Abstract: 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.

Abstract: 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.

Abstract: A modular entrance floor system comprising a plurality of floor sections, the plurality of floor sections being disposed adjacent each other and defining a perimeter of an entrance floor area. Each floor section includes a base plate permanently coupled to a foundation, and a surface plate removably attached to the base plate. The surface plate has at least one drain feature. The plurality of floor sections are configured such that the surface plate of a first floor section is interchangeable with the surface plate of a second floor section, independent of the adjacent floor sections.

Abstract: A modular entrance floor system comprising a plurality of floor sections, the plurality of floor sections being disposed adjacent each other and defining a perimeter of an entrance floor area. Each floor section includes a base plate permanently coupled to a foundation, and a surface plate removably attached to the base plate. The surface plate has at least one drain feature. The plurality of floor sections are configured such that the surface plate of a first floor section is interchangeable with the surface plate of a second floor section, independent of the adjacent floor sections.

Abstract: A modular entrance floor system comprising a plurality of floor sections, the plurality of floor sections being disposed adjacent each other and defining a perimeter of an entrance floor area. Each floor section includes a base plate permanently coupled to a foundation, and a surface plate removably attached to the base plate. The surface plate has at least one drain feature. The plurality of floor sections are configured such that the surface plate of a first floor section is interchangeable with the surface plate of a second floor section, independent of the adjacent floor sections.

Abstract: A shutter used, for example, as a sunshade has blades that are pivotally coupled to frame members of the shutter by respective pivot shafts that are split longitudinally into upper and lower halves. The pivot shaft halves can be adjusted radially with respect to one another to take up free movement that might otherwise allow the blades to vibrate when the shutter is in use.

Abstract: A drop-out fire vent for a building has a plastic dome that softens and loses structural integrity with increasing temperature. However, the dome is prevented from dropping out by an internal trap door controlled by a fusible link that will release at a precise temperature. This allows the vent to be used in combination with sprinkler systems such as ESFR systems that require opening of the vent at a precise temperature after the sprinklers have been triggered.