Abstract: Methods, systems, and devices for securing a door including a security assembly comprising at least one frame member with a slot. The security assembly may include a blade at least partially received in the slot and an actuator within the cavity. The blade may substantially traverse the length of the edge surface of the door in the closed position and be extendable from the slot toward the edge surface. The actuator may be configured to move the blade between a retracted position and an extended position. The security assembly includes an endcap configured to cover a corresponding edge surface of the door and including an opposing well slot configured to at least partially receive the blade when the blade is in the extended position, and thereby prevent movement of the door.

Abstract: This invention relates to a sill for a door frame, whether a door is hinged, sliding, or bi-fold or otherwise, comprising or including a stationary sill member, whether of unitary or composite construction, a movable sill member with a surface thereon to act as a threshold (hereafter ‘threshold surface’) for said sill, and at least one moving means, wherein said at least one moving means acts on said movable sill member, directly or indirectly to move said movable sill member between, a first position wherein said threshold surface is retracted at least in part toward or within said stationary sill member, and a second position wherein said threshold surface is extended from said stationary sill member, said at least one moving means energised by a controlling event. The invention also relates to a method of providing and installing a sill for a door frame.