Abstract: This document discusses, among other things, unitized curtain systems and methods related to the fabrication and installation of curtainwalls. A curtainwall unit may comprises a frame including a horizontal gutter, a horizontal sill, a first vertical mullion between a first end of the horizontal gutter and a second end of the horizontal sill, and a second vertical mullion between a second end of the horizontal gutter and a second end of the horizontal sill. The horizontal gutter may include a rear channel extending across the horizontal gutter, and at least one protected horizontal channel at least partially beneath the rear channel, the rear channel having at least one opening to the at least one horizontal gutter. Each vertical mullion may include a protected vertical chamber having an opening to the at least one protected horizontal channel.

Abstract: An anchoring system for anchoring curtainwall units may include an anchor base structure to be attached to the floor slab, a vertical anchor structure and a horizontal anchor structure. The vertical anchor structure may be connected to a lower portion of the upper row curtainwall unit and bear a load of the upper row curtainwall unit on the anchor base structure, thereby fixing a distance between the floor slab and the lower portion of the upper row curtainwall unit while allowing horizontal motion. The horizontal anchor structure may be configured to be connected to an upper portion of the lower row curtainwall unit, and to use the anchor base structure to secure the upper portion of the lower row curtainwall unit against horizontal motion while allowing vertical motion.

Abstract: This document discusses, among other things, unitized curtain systems and methods related to the fabrication and installation of curtainwalls. A curtainwall unit may comprises a frame including a horizontal gutter, a horizontal sill, a first vertical mullion between a first end of the horizontal gutter and a second end of the horizontal sill, and a second vertical mullion between a second end of the horizontal gutter and a second end of the horizontal sill. The horizontal gutter may include a rear channel extending across the horizontal gutter, and at least one protected horizontal channel at least partially beneath the rear channel, the rear channel having at least one opening to the at least one horizontal gutter. Each vertical mullion may include a protected vertical chamber having an opening to the at least one protected horizontal channel.