Abstract: This patent discloses a method and apparatus for activation of services in a concrete floor of an office building from below floor slab distribution systems. Void-forming boxes that are secured to a conventional metal deck sheet and surrounded by the concrete floor slab provide chambers in which in-floor activations are mounted. An insulating block in the void-forming box restores fire resistance, prior to installation of an activation kit, that is lost by displacement of concrete by the void-forming box. An in-floor activation kit may be installed within the void-forming box and connected to a below floor slab distribution system through an activation opening cut in the metal deck sheet. Connection hardware is secured to the metal deck sheet for connection to a conventional below-floor slab service distribution system providing communication from the interior of the void-forming box to the below-floor slab service distribution system.

Abstract: Each component includes one or more sets of pin and/or socket contacts each set being mounted on a contact block. The contact block has shield means surrounding the contacts and around each shield means in an outer housing. The shields and housing electrically and mechanically isolate the contacts.

Abstract: Fitting comprises an attaching ring secured to a pair of adjacent underfloor ducts and spanning the pre-punched access holes in the ducts, the attaching ring retains adjusting screws which in turn support an adjustable carpet plate which carries power/telephone outlets.