Building facade system and method of providing a building facade

A building facade system comprising:

• a panel assembly comprising a panel frame and an infill panel, the panel frame being comprised of vertical mullions and horizontal supports coupled thereto and framing the infill panel, the infill panel being supported on the panel frame;
• a unified anchor assembly comprising an anchor member comprising:
• a blade portion having a proximal end with a head, an opposing distal end and a lateral surface having serrations along at least a portion of a length of the blade portion between the proximal and distal ends, the length of the blade portion extending in a first direction, a slotted opening extending along at least a portion of the length of the blade portion in the first direction, the slotted opening extending through the blade portion between the lateral surface having the serrations and an opposing surface of the blade portion, the serrations on the lateral surface of the blade portion having a series of alternating elongated ridges and grooves extending in a second direction substantially perpendicular to the first direction;
• an anchor first having a channel and a flange, the channel being configured to receive the head of the blade portion, the head being configured to slidably engage within the channel in the second direction, and
• an anchor fork having a pair of tines defining a slot with an opening therebetween, the anchor fork having a serrated lateral surface along at least a portion thereof, the serrated lateral surface of the anchor fork having a series of alternating elongated ridges and grooves extending in the second direction, the serrated lateral surface of the anchor fork being configured to engage the serrations of the blade portion, the anchor fork and the blade anchor being a two-part assembly secured together by a fastener extending in a third direction substantially perpendicular to the first and second directions;
• wherein
• upon installation onto a building, the anchor fork being oriented so that the opening of the slot of the anchor fork is downward-facing, the anchor fork being seated on an upwardly extending flange of a structural member affixed to a building floor slab proximate a terminal edge of the building floor slab, the flange of the structural member extending into the slot of the anchor fork, the blade portion extending in the first direction which is a substantially lateral direction, the channel of anchor first extending in the second direction which is a substantially vertical direction, the anchor first being secured to at least one of the vertical mullions by shear connection, the shear connection being made by fasteners coupling the flange of the anchor first to a lateral surface of the at least one vertical mullion.

A method of providing a building facade system comprising:

• providing a unified anchor assembly having an anchor member comprising a blade portion, an anchor first and an anchor fork, the blade portion having a proximal end with a head, an opposing distal end and a lateral surface having serrations along at least a portion of a length of the blade portion between the proximal and distal ends, the length of the blade portion extending in a first direction, a slotted opening extending along at least a portion of the length of the blade portion in the first direction, the slotted opening extending through the blade portion between the lateral surface having the serrations and an opposing surface of the blade portion, the serrations on the lateral surface of the blade portion having a series of alternating elongated ridges and grooves extending in a second direction substantially perpendicular to the first direction, the anchor first having a channel and a flange, the channel being configured to receive the head of the blade portion, the head being configured to slidably engage within the channel in the second direction, the anchor fork having a pair of tines defining a slot with an opening therebetween, the anchor fork having a serrated lateral surface along at least a portion thereof, the serrated lateral surface of the anchor fork having a series of alternating elongated ridges and grooves extending in the second direction, the serrated lateral surface of the anchor fork being configured to engage the serrations of the blade portion, the anchor fork and the blade anchor being a two-part assembly secured together by a fastener extending in a third direction substantially perpendicular to the first and second directions;
• securing the blade portion within the channel of the anchor first and securing the anchor fork to the body of the blade portion by a threaded fastener extending through the slotted opening of the blade portion and into the anchor fork;
• orienting the anchor fork such that tines extend downward below the blade portion with the opening therebetween opening downward;
• forming a panel assembly by coupling the anchor member to a vertical mullion, coupling the vertical mullion to at least one horizontal support member to form a frame assembly and structurally glazing a building panel to the frame assembly, the coupling of the anchor member to the vertical mullion being a shear connection whereby the flange of the anchor first can be oriented flush against the side surface of the vertical mullion and a fastener can be inserted through an opening in the flange and into the mullion;
• securing a structural member to a top surface of the building floor slab proximate the terminal edge, and
• securing the panel assembly to the building by seating the anchor fork of the anchor member on an upwardly extending flange of the structural member.