edges including a ridge extending generally vertically from the edge to aid in providing a barrier which directs water towards the collector surface of the pan, and
• a drainage channel extending from the collector surface such that, when the collection pan is positioned on the top surface of a block in the lower block course, the drainage channel extends toward the front wall of the block across the bed joint for draining water to the exterior of the block wall.

A water collection pan for use in a masonry block wall having at least one upper block course and a lower block course, wherein each upper block course includes at least one block having at least one hollow vertical core, and wherein the lower block course includes a bed joint of mortar separating the blocks in the lower block course from the adjacent upper block course, the collection pan comprising:

• a substantially planar collector surface for positioning on the top surface of a block in the lower block surface such that, when the collection pan is positioned on the top surface of a block in the lower block course, the collector surface extends across substantially the entire width of the block, the collector surface including front, rear and side edges;
• each of the front, rear and side edges including a ridge extending generally vertically from the edge to a height of slightly less than the thickness of the bed joint to aid in providing a barrier which directs water towards the collector surface of the pan;
• and
• a drainage channel including a ceiling portion spaced above, and generally parallel to, the collector surface and extending into the pan from the front edge of the pan, and a weep spout extending forward from the front edge of the collector surface such that, when the collection pan is positioned on the top surface of a block in the lower block course, the weep spout extends across the bed joint on the top surface of the block, the weep spout including a generally concave sidewall, and a lower drip edge which extends outward from the opening of the weep spout at an angle of about 45° from horizontal to direct moisture collected on the collector surface of the pans to the exterior of the wall system.