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.

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.

Methods and apparatus to wirelessly interlock doors are disclosed. A door system includes a user interface to receive interlock configuration data input from a user, the interlock configuration data to define an interlock condition to be satisfied before a first door is to undergo an operation, the interlock condition associated with a current state of a second door. The door system includes a first wireless transceiver to receive a signal from a second wireless transceiver associated with a second door. The method includes a door operation controller to at least one of (1) implement the operation of the first door in response to a request when the current state of the second door satisfies the interlock condition, (2) ignore the request, or (3) not execute the operation of the first door in response to the request when the current state of the second door does not satisfy the interlock condition.

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 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. Hinges pivotally mount the door on the header for movement between open and closed positions. Linear actuators connected to the frame assembly and door are operable to move the door between door open and door closed positions.

Methods and apparatus to wirelessly interlock doors are disclosed. A door system includes a user interface to receive interlock configuration data input from a user, the interlock configuration data to define an interlock condition to be satisfied before a first door is to undergo an operation, the interlock condition associated with a current state of a second door. The door system includes a first wireless transceiver to receive a signal from a second wireless transceiver associated with a second door. The method includes a door operation controller to at least one of (1) implement the operation of the first door in response to a request when the current state of the second door satisfies the interlock condition, (2) ignore the request, or (3) not execute the operation of the first door in response to the request when the current state of the second door does not satisfy the interlock condition.

In order to enable higher operational and manipulation security in the radio remote control of building or enclosure closures by simple means, the invention provides a method for remote control of an automatic building or enclosure closure (12.1, 12.2, 12.3), comprising: a) transmitting actuation signals (32.1-32.3) with authorization data by means of a transmitter (14) by radio, b) receiving the actuation signals (32.1, 32.2, 32.3) by a receiver, c) determining the authorization on the basis of the received data, and d) controlling the building or enclosure closure (12.1, 12.2, 12.3) to perform the action when authorization is available; wherein in step a) a first actuation signal (32.1) is repeatedly transmitted alternately on a first frequency using a first modulation and a second actuation signal (32.2) is transmitted on a second frequency using a second modulation, and in step b) radio signals are first received on the first frequency using the first modulation over a time longer than the transmission of the first actuation signal and then radio signals are received on the second frequency using the second modulation over a time longer than the transmission of the second actuation signal.

A tilt-up door having vertical side members each having a pivot point, the pivot points move upward or downward when an actuator is activated to move the door between open and closed positions. First and second cams connected to the vertical side members at a lower end of the cams, each of said cams extend from the lower end thereof upwardly and arcuately toward an interior of a building to a distal terminal end thereof, each of the ends contacts a cam follower. The cam followers slide along the first and second cams and guide the first and second cams and the door as the door moves between the 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.