| 摘要 |
A wall system, head joint drainage device and method adapted to allow draina ge of moisture from a head joint of a structure meeting a horizontal interruption when the wall system is formed with a plurality of building products set with mortar formi ng a mortar joint between adjacent ones of the plurality of modular building products. A space r has a top portion, having a length approximately equal to a depth of the plurality of building products and a width approximately equal to a width of the mortar joint, adapted to block the mortar from reaching the horizontal interruption and has a side portion adapted to keep the portion a distance away from the horizontal interruption, the distance allowing moistu re drainage from the head joint.
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