PURPOSE: To drain raindrops entering constant pressure space, and improve the watertightness of the intersecting section of curtain wall units. ;CONSTITUTION: A catch pan 40 laid between the seal materials 25 and 26 for the rain and wind barriers of the head 7 of a curtain wall unit 1, and a flashing 41 laid at the exterior side of the seal member 25 are arranged so as to cover the heads 7 of units 1 adjacent to each other right and left. Thus, raindrops entering space between jambs 5 and 6 are caught by the catch pan 40, and drained outside via a fresh air introduction hole 34. According to this construction, a seal material for the intersecting section of the units 1 is concealed with the catch pan 40 and the flashing 41, and the ingress of raindrops is prevented. As a result, the watertightness of the intersecting section can be improved.;COPYRIGHT: (C)1995,JPO
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