A latch assembly connected to the drive unit of a bi-fold door for retaining the bi-fold door secure to a building has elongated straps attached to rotatable latch drums mounted on the outer ends of the drive shaft of the drive unit. Lift drums powered by a motor driven gearbox raise and lower the bi-fold door. Latch assemblies having springs attached to the straps maintain tension on the straps during the opening and closing of the bi-fold door.

An earthquake resisting door has locking mechanisms between the door panel top, sides, and the bottom foundation. Included are self-contained limited uplift resisting end posts, one or more door panels made of wood, steel, or other suitable material that can act as a shear wall or brace frame, and segmented door panels that can be designed for roll-up or folding. The segments interlock to create one solid wall or arrangement of segments that creates brace frame action. An inter-locking mechanism engages adjacent door leaves in a casement arrangement and creates one panel.

A latch assembly connected to the drive unit of a bi-fold door retains the bi-fold door in engagement with upright columns of a building with elongated straps attached to the upright columns and rotatable latch drums mounted on a drive shaft of a drive unit. Lift devices powered by the drive unit raise and lower the bi-fold door. Latch assemblies include springs that maintain tension on the straps during the opening and closing of the bi-fold door.

A folding wall partition includes foldable panel assemblies. Each panel assembly includes an upper panel and a lower panel. The upper and lower panels extend substantially in a common vertical plane when in a deployed position, and extend laterally outwardly of the common vertical plane in a stacked relationship when in a stored position. A moving mechanism engages the panel assemblies to displace them between the stored and deployed positions. A cover assembly has cover panels. The cover panels extend in a first common horizontal plane when in the deployed position and are substantially coplanar with the ceiling to conceal a cavity. The cover panels extend in a second common horizontal plane higher than the first common horizontal plane and within the cavity when the cover panels are in the stored position.

An earthquake resisting door has locking mechanisms between the door panel top, sides, and the bottom foundation. Included are self-contained limited uplift resisting end posts, one or more door panels made of wood, steel, or other suitable material that can act as a shear wall or brace frame, and segmented door panels that can be designed for roll-up or folding. The segments interlock to create one solid wall or arrangement of segments that creates brace frame action. An inter-locking mechanism engages adjacent door leaves in a casement arrangement and creates one panel.

A vertical door system includes: a door having a door frame, the door frame having at least one frame section; an operator; two vertical supports configured to: (a) be installable on opposite sides of the door opening and (b) support the vertical door, at least one of the vertical supports having: a guide track on a surface of the vertical support facing toward the door opening; and a drive system having: an elongated threaded rod drivable by the operator via a gearing arranged between the operator and the threaded rod; and one or more blocks, each block comprising a guide track connecting portion that connects to a guide track so the connected block is freely movable along the guide track, each block having a through-bore for accepting the threaded rod so that the block is positioned on the threaded rod and is movable along the threaded rod.

An articulated door system includes one or more door sections; a lifting block associated with a lower door section of the one or more door sections; a frame supporting the one or more door sections and engaging the lifting block; and a lead screw system including a rotatable lead screw that is configured to engage the lifting block and lift the lower door section up and down based on rotation of the lead screw.

A frame assembly supporting an overhead door has a horizontal header connected to upright columns or posts with splice assemblies. Fasteners mounted on the columns cooperate with retainers on the splice assemblies to position and connect the columns to the header. Hinge assemblies pivotally mount the door on the header for movement between open and closed positions.

A frame assembly supporting an overhead door has a horizontal header connected to upright columns or posts with splice assemblies. Fasteners mounted on the columns cooperate with retainers on the splice assemblies to position and connect the columns to the header. Hinge assemblies pivotally mount the door on the header for movement between open and closed positions.

A bi-fold door is opened with a lift assembly having a plurality of straps attached to power driven lift drums. A latch assembly retains the closed bi-fold door secure to side columns of a building. The latch assembly has a latch strap attached to a latch drum that accommodates the latch strap to hold the closed bi-fold door in contact with the side columns of the building. A floor anchor assembly anchors the bottom of the closed bi-fold door to the floor below the closed bi-fold door to stabilize and inhibit bending and deformation of the bi-fold door frame.