Abstract: A profile for a fenestration system includes first and second members, and a thermal break extending between the first and second members. The thermal break is coupled to the first member at a thermal break interconnection that includes a tab extending laterally from a body, the tab including a head extending from the body and a stem extending from the head. A channel is defined between upper and lower flanges of the first member and provides a first chamber sized to receive the head, and a second chamber extending from the first chamber and sized to receive the stem. The head is larger than the stem, and the first chamber is larger than the second chamber. The thermal break is temporarily secured to the channel by advancing the tab into the channel, and permanently secured to the channel by crimping the flanges against the tab.

Abstract: A window wall system includes a sill receptor secured to an upper surface of a first floor slab, the sill receptor providing a base and an upright member extending from the base, a head receptor secured to a bottom surface of a second floor slab vertically offset from the first floor slab, and a glazing unit providing a sill, a head, and one or more panels extending between the sill and the head. A first hook defined by the sill is engageable with the upright member. When the upright member is received by the hook, the glazing unit is pivotable about the upright member toward a vertical orientation. A second hook is defined by the sill and receivable within a groove defined in the sill receptor when the glazing unit reaches the vertical orientation.