The invention relates to guard rail systems. In particular, this invention relates to guard rail systems which are fabricated at the site of installation from kits of components.
Guard rails are used around decks, staircases and other elevated structures, to prevent injury and possible death from falling off of the edge of such structures. Most building codes have rigid requirements for guard rails, both in terms of when they are required and certain construction parameters, including for example the maximum spacing between balusters, length of span, height and load requirements.
The installation of guard rail systems can be a very labor intensive procedure. Balusters must be installed at precise intervals, and be substantially true to the vertical, both to comply with building code requirements and to be aesthetically acceptable.
Guard rails can be constructed from lumber, and frequently are in order to keep costs down. In a typical lumber guard rail construction balusters or pickets are nailed or screwed to top and bottom rails, which in turn are nailed to posts secured to or around the structure. A considerable amount of attention is required to ensure that the balusters are evenly spaced and vertical, and there is a limit to the aesthetic appeal which can be achieved. Moreover, the resulting guard rail is subject to separation, warping and other weathering effects over time, due to limits on the strength and degree of structural integration which can be achieved using nails and lumber.
Guard rails can also be fabricated from components that typically include bottom rails, top rails, balusters that fit between the top rails and the bottom rails, posts and hardware that includes screws and brackets for connecting the components together. The top rails, bottom rails, balusters and posts typically are extruded components made of aluminum, plastic or another suitable material. An example of this type of guard rail is disclosed in U.S. Pat. No. 7,472,482 B2 to Pratt. As is typical in this type of guard rail system, Pratt teaches that balusters which are preferably (but not necessarily) extruded, are fastened to a lower rail and to an upper retainer at fixed intervals. The balusters are provided with central bores for receiving fasteners such as screws through predrilled holes in the upper retainer and lower rail.
Whether cut from lumber or extruded, the assembly and installation of the guard rail requires considerable skill, labor and time in order to construct a guard rail which is both structurally secure and appealing. There is a need for a guard rail system that is easier and less time consuming to install than the guard rail systems that are currently available in the market. This guard rail system must also be durable, meet all applicable building code requirements and be aesthetically appealing.
We provide a guard rail system that is assembled from a kit of components that includes bottom rails, top rails and balusters. Our kit also includes top rail inserts that fit into the underside of the top rails. The top rail insert has a base with spaced apart openings, each opening sized to receive a baluster. A pair of uprights is attached to the base. Each upright has a bottom edge attached to the base and a top edge opposite the bottom edge, an inside surface and an outside surface. There is a flange extending from the inside surface of each upright adjacent to the top edge and a rib on the outside surface of each upright. The uprights are spaced apart a sufficient distance between their bottom edges to receive the balusters between the inside surfaces of the uprights. The flanges on the uprights are in a common plane and stop the balusters as they are inserted through the spaced apart holes in the base of the insert.
The top rail has a body and a pair of spaced apart legs extending downward from the body. Each leg has an inside surface that faces the inside surface of the other leg. The legs are spaced apart a sufficient distance to receive and grip the uprights of the top rail insert. Each leg has a projection on the inner surface of that leg. The projection is sized and positioned to pass over the rib on the outside surface of one of the uprights on the top rail insert when the top rail is attached to the top rail insert. The installer should be able to hear an audible click immediately after the projection passes over the rib. We prefer to provide a ledge on the outer surface of each upright which stops the leg of the top rail from continuing to move after the projection has passed over the rib. When the top rail, top rail insert and balusters are assembled in this way the uprights of the top rail insert press against the upper end of each baluster to create a compression fit. No screws are used to connect the balusters to the top rail or the top rail insert.
We provide a bottom rail which has spaced apart openings to receive the balusters. Preferably a pair of spaced-apart flanges are provided adjacent each opening which engage the bottom end of the baluster to create a friction fit. No screws are used to attach the balusters to the bottom rail.
Other advantages of our guard rail system will become apparent from certain present preferred embodiments shown in the drawings.
As shown in the drawings we provide a guard rail system 1 having a top rail 2, a top rail insert 3, a bottom rail 4 and balusters 5. The bottom rail 4 is preferably U-shaped and has a bottom rail insert 6 which together with the bottom rail form a tubular structure. A series of spaced apart openings 7 in the bottom rail receive the bottom ends of the balusters. The balusters are inserted into the bottom rail until they rest on the bottom rail insert. As can be seen most clearly in
The tops of the balusters fit into spaced apart openings 10 in the bottom 12 of the top rail insert 3. Uprights 13, 14 extend from the bottom 12 of the top rail insert. There is a flange 15, 16 extending from the inside surface of each upright adjacent to the top edge of the upright. See
As can be seen most clearly in
We prefer to make the top rail, the top rail insert, the bottom rail and the bottom rail insert in standard lengths of 6, 8 or 10 feet.
The guard rail system disclosed here can be installed much faster than the conventional guard rail systems because screws are not used to connect the balusters to the top rail and screws are not used to connect the balusters to the bottom rail. If desired one could use a conventional bottom rail with spaced apart holes for a screw that fits into a hole in a retainer in place of the bottom rail disclosed here. A system having a conventional bottom rail and the top rail disclosed here would be easier and take less time to install than a conventional guard rail system in which screws are used to connect the balusters to the top rail.
The assembled guard rail system shown in
While we have described and shown certain present preferred embodiments of our guard rail system, it is to be distinctly understood that our invention is not limited thereto but may be variously embodied within the scope of the following claims.
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Number | Date | Country | |
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20170234015 A1 | Aug 2017 | US |