Integrated curtain wall and wireway distribution system

A curtain wall including an extruded aluminum sill having a first channel for receiving a glazed panel, a sill anchor/access portion for securing the sill to a poured concrete slab or slab wall, and toward the interior side of the sill, a wireway is defined in part by the sill and in part by a wireway cover for concealing power and/or data/telecommunication cables. The wireway cover may also include outlet devices or plugs arranged in a longitudinally spaced relationship.

TECHNICAL FIELD

The present invention pertains to curtain walls used for building exteriors and, more particularly, to an improved curtain wall having a wireway distribution system integrated therewith.

BACKGROUND ART

Curtain walls are typically constructed of extruded aluminum frame support members having generally U-shaped channels for supporting a plurality of panel members that serve as the exterior of a building. Such panel members are most often panes of glass, but other paneled building materials such as aluminum, granite, slate, or concrete are also utilized. Such panel members are often of identical size and shape. However, near doors, opening windows, or other access points into the building, panel members of different sizes and shapes may be utilized.

More specifically, such curtain walls generally include a horizontal sill member having an upwardly facing U-shaped channel at the bottom of a wall section, a horizontal head member having a downwardly facing U-shaped channel at the top of a wall section, and a plurality of vertical mullions running between the sill and head members. Panel members are supported by the U-shaped channels of the sill member and the head member, and the vertical joints between adjacent panel members are formed at the mullions. Typically, the mullions are disposed interiorly of the sill member, the head member, and the panel members so that only the joint between adjacent panel members, and not the mullions themselves, are visible from the exterior of the building.

An exemplary, conventional curtain wall is described and shown in U.S. Pat. No. 6,158,182, the entire contents of which are hereby incorporated by reference. As described therein, and with reference toFIG. 1, a sill member10is illustrated for securing a curtain wall to a concrete slab12. Although not shown inFIG. 1, a head member similar to sill member10secures the curtain wall to a concrete slab between floors of a building or other building structure, and a plurality of mullions span between sill member10and the head member. Sill member10is typically formed as an integral aluminum extrusion. Sill member10generally includes a channel section14, an anchoring section16disposed interiorly of channel section14, and a cover18.

Channel section14and cover18cooperate to secure a panel member20to sill member10. More specifically, channel section14includes a base14aand two legs14band14cthat form a upwardly facing U-shaped channel. A support member22rests on the top surface of base14a. Leg14bhas a groove24proximate the upper end of its interior surface, and leg14chas a support surface26proximate the upper end of its interior surface. Cover18has a downwardly depending resilient leg28that engages a groove30on the exterior surface of leg14c. Cover18also has a tongue32. Panel member20is supported within channel section14via setting block34and resilient gaskets36and38. Setting block34is disposed on the top surface of support member22. Resilient gasket36has a tongue36athat engages groove24of leg14b. Resilient gasket36is typically pre-installed in groove24of leg14bduring manufacturing of sill member10. Resilient gasket38has a groove38athat engages tongue32of cover18and a surface38bthat mates with surface26of leg14c. Channel section14further includes a plurality of support legs40below base14a.

Anchoring section16includes a base16a, a leg16b, and a plurality of support legs42below base16a. Base16ahas a plurality of holes44spaced along its length for receiving bolts or fastening means46, and the diameter of each hole44may either be substantially identical to the diameter of a threaded shank46aof each bolt46, or the hole44may be slotted to allow for horizontal adjustment of the sill position. Leg16bhas a groove48for receiving a tongue49of cover18.

The following technique is typically used to install a panel member20of such a conventional curtain wall. First, sill member10is laid on a shim56in the proper position on slab12and is used as a template to drill holes into slab12for each bolt46. One should note that shim56does not run continuously along the length of sill member10. Instead, shim56is used at low points of slab12to level sill member10, if necessary. Next, sill member10is removed from shim56, and a hole50with a larger diameter is drilled in the place of each of the holes drilled using sill member10. A structural insert52is then secured within each of holes50via epoxy or other conventional means. Each insert52has an internally threaded hole54for receiving bolts46. Sill member10is then repositioned on shim56and secured to slab12using bolts46. A sealant58is disposed on slab12along both the exterior and interior sides of shim56and a head member similar to sill member10may also be secured to part of the building structure using the above-described techniques. Thereafter, vertical mullions are secured between sill member10and the head member at appropriate intervals along the curtain wall. A support member22is disposed on base14aof sill member10, and setting block34is disposed on support member20. Panel member20is then installed from the exterior of the building, typically first being tilted into the channel section of the head member, and then being dropped into channel section14of sill member10. The cover18can then be installed in sill member10, and a glazing stop is installed in the head member of the curtain wall. Finally, resilient gasket38is disposed on tongue32of cover18of sill member10, and a similar gasket is disposed on the tongue of the glazing stop of the head member.

Of course, multiple panel members20are typically arranged side-by-side and are secured and sealed between sill member10and the head member in this manner, with their vertical joint overlapping at a mullion. This vertical joint must then be sealed from both the interior and exterior of the building using both resilient gaskets and/or structural silicone.

Current means of architectural glazing with metal framing generally include three types of systems: individual window units or ribbon windows; storefront or entry systems with structural capacity to span one or two vertical levels; and curtain wall systems which are self-supporting over the entire height of the building, as described above. As used broadly herein, “curtain wall” is understood to refer to all types of glazing systems with metal framing and “sill” is understood to refer to either a horizontal or vertical sill member depending upon the particular construction. Advantages of these systems over older wood or solid metal framing include increased glass areas for providing natural light to building interiors, structural capacity to support insulated glazing, and resistance to temperature and water infiltration. While such systems, and other conventional curtain walls, have proved to be reliable commercial building systems, they suffer from several drawbacks. One particular drawback of these types of systems is the limited opportunity to provide power and/or data to the predominate exterior walls of the building, unless a separate metal stud and finish partition, with conventional conduits and outlets, is created between or under the window system, which thereby requires increased labor for installation and destroys the aesthetic appeal created by the curtain wall and increased glass area.

DISCLOSURE OF INVENTION

The present invention overcomes the drawbacks of the prior wall structures by having a sill defining a channel for supporting a wall panel, the sill having a structural portion alongside the channel for securing the sill in place, and the sill further comprising an inwardly open recess defined by the sill inwardly of the channel and the structural portion thereof. A cover is provided for the recess, to thereby define at least one wireway for power and/or data/telecommunication cables. Still further, the cover may include outlet devices provided in openings defined for this purpose in the cover.

BEST MODE FOR CARRYING OUT THE INVENTION

Referring toFIG. 2, the sill structure of the present invention is shown generally by reference numeral100. Preferably, the glazed panel20is supported on a platform122via a support pad134or similar structure, similar to the previously described prior art structure ofFIG. 1. Further, the sill structure100includes the same or a similar type of upwardly open channel arrangement for receiving the panel and its platform, such as described previously with reference toFIG. 1. The specific construction of the sill structure may vary from that shown in the illustrated embodiments or described as the prior art, however, without departing from the scope of the present invention. A channel102preferably spaced inwardly of the glazed panel20serves to provide access to the anchor bolt46, in the same or similar manner as described above with reference to the prior art embodiment. The sill structure100as illustrated discloses a standard type of mullion used for supporting a glazed panel20from either the top or bottom thereof, and which allows the glazed panel to be mounted either horizontally or vertically. A cap104may be provided on the front surface thereof having a decorative or other specified profile.

In accordance with the present invention and as shown inFIG. 2, the sill100further includes a recess106that opens inwardly toward the building's interior space. This recess is defined by side wall member116band bottom wall member116a. The marginal edge portions of these walls116aand116bare so formed as to receive a removable cover panel120. The cover panel120may be of the same material as that which defines the sill (extruded aluminum), or may instead comprise a non-metallic synthetic polymeric material, or other material, without departing from the scope of the present invention. The cover panel120may have a ninety degree angle, as illustrated, in order to resemble a convention sill profile or, as will be appreciated by one skilled in the art, any other profile or angular surface connecting the marginal edge portions of walls116aand116bmay also be used. For instance, a generally trapezoidal cross section may be defined by cover120for the wireway. The marginal edges of the walls may further define sockets, one of which pivotally receives the cover for opening and closing movement such that the lower marginal edge pivots and the upper marginal edge provides a latching connection.

As thus constructed and arranged, a wireway is defined in the sill100for receiving a plurality of cables or conductors C. These cables C may be used to feed electrical power to outlet devices which are provided for the convenience of those occupying the interior space of the building, such as outlet plug130(seeFIG. 3) provided on the side wall of cover120. Alternatively, data/telecommunication jacks132(seeFIG. 3) may be provided in a similar fashion. It will be apparent that these plugs, outlet devices, and/or jacks can also be provided in one or more walls of the cover120, such as the top wall and the side wall, within the scope of the present invention. The wireway defined by the legs116band116aof the sill100can be reconfigured to enlarge or otherwise alter the cross sectional area of the wireway. The shape can be configured to accommodate raceway covers for various raceways available from current manufacturers. A further advantage of this wireway distribution system is the flexibility allowed by the removable cover120to install or modify the wiring at any subsequent stage of construction.

With further reference toFIG. 3, a divider250is provided in this embodiment of the sill200of the present invention to provide separate wireways for the data/telecommunication cabling D and the power cables C. The opposing walls216aand216bare preferably provided with recesses or other attachment means extending longitudinally along the sill for receiving divider250, which is shown extending diagonally through sill200. As should be apparent, other divider250configurations are also contemplated as within the scope of the present invention. Preferably, divider250is comprised of a metal or resilient polymeric material so as to provide electromagnetic shielding between the cabling D and the cables C, although any material capable of eliminating electromagnetic interference could also be used.

FIG. 4illustrates still another wireway configuration for a sill300that has generally the same geometry as the previously described embodiments for supporting the glazed wall panel20. At the interior or inner marginal portion of the sill defined by walls316aand316ba divider350may similarly be provided within the raceway as suggested for the embodiment ofFIG. 3. In addition, sill300includes an extending lip302which simplifies the installation of gypsum board G abutting with the sill300. More particularly, rather than requiring the gypsum board, or other wall material, to wrap around the sill at ninety degree angles, the lip302allows the gypsum board to merely extend straight into an abutting relationship with the bottom surface of the sill300, and the lip302then conceals the joint. The lip302as illustrated is substantially planar, however, any decorative, bullnose, or other desired profile could of course also be used.

The embodiments described by the present invention modify a removable sill channel typically used to conceal the bolts attaching the frame to the floor slab below. Similar snap-in finish channels are used on the vertical framing to match the sill frame and provide a unified appearance, and these framing members are often extended in depth to conceal gaps or edges of rough underlying structures. The present invention modifies the removable channel to allow wiring to run in the cavity formed by the extrusion. Thus, the horizontal and vertical window framing effectively forms a similar grid of conduit for power and data supply to the exterior wall. As will be appreciated, the specific channel profile will vary slightly, due to proprietary details of each framing manufacturer, however the concept and operation remains the same regardless of the system. The hollow channel may be used for low or standard voltage power, or data individually, or may be separated by a divider plate to prevent electromagnetic interference between the lines. A secondary advantage of this window channel supply system is the flexibility allowed by the removable cover to install or modify the wiring at any subsequent stage of construction. Standard receptacles for power or data plugs may be cut into the sill at any point along the length of the member, or the channel may be used as conduit only, with junction boxes concealed behind a finish wall or ceiling surface.

The present invention has now been described with reference to preferred embodiments thereof. The foregoing detailed description has been given for clarity and understanding only. No unnecessary limitations are to be understood therefrom. It will be apparent to those skilled in the art that many changes can be made in the embodiments described without departing from the scope of the invention. Thus, the scope of the present invention should not be limited to the exact details and structures described herein.