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Additional mineral board insulation 60 and a smoke seal 62 are installed in the field as required to comply with local fire codes. Note that the arrangement of the extruded aluminum header 64, horizontal airseal gasket 66 and horizontal sill extrusion 68 are also different in this embodiment. While the horizontal airseal gasket 66 is basically unchanged, the top edge of each pre-fabricated rigid panel 40 is finished with a wider extruded aluminum header 90 to accommodate the width at the top of these panels, as shown in FIG.
The bottom of each panel is finished with a narrow horizontal sill extrusion 92 because this portion of the rigid panel 40 includes the notch around the concrete floor slab 16, 16′. mapes architectural panels. Together, the header 90, horizontal airseal gasket 66 and horizontal sill extrusion 92 make up the horizontal expansion assembly which absorbs vertical interstory movement.
An enlarged detail of the arrangement of components 52, 54, 56, 58 and 66, 90 and 92 is presented in FIG. 8. In the same way as the system of FIGS. 4, 5 and 6 it is also preferred that this embodiment be implemented with high quality silicone (or similar) gaskets, and that the extrusions are designed to protect the gaskets.
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7, 8 and 9 also include vertical mullions 94, except that they are notched at the bottom, rather than at the top, to accommodate the “bottom of slab†installation for the sliding anchor 74. The notch must be wide enough to accommodate the sliding anchor, but still thick enough to allow room for insulation to be installed between the spandrel glass 52 and the face of the concrete slab 16, 16′.
Again, it is desirable that these vertical mullions 94 be allowed to slide with respect to one another to allow for thermal movement and building seismic movement - mapes insulated panels. The system of FIGS. 7, 8 and 9 can also be employed with “stick†curtain wall systems, and the same pre-fabrication methodology can be used as with the system of FIGS.
FIG. 9 presents an orthogonal sectional detail similar to that of FIG. 6. Though there are not shown in this view, the vertical mullions 94 will be finished with an exterior aluminum or stainless steel cap and pressure plate. As well, each vertical mullion 94 incorporates a vertical air seal gasket which is integrated into the split mullions, generating a continuous gasketed air seal system in cooperation with the horizontal air seal gasket 66 (spandrel panel curtain wall).
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As noted above, there is a sufficient gap between the vertical mullion 94 and the concrete floor slabs 16, 16′ to allow a layer of insulation to be installed. As in FIGS. 4, 5 and 6, each vertical mullion 94 is fastened to the concrete floor slabs 16, 16′ with two concrete anchors 74, 76; one at the top and one at the bottom.
These two fasteners 86 transfer the dead load and provide a moment connection between the vertical mullion 68 and the concrete anchor 76 - aluminum spandrel panel. Just as in FIG. 6, the concrete anchors 74, 76 are fastened to the horizontal surfaces of the concrete floor slabs 16, 16′ using standard expansion anchors 78 (or any other suitable type of fastener) as shown in FIG.
This is in contrast to curtain wall systems which require expensive anchors, embedded into the concrete floor slabs 16, 16′, generally on the face of the floor slabs. Also, the interior of the system is typically finished with the interior extruded aluminum closure trim 80 to cover up the mullion anchors at the underside of concrete slab 16, 16′, and the horizontal snap-on trim cover 82 is also typically provided at the sill extrusion to conceal the fasteners 78.
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4, 5 and 6, the remaining details of the system flow logically from the description provided herein, and would be clear to one skilled in the art. Standard 45°, 90°, doglegs and other corners can easily be pre-fabricated, each of these mullions being notched in the same way as the other vertical mullions.
Method of Installation The installation of the system of the invention is done in a way that is very similar to curtain wall systems. Firstly, the rigid panels are pre-assembled per step 110 of FIG. 10. Typically, the rigid panels 40 of the invention are shipped with the anchors 74, 76 already slipped into the vertical mullions per step 112, and are held there using tape or a temporary fastener, such as a sheet metal screw.
Per step 114, the rigid panels 40 are then hung from a little hoist from an upper floor, and are moved into position, adjacent to a rigid panel which has already been installed, and approximately three or four inches about its final installed position. Each rigid panel is interlocked with the adjacent rigid panel, the two halves of the vertical split mullion being snapped together.
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Once that is done, the anchors 74, 76 are simply pushed from the vertical mullions until they are flush with the surfaces of the concrete floor slabs 16, 16′, the rigid panel 40 is plumbed, and the anchors 74, 76 are fastened to the slabs 16, 16′. Then, using self-tapping screws or similar fasteners, the screws are fastened through the vertical mullions and the sleeves at the bottom, to create a dead load connection.
Finally, the system can then be fire-safed as required, and the installation is complete. ADVANTAGES The system of the invention provides a blend of conventional curtain wall and window wall systems. A curtain wall system is considered a high cost but best performing fenestration building envelope, cladding system for high rise buildings.
The primary advantage of the system of the invention is to combine the superior performance and design flexibility of a conventional curtain wall system with the economical advantage of a conventional window wall system. The main market for the system of the invention is residential condominium projects where developers have bought building envelope systems based purely on price.
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