This invention concerns the construction of residential homes for single families, large or small. Generally such homes are limited to two or three stories, often surmounted by an attic, and they may have a full height basement all or partly extending below grade. The homes of this invention are steel-framed homes with I-beam frames, steel wall panels and steel roof panels.
The homes embodying this invention are provided with steel frames of rolled structural steel I-beams, which may be precut and drilled, trucked to the building site, and assembled on site for erection.
Outer gable end wall panels and outer side wall panels having peripheral rims formed of steel channels, and steel studs framing door and window openings and spaced studs, are rigidified by diagonal bands and assembled between steel I-beam frames. All of the columns, beams and outer wall panels are successively bolted together, forming an external steel frame spanned only by floor beams and roof beams, essentially an exoskeleton.
The use of rolled structural steel for columns and beams in constructing residential houses has been proposed since the 1930's, perhaps influenced by the wide use of structural steel in framing tall office buildings. Dovell U.S. Pat. No. 1,958,473 shows heavy I or H beams and columns, with “cantilever” arms or beams rigidifying beam-column connections. Moloney U.S. Pat. No. 2,445,491 employs extremely heavy rolled beams and columns, with back-to-back channels sandwiching wood nailing strips incorporated throughout, for anchoring wood flooring, ceiling and wall panels to them. Goodson U.S. Pat. No. 4,514,950 shows many narrow one-story or two-story wall panels with horizontal studs spanning them, minimizing crane time by requiring cranes only for assembling higher stories. Pingel U.S. Pat. No. 6,112,473 likewise uses modular prefabricated wall and roof units stacked like building blocks, perhaps inspired by the “Habitat 67” apartment building at Montreal Expo 67.
Residential construction methods were basically unchanged up to the end of the 20th century. Wood prices are rising rapidly and the forests will not be able to produce wood fast enough to support the fast growing population. However, after years of experience in the construction field, it has been possible to design, develop and evaluate several types of structural steel framed houses, preferably a 3-story A-frame and 2-story Colonial, which address these concerns. Iron was carefully chosen as the building material for its maximum strength and durability. Iron is a totally recyclable material and there is a considerably good supply in today's modern society; we need not wait 60 years for enough lumber to grow.
The 3-story A-frame house and the 2-story Colonial shown in the drawings are framed of structural steel. Parts are welded and the adjacent units are bolted together with high tensile strength bolts. The use of iron in modern technology allows for faster, more accurate fabrication then conventional methods. This new method allows us to fly, with the imagination of design to lead us into the 21st century. The structural steel frames stand up independently and do not need interior bearing walls to support the frame and the floor system. These houses have 30 foot clear spans inside. This allows the purchaser/owner to determine the size of the rooms. The purchaser will be able to lay down and mark the furniture and decide on the size of the living room, kitchen, etc. All interior walls can be changed and modified quickly.
In the 3-story A-frame design, the first and the second story ceiling height is up to 122 inches, depending upon the choice of exposed beams or drop ceilings. The third story ceiling height to the peak is 14 feet high.
In both designs, the outside walls are 8 inches plus thick, which allows 9 inches of insulation for an insulating rating of R-30. Conventional buildings are rated between R-11 and R-19. The heating and cooling cost savings factor is up to 60 percent. Also, the soundproof factor is greater than in conventional homes.
Another advantage is the fact that structurally the house is fireproof, termite resistant and is able to withstand a substantial earthquake. Insurance premiums are low, because of the structure's fire resistance, strength and durability. With a structural steel frame house, fire damage is minimal compared to a wood framed house; it simply has less material to burn. In most cases the frame will stand, allowing rebuilding to be faster and keeping costs low.
The sturdy steel structure allows the house to have outside walls almost totally designed with glass, allowing for fantastic views. A glass house, cosmetically, for its exterior and interior, can be designed as a type of hunting lodge, or a raw stone and brick combination can be used as in an English Tudor style.
The construction methods are simple because of the way the whole structure is designed. In shop fabrication, all members are precut, prewelded and predrilled. The entire house is shipped to the building site in a package and assembled on the job site, quickly and accurately.
These houses are shipped in a package, disassembled in pieces, and do not take up a lot of room.
They are cost effective because they cut down on needed storage space compared to pre-fab modular homes and yet they offer accurate, fast assembly times.
With the A-frame house, you have an option to have balconies on the A-frame side or on the steep roof side, on the second and third floor. The A-frame has a huge overhang of 70 inches all the way around the house. This feature adds to the unusual character of this design.
The 2-story Colonial structural steel framed house preferably has a 30 foot clear span interior with a ceiling height of 107 inches, and optional exposed beams or a lower ceiling, with an overhang of 28 inches. The shop fabrication and erection methods are the same methods used for both designs.
A steel frame home, because of the design and the material used, requires minimum maintenance. They are termite and insect proof. The wall thickness and ceiling thickness design allows all utilities to be easily installed and maintained.
These houses are affordable, stronger than wood-framed houses, and lighter than wood-framed houses. Being made of steel, they are more versatile in design, are made of recyclable materials, have excellent wind and snow load durability, and can survive earthquake shocks. In earthquake areas, a steel foundation increases the survival factor during earthquakes. The estimated calculation for earthquake endurance is up to Number 4.
This design allows many opportunities for new ideas and innovative styles which can be merged or created in either design. Examples: Rustic wilderness cabins, total glass houses, 32 foot high family room areas with balconies looking down from the inside living area to the fireplace area, sunken living room areas, hand-forged iron spiral staircases, wood and iron combinations, lofts, totally prefabricated swimming pool inside with waterfalls, with an optional sliding floor, over the pool, thus completely camouflaged.
Accordingly, it is a principal object of the present invention to provide economical and effective methods for construction of sturdy, spacious residential homes of ergonomically appealing style with minimized construction time.
Another object of the invention is to provide rigid steel frames anchored together by steel-rimmed external gable end panels, side panels and roof panels to produce an exoskeleton structure with high ceilings and ample clear internal spans, facilitating customized internal partitions since internal bearing walls are not needed.
Still another object of the invention is to provide extremely robust residential homes with maximum capability for withstanding unexpectedly high loads produced by such natural occurrences as hurricanes, tornados, blizzards, earthquakes or mudslides.
A further object of the invention is to produce such residential dwellings with ample insulation ratings as high as R-30, and effective soundproofing.
Other objects of the invention will in part be obvious and will in part appear hereinafter.
The invention accordingly comprises the features of construction, combination of elements, and arrangements of parts which will be exemplified in the construction hereinafter set forth, and the scope of the invention will be indicated in the claims.
For a fuller understanding of the nature and objects of the invention, reference should be made to the following detailed description taken in connection with the accompanying drawings, in which:
The drawings of an A-frame home embodying the present invention,
A foundation sill beam 31, either an I-beam or a wide-flange or “H”-beam, preferably provides the level foundation for the balance of the steel frame; straight segments of sill beam 31 delineate the periphery of the building. They may rest on piers 32 (
Upstanding rolled steel beams, either I-beams or H-beams (wide flange beams) are employed as vertical columns 36 having their lower ends positioned on the sill beams 31. A cap or end plate 37 (
Two bolt holes 41 are formed in the cap or end plate 37, flanking web 39 as indicated in
In each of these end plates 37, the bolt holes 41 are predrilled both in the plates and in the adjoining column, beam or rafter, simplifying the bolting assembly steps at the building site as in the frames shown in
The Colonial home frames shown remote from the viewer in
Second story floor beam 51 and third story floor beam 52 from the A-frame home are shown in
Floor beams must carry static loads of furniture and also dynamic loads of human occupants. At times, many additional humans may be present in upper floor rooms, and the floor beams are illustrated with 15 or 18 inches in the depth of the beams, as compared to 8 or 10 inches in depth of the I-beams forming the columns 36, queen posts 42, rafters 46, short bracing beams 48 and third story ceiling beams 47.
Floor beams 51 and 52 have their ends bolted to flange plates 53 which are edge welded to the adjacent flange of a column 36, as shown in
As shown in
12″ 14 Gauge C channels upstanding on their flanges, spaced 16″ on centers, form floor rafters 56 atop floor beams 51 and 52, as shown in
These same interior construction details are also incorporated in the second story floor beam 51 in the colonial home (
The wall panels installed in the homes embodying this invention are shown in
The steel construction philosophy of the invention is embodied in these wall panels, as shown in
Each wall panel 61 of
Wall panels are installed as shown in
After each side wall panel 61 is bolted in position between frames, its lower rim member 68 can be spot welded or plug welded at 73 to the underlying foundation I-beam 31 (
Bars 72 with their holes 71 can easily be adapted to receive bolts 70 inserted through the side flanges of an A-frame gable end panel's side edge rim member 68. A pair of diagonal reinforcing straps or bars 74 are welded to steel studs 66 and rim members 68 spanning the height and width of each wall panel, as shown in
After adding a layer of Tyvek or similar windproof material for insulating value to the outside face of each wall panel 59, 61, any desired surface treatment may be installed: wood shingles, ship lap planking, clapboard siding, board and batten siding, vinyl siding or the like. Insulation may be installed between studs inside panels 59 or 61 before sheetrock or other interior wall surface panels are added.
The details of roof construction for the A-frame homes are shown in
Similar details of roof construction for the colonial homes are shown in
On each roof, the lowest of these angles 76 is positioned at the eave edge of beam 46 as seen in
A plurality of prefabricated roof panels 77 are dimensioned for precise alignment with the exposed upper flanges of the roof rafter beams 46. Roof panels 77 are dimensioned with a width to match the spacing between adjacent roof beams 46, corresponding to the width of side wall panels 61, 14 feet, for example.
Each roof panel is provided with peripheral rim channels 78 along its peak edge and its eave edge, and with similar side channels 79 along both of its side edges, channels 78 and 79 may be 8 inch by 14 gage C channels, as shown in the FIGURES, and their ends are preferably overlapped and welded together at the corners of each roof panel. Similar C channels are roof purlins 81 positioned spanning the width of the roof panel at intervals of about 4 feet, with their concave space between their flanges all facing the peak of the roof, and their ends welded to the two roof panel side channels 79.
The intervals between roof purlins 81 are dimensioned to bring their convex flat faces into precise abutting relationship to the flat faces of the upstanding angles 76 on the upper face of the roof rafter beams 46, as indicated in the FIGURES. As shown in
As shown in the
The peak edge of each roof plywood sheet 84 is bevelled to mate with the peak edge of the opposite sheet 84 along the peak or ridge of the roof, and an underlying mating ridge member 85a, preferably of wood, is joined to the peak edges of both plywood sheets 84 by self-tapping screws 86 (
Five or six roof angles 76 may be positioned along each roof rafter beam 46 in the colonial home of
Two individual roof panels 77 can be positioned one above the other to cover the longer roof height from eave to peak.
As each roof panel 77 is lowered at an acute angle position by a crane (
After prefabrication of all the component parts, including structural steel I-beams, channels, column beams, roof rafter beams, floor beams and purlins, have been cut to length, predrilled and provided with cap end plates 37 and flange plates 53 all welded in place, and after wall panels with studs and roof panels with purlins have been assembled, corner welded and made ready for installation, and all delivered to the construction site, the assembly process can begin.
Gable end frames are first assembled by bolting columns, floor beams, roof rafter beams, queen posts and frame members for supporting balconies to each other.
The first gable end frame is the first unit to be erected by a crane, and guyed in place by several guy wires after level and vertical plumb lines are verified.
Two-story side wall panels 61 can be added next and bolted to the columns of the gable end frame to form a U-shaped footprint embracing the foundation slab or excavation.
Additional intermediate frames and side wall panels 61 can next be added, and bolted to each other. The side wall panels are not load bearing, since the weight loads of all beams are carried by the rolled steel columns 36. When all side wall panels and intermediate frames are in place, and bolted together, the final gable end frame is added and bolted in place to produce the framed and wall paneled exoskeleton structure shown in
Prefabricated roof panels with plywood sheets added can now be lowered into place by crane, and their channel purlins promptly bolted to their abutting angles to rigidify the entire structure. Each roof panel can then be bolted to its adjoining roof panel, completing the exoskeleton of the home.
When plywood is added to the exterior of the wall panels, the structure is ready for the installation of plumbing, heating, airconditioning, lighting fixtures, electric power and communications circuitry and insulation, and then completed with interior wallboard, plywood, sheetrock walls and ceilings, and the construction of flooring, painting and trim.
The homes of this invention are thus uniquely sturdy, being heavy-duty welded or bolted steel boxes, strongly resistant to external loads caused by weather, earthquakes, avalanches or mudslides.
The steel frames and wall panels anchored together by bolts provide lightning rod protection, since a lightning bolt will be conducted through steel frames and components directly to sill beams embedded in earth; isolating the inhabitants from harm.
The advance precutting, predrilling of the structural steel and smaller steel components and their assembly with sturdy nuts and bolts make these components uniquely suited for transport to building sites where they can be quickly assembled into sturdy buildings for military use, headquarters, barracks and compounds. Use for expedition base camps or construction site administrative offices is also entirely practical. They are permanent buildings, but when no longer needed, they can be disassembled, reversing the construction process, and disconnected by removing nuts and bolts, thus preparing the components for transport and storage for future use.
It will thus be seen that the objects set forth above, and those made apparent from the preceding description, are efficiently attained and, since certain changes may be made in the above construction without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.
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