Patent Publication Number: US-2015082716-A1

Title: Precision built staircase

Description:
The present application is a Continuation-In-Part and claims the benefit to U.S. Non-Provisional application Ser. No. 13/817,398 filed on Jun. 5, 2013, U.S. Non-Provisional application Ser. No. 13/817,398 filed on Jun. 5, 2013 claims priority to U.S. Provisional Application 61/374,571 filed on Aug. 17, 2010, the entire of all disclosures are incorporated by reference herein. 
    
    
     TECHNICAL FIELD &amp; BACKGROUND 
     Staircases have always been a hidden safety concern. Many times staircases have been assembled or constructed improperly and are unsafe. Imprecise measurements and cutting of staircase parts and components often result in unsafe steps and other staircase components that may result in people falling or tripping on the staircase as well. 
     The present invention relates to a staircase. More specifically, the present invention relates to a precision built staircase. 
     It is therefore an object of the present invention to provide a precision built staircase that is quicker and easier to assemble, has a longer-lasting aesthetically pleasing appearance and utilizes more precise pre-manufactured profiled structural stringers and pre-profiled decorative stringers than current staircases. 
     It is another object of the present invention to provide a precision built staircase with an added standard skirt board and a plurality of accessories that may be assembled in a few minutes that may be in compliance with various building codes and standards. 
     It is also an object of the present invention to provide a precision built staircase with a plurality of components with a plurality of aesthetic embodiments that may be manufactured with precision machinery such as a computer numerical control or a CNC router machine. The stair components to be profiled from a panel may be preferably routed face-to-face reversed (top-bottom, bottom-top) for raw material economy in the range of 26% to 38% for a first set of structural stringers and eliminate the need to make another set of structural stringers when the decorative final staircase may be installed. 
     It is an object of the present invention to provide a precision built staircase that ensures consistent dimensional productivity and installation at the right position with a plurality of winder&#39;s treads and risers set by utilizing a starter winder tread plank and a pre-profiled nose angled to a plurality of winder&#39;s treads that may be also easy to fix, well-aligned at the front surfacing and angled at approximately 90 degrees to the front of the starter winder tread plank and are quickly installable into a starter winder tread plank slot for a better final result. 
     It is another object of the present invention to provide a precision built staircase that allows easy and rapid assembling and attachment of the staircase components that includes a plurality of pre-drilled apertures and a plurality of standard brackets that may be glued together without any excess overflow of glue to a plurality of treads, risers and stringers. 
     It is also another object of the present invention to provide a plurality of standard skirt boards that may be temporarily or permanently utilized at a plurality of predetermined heights that are attached securely with one or more covers and one or more corner joints. 
     It is an object of the present invention to provide a precision built staircase with a plurality of components that may be easily sold and kept in stock across distributors, retailers, agents, installers, finishers and do-it-yourself suppliers on the market. 
     It is another object of the present invention to provide a plurality of precision built staircase components that may be easily stocked in a weather regulated warehouse or a store, that includes structural stringers, decorative stringers, skirt boards and other stair components that will not warp, curve, crack or split by utilizing kiln dried, engineered composite materials and/or other materials. 
     It is another object of the present invention to provide a precision built staircase in a kit form in a pre-assembled box that may be utilized as a cabinet, a closet or an outside shell that may be also available in a pre-finished or a non-finished form. 
     It is another object of the present invention to provide a precision built staircase that may utilize a plurality of different sizes, types, lengths, gages, with or without headed nails and screws. 
     It is another object of the present invention to provide a precision built staircase that is made of composite, hardwood, softwood, aluminum, steel, concrete, marble, granite, rough or prefinished materials, or other suitable engineered materials pre-assembled or non-pre-assembled. 
     It is another object of the present invention to provide a precision built staircase that may utilize a wide variety of glue types. 
     It is another object of the present invention to provide a precision built staircase and related components that may be manufactured in any desired shape, size, and/or dimensions. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will be described by way of exemplary embodiments, but not limitations, illustrated in the accompanying drawings in which like references denote similar elements, and in which: 
         FIG. 1  is a front perspective view of a staircase having a first tread with a recessed tread end cap, a new structural stringer, a new square, a new decorative stringer and a pre profiled skirt board with the new square fit into the structural stringer, in accordance with one embodiment of the present invention. 
         FIG. 2  is an exploded front perspective view of a staircase with a pre-profiled skirt board and a decorative stringer, in accordance with one embodiment of the present invention. 
         FIG. 3  is a front perspective view of a temporarily installed preliminary staircase, in accordance with one embodiment of the present invention. 
         FIG. 4  is a side view of a pair of skirt boards manufactured from a panel, in accordance with one embodiment of the present invention. 
         FIG. 5  is a side view of a pair of radius stringers manufactured from a panel, in accordance with one embodiment of the present invention. 
         FIG. 6  is a side view of a pair of square stringers manufactured from a panel, in accordance with one embodiment of the present invention. 
         FIG. 7  is a side view of a pair of angled outside radius stringers manufactured from a panel, in accordance with one embodiment of the present invention. 
         FIG. 8  is a side view of a pair of horizontal outside radius stringers manufactured from a panel, in accordance with one embodiment of the present invention. 
         FIG. 9  is a side view of a pair of vertical outside radius stringers manufactured from a panel, in accordance with one embodiment of the present invention. 
         FIG. 10  is a side view of a pair of winder inside radius stringers manufactured from a panel, in accordance with one embodiment of the present invention. 
         FIG. 11  is a side view of four squares manufactured from a panel with a plurality of tapered apertures drilled at a predetermined angle to receive a plurality of screw treads and a plurality of risers pre-nailed or screwed to a plurality of structural stringers, in accordance with one embodiment of the present invention. 
         FIG. 12  is a side view of a square attached to a structural stringer, in accordance with one embodiment of the present invention. 
         FIG. 13  is a front side view of a standard riser with a plurality of apertures and grooves for glue overflow, in accordance with one embodiment of the present invention. 
         FIG. 14  is front side view of a dowel and spring and a top riser, in accordance with one embodiment of the present invention. 
         FIG. 15  is an overhead perspective view of a tread with a positioned slot to receive a dowel of a riser, in accordance with one embodiment of the present invention. 
         FIG. 16  is a bottom perspective view of a tread with a positioned slot to receive a dowel of a riser, in accordance with one embodiment of the present invention. 
         FIG. 17  is a side perspective view of a tread and riser assembly at a level of a spring-dowel with a positioned slot to receive a dowel of a riser and a groove at a rear of a tread, in accordance with one embodiment of the present invention. 
         FIG. 18  is a side perspective view of a pair of grooves at a rear of a tread, in accordance with one embodiment of the present invention. 
         FIG. 19  is a top view of a first winder&#39;s tread fit at a starter winder tread plank, in accordance with one embodiment of the present invention. 
         FIG. 20  is side perspective view of a winder starter plank with a plurality of align recessed noses of a first winder&#39;s tread, a second winder&#39;s tread and a third winder&#39;s tread with a decorative jacket, in accordance with one embodiment of the present invention. 
         FIG. 21  is a side view of a second winder&#39;s tread fit at a winder starter plank, in accordance with one embodiment of the present invention. 
         FIG. 22  is a side view of a third winder&#39;s tread fit at a winder starter plank, in accordance with one embodiment of the present invention. 
         FIGS. 23  A-J are a plurality of side views of a plurality of shapes of a plurality of pre-profiled stringers, pre-profiled decorative stringers, standard skirt boards and standard squares and bars, in accordance with one embodiment of the present invention. 
         FIG. 24  is a side view of a packing box, in accordance with one embodiment of the present invention. 
         FIG. 25  is a top view of a precision built staircase, in accordance with one embodiment of the present invention. 
         FIG. 26  is a side view of a precision built staircase, in accordance with one embodiment of the present invention. 
         FIG. 27  is a side view of a reversible stringer-tread support, in accordance with one embodiment of the present invention. 
         FIG. 28A  is a side view of an attachment screw, in accordance with one embodiment of the present invention. 
         FIG. 28B  is a front view of an attachment screw, in accordance with one embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS 
     Various aspects of the illustrative embodiments will be described using terms commonly employed by those skilled in the art to convey the substance of their work to others skilled in the art. However, it will be apparent to those skilled in the art that the present invention may be practiced with only some of the described aspects. For purposes of explanation, specific numbers, materials and configurations are set forth in order to provide a thorough understanding of the illustrative embodiments. However, it will be apparent to one skilled in the art that the present invention may be practiced without the specific details. In other instances, well-known features are omitted or simplified in order not to obscure the illustrative embodiments. 
     Various operations will be described as multiple discrete operations, in turn, in a manner that is most helpful in understanding the present invention. However, the order of description should not be construed as to imply that these operations are necessarily order dependent. In particular, these operations need not be performed in the order of presentation. 
     The phrase “in one embodiment” is used repeatedly. The phrase generally does not refer to the same embodiment, however, it may. The terms “comprising”, “having” and “including” are synonymous, unless the context dictates otherwise. 
     In accordance with these objects which will be discussed in detail below, the present invention provides a complete line of modified stair components and, when assembled together with a plurality of accessories and an installation stair kit reduce installation time, achieve a higher percentage savings of raw material, manufacturing time, and installation time with high precision. 
       FIG. 1  is a front view of a staircase  500 , in accordance with one embodiment of the present invention. The staircase  500  may have a first tread  10  with a first recessed tread end cap  12 , a second tread  10 A with a second recessed tread end cap  11 , a third tread  10 B with a third recessed tread end cap  13 , a fourth tread  10 C with an added tread end cap  9 , a decorative stringer  4  and a pre-profiled skirt board  5  with a square  15  fit at a side of each of a plurality of structural stringers  3 . The staircase  500  may include any number of suitable sequential treads and risers. 
     The staircase  500  may relate to modifications and ameliorations that make the staircase  500  relatively easier to install and may be typically more economical to manufacture, saving manufacturing time and raw materials than traditional staircases and reduce in the range of 30% to 70% of the installation time due to the high precision of machinery (e.g., CNC router) utilized to produce many of the staircase components. When the staircase  500  may be assembled, the final result will be a better temporary fit or permanent fit. The staircase  500  may permit re-use of the structural stringers  3  installed at the beginning of construction and may only replace a rough tread  18  and a riser  17  initially and be temporarily installed by a plurality of chosen decorative treads  1 ,  10 ,  10 A,  10 B,  10 C and risers  200 , a decorative stringer  4 , a pre-profiled skirt board  5  and any other desired components, pre-finished or to be finished on a job site. 
     Staircases currently available on the market may be mostly assembled on a job site and to save installation time, few distributors offer them pre-assembled which may also be prefinished. When assembled on a job site, most of the time, stringers  3  may be cut manually with a skill saw approximately 2 inches×2 inches×12 inches which may be where precision discrepancies occur. When the staircases may be assembled at a manufacturing site, they do not necessarily have the high precision machines (CNC router) to perfectly cut the stringers  3 ,  4  and other high precision component&#39;s cut to the staircase  500  to size, if necessary. Typically it&#39;s very difficult to determine in advance the precision squaring and leveling of the walls, floors and ceiling formed approximately 95% of the time in a new building or a remodeled job site, resulting that some percentage of components fabricated or adjusted onsite must be reprocessed, resulting in a costly operation. 
     Installation of the staircase  500  may be considered by professional building contractors to be complicated work. The staircase  500  may be imperative to introduce into a large market, products that may be installed in less time and with more efficiency and precision than traditional staircases. Structural stringers  3  may be a significant part of substantial saving in manufacturing, raw material, installation time and an attractive final long lasting aesthetic appearance. Regarding the stringers  3 ,  4  and pre-profiled skirt board  5 , the manufacturing&#39;s precision and relative rapid execution offer distributors, retailers and others a reasonable price and better compliance of building codes. Structural stringers  3 , decorative stringers  4 , a pre-profiled skirt board  5  and a plurality of winder&#39;s treads ( FIG. 19 ,  201 ,  202 ,  203 ) may be manufactured in a through panel, that may also be reversible and made of many materials such as engineered, laminated, plywood, composite, kiln dried or other suitable materials to reduce the components curving, warping, cracking, shrinking or expanding too much. All these elements may be required to be avoided so that precise manufacturing at the beginning of the manufacturing process may avoid the need to reinstall new stringers  3 , when the staircase  500  may be installed. 
       FIG. 1  includes a pre-profiled skirt board  5  and a basic skirt board ( FIG. 26 ,  2631 ) that adds a desired aesthetic fit and hides a plurality of nails  16  and/or a plurality of screws  19  may be utilized at a top side of a plurality of treads  1 ,  10 ,  10 A,  10 B,  10 C and a plurality of risers  17 ,  200  and/or space between the wall  550 , the treads  1 ,  10 ,  10 A,  10 B,  10 C and the risers  17 ,  200 , when there may be, a staircase or a winders staircase installation. 
     The one or more tread&#39;s end caps  11 ,  12 ,  13  may be added at one or both sides of treads  1 ,  10 ,  10 A,  10 B,  10 C and formed recesses made at a depth of the typical length of overpass of the decorative stringer  4  (open decorative stringer) at approximately ±50% of thickness of tread and at approximately 100% or less of the width of treads ( FIG. 15 ,  116 ). The end cap ( FIG. 1 ,  11 ,  12 ,  13 ) may be shaped as desired and will typically be disposed at a side and an overpass at the rear of the tread ( FIG. 17 ,  113 ) to hide imperfect fits of the decorative stringer  4 , a vertical radius ( FIG. 9 ,  902 ), a horizontal radius ( FIG. 8 ,  802 ) and/or an angled outside radius ( FIG. 7 ,  702 ) of stringers  4  or simply for a decorative look from a round cover ( FIG. 26 ,  15 C). An angled square ( FIG. 2 ,  575 ) of any suitable outside or inside shape may bring the same corrections resulting in a different aesthetic appearance at a lower price L-shape at a bottom rear tread radius when treads  1 ,  10 ,  10 A,  10 B,  10 C may be nosed at a right side and/or a left side of the staircase  500 . 
       FIG. 2  is an exploded front view of a staircase  500  with a pre-profiled skirt board  5  and a decorative stringer  4 , in accordance with one embodiment of the present invention. 
     The pre-profiled skirt board  5  may be installed quickly without any scratches on the treads  1 ,  10 ,  10 A,  10 B,  10 C or the risers  17 ,  200  such as a plurality of pre-finished treads or a plurality of pre-finished risers utilizing a plastic tape  6 , with a resistant glue  7  disposed on one side of the plastic tape  6 . The pre-profiled skirt board  5  may be laid down over the plastic tape  6  preinstalled at a wall side over the treads  10 ,  10 A,  10 B,  10 C and the risers  17 ,  200 . The basic skirt board ( FIG. 26 ,  2631 ) or pre-profiled skirt board  5  may be slid-up to the front of the risers  200  and may be pushed to the wall  550 . The plastic tape  6  may be removed by manually tearing-off the plastic tape  6 . The plastic tape  6  may similarly be utilized for the pre-profiled skirt board  5  of a winders staircase set. 
       FIG. 3  is a front view of a temporarily installed preliminary staircase, in accordance with one embodiment of the present invention. 
     The cover joint  18   a ,  18   b ,  18   c  and the corner joints ( FIGS. 25 and 26 ,  2542 ,  2550 ,  2560 ,  2580 ,  2585 ,  2590 ) will time efficiently cover a plurality of cuts ( FIG. 2 ,  18 B) at a plurality of joint eliminating touch-up areas. Any corner joints  18 B,  2542 ,  570 , cover joints  18   a ,  18   b ,  18   c ,  2540 ,  560 ,  2580 ,  2587  or starter winder tread plank  101 ,  2550 ,  2552  will be utilized to hide jointed cuts (good or bad), nails  8 ,  16  or screws  19 , acting as a recess for a pre-profiled skirt board and a multi-use skirt board  5 , a plurality of pre-profiled decorative stringers  4 , a plurality of treads  1 ,  10 ,  18  and a plurality of risers  17 ,  200 . Some molding ( FIG. 3 ,  560 ) with an angled overlap will hide as well, over and at the side of these pre-finished or non-prefinished components and the angle between the back of molding  560  formed at the wall and the top of the skirt board may be approximately 91 or more degrees or other suitable angle. One or more nails  8 ,  16  that secure the pre-profiled skirt board  5  to a wall  550  from the top of skirt board  5  will be hid with an overlap angled molding  560 . 
     When the rough and/or decorative staircase components may be ready to be installed, a reversible square  15  or bar (not shown) could be secured by gluing, nailing or screwing to the inside structural stringer  3  at the back of staircase  500 . The square  15  or bar (not shown) underneath the rough tread  18  may be set in place and pushed to the back of the riser  17  that may be already secured in place. It may be significant to install at least two previously described auto adhesive resilient material or spongy material ( FIG. 12 ,  15 A) to the top of the square  15  or bar (not shown) and at least one, if desired, to the middle vertical front of the square  15  to be utilized. This process may be repeated at all triple stringer contacts ( FIG. 12 ,  3 ) to the left or the right of the staircase if there may be more than two structural stringers. 
       FIG. 3  illustrates when installers replace a temporary staircase on a job site for a decorative staircase, the rough treads  18  and the risers  17  may be nailed or screwed to a structural stringer  3 , however this may not be possible to do for decorative threads and risers to be installed. The staircase  500  remedies this and allows the pre-profiled skirt board  5  or the basic skirt board ( FIG. 26 ,  2631 ) to be installed at the wall over the nails  16  and/or screws  19  and potential wrong cuts of treads and risers may then be hidden by the thickness of a pre-profiled skirt board  5  or a basic skirt board ( FIG. 26 ,  2631 ). 
       FIG. 4  is a side view of a pair of skirt boards manufactured from a panel attached face to face, in accordance with one embodiment of the present invention. 
     With the height of risers  47 A and tread&#39;s runs  43 A being precise, further ameliorations allow for an easier and quicker installation. After face-to-face manufacturing, the risers  47 A and tread&#39;s runs  43 A may be approximately identical. Tread run  43  is equivalent to  43 A, nose profile  44  is equivalent to  44 A, riser height  47  is equivalent to  47 A and the top of the staircase skirt board  42  is equivalent to  42 A. Most of the staircase  500  may be made with a reversible pair face to face like process. Nose profiles  44  and  44 A may be profiled at any desired shape and dimensions. 
       FIG. 5  is a side view of a pair of inside radius stringers or skirt boards manufactured from a panel, in accordance with one embodiment of the present invention. 
     Some pre-shaped inside square cover ( FIG. 1 ,  13 ) with or without an inside radius  502  or an outside radius  702 ,  802 ,  902  may be added to a bottom rear tread outside of the decorative stringer  4  and/or the square angles  602  to match and cover a manufactured inside  502  and the bottom shape of the rear tread when the tread may be nosed at one or more sides. 
       FIG. 5  illustrates a stringers riser&#39;s inside radius  502  that may be disposed on a riser rear bottom ( FIG. 13 ,  131 ) adjacent to decorative angled or standard risers to assemble with a decorative stringer&#39;s risers  4  at a predetermined height ( FIG. 3 ,  570 ). If the width of the riser ( FIG. 13 ,  200 ) may be too wide, the predetermined height of the riser may be cut at a desired height minus inside radius  502  or at approximately ±15 degrees from the front bottom riser predetermined height. Typically all risers  200  that may be installed permanently at any length may be pre-cut at each end of the riser  200  at an approximately ±45 degree angle or more and more typically at an approximate 47 degrees angle ( FIG. 1 ,  590 ), where the fit with decorative stringer  4  riser height pre-angled cut will be typically suitable and if the riser angle may not be necessary and may be cut square as needed without creating an inadequate fit. 
       FIG. 6  is a side view of a pair of square pre-cut stringers  601  and a square angle  602  manufactured from a panel, in accordance with one embodiment of the present invention. 
     When utilized as a pre-cut skirt board, the pair of square pre-cut stringers  601  may be fixed directly over the stringer, treads and risers that may be installed properly against the pre-cut skirt board and if some imperfections occur then tread rims ( FIG. 25 ,  2595 ,  2650 ), tread rim extenders ( FIG. 26 ,  2630 ), molding ( FIG. 25 ,  2575 ) usually matching the tread rim design and tread rim blocks ( FIG. 26 ,  2620 ) may be utilized to hide imperfections, utilized to give a certain style and in all cases save installation time and money and procure a longer lasting aesthetic appearance. 
       FIG. 7  is a side view of a pair of angled outside radius stringers, all outside radius angles or outside shape between horizontal  802  and vertical outside radius  902  manufactured from a panel, in accordance with one embodiment of the present invention. 
     The pre-shaped outside square cover or end cap ( FIG. 1 ,  11 ,  12 ,  13 ), a round cover ( FIG. 26 ,  15 C) and an angled square ( FIG. 2 ,  575 ) may be utilized to hide outside radius  702 ,  802 ,  902  or square angles  602  and even fit or hide inside radius  502  at the rear and or bottom of the lateral overlapped tread&#39;s nose. 
       FIG. 8  is a side view of a pair of horizontal outside radius stringers manufactured from a panel, in accordance with one embodiment of the present invention. 
     The pre-shaped outside square cover ( FIG. 2 ,  590 ) also includes outside radius  702 ,  802 ,  902  or square angles  602  at the rear and/or bottom of lateral overlapped tread&#39;s nose. 
       FIG. 9  is a side view of a pair of vertical outside radius stringers manufactured from a panel, in accordance with one embodiment of the present invention. 
     The pre-shaped inside square cover ( FIG. 1 ,  11 ) also includes outside radius  702 ,  802 ,  902  or square angles  602  at the rear and/or bottom of a lateral overlapped tread&#39;s nose. 
     The back of staircase  500  has to be finished and frequently a professional contractor installer or painter may be required to return several times to completely finalize the staircase construction, which may be costly. One way to eliminate this may be to supply standard backing panels to be adjusted to the back of the staircase to be typically equally cut at the jobsite at each side, to be properly fit, pre-finished and fabricated from any suitable material available. The backing panel of the staircase may be pre-finished or non-prefinished, plain or with any suitable types of printed, pressure printed, molded designs, grooved or with any suitable designs, textural finish or composition of products adaptable to the back of staircase stringers  3  or  4 . Many different types of molding shapes or designs may be added to all joints and/or walls, floors or ceilings adjacent to the staircase  500 . If the stairs, backing panel and moldings may be pre-finished, there may be no need to have other professionals come back to finalize the construction of the staircase, resulting in a substantial savings of time and money with a more convenient decorative final result. The decorative backing panel of the staircase may be installed with a plurality of nails or a plurality of screws with or without glue with preferably some backing cross-member installed between the stringers when necessary and desired sound padding may be added between standard backing panel and back of treads and risers. Any molding ( FIG. 3 ,  560 ) should be installed in a floating orientation secured to the wall and should allow for shrinking and expansion variations of structure that do not affect the final aesthetic appearance. 
       FIG. 10  is a side view of a pair of winder inside radius stringers manufactured from a panel, in accordance with one embodiment of the present invention. 
     A standard holder bar will come at a plurality of predetermined lengths and typically has the same dimensions as the top of the longer side of the square ( FIG. 11 ,  15 ) and may be secured at the rear of the square  15  when more strength may be needed to attach treads to the tread&#39;s runs of stringer (e.g. Winder&#39;s tread  1 ,  2 ,  3  to winder&#39;s stringers ( FIG. 19 ,  1001 B,  1001 H)). 
       FIG. 11  is a side view of four squares  15  manufactured from a panel with a plurality of reversed tapered apertures  215  drilled at a predetermined angle to receive a plurality of screw treads and a plurality of risers pre-nailed to a plurality of structural stringers, in accordance with one embodiment of the present invention. 
     After completion of these operations, all rough treads ( FIG. 3 ,  18 ) and risers ( FIG. 3 ,  17 ) may be torn-out and ready to receive the new pre-finished or to be finished desired risers ( FIG. 1 ,  200 ) and treads  10  to structural stringers  3  and pre-profiled decorative stringers  4 . These components may be tighten with a plurality of screws  209  from the back of the staircase  500  through the reversed taper apertures ( FIG. 11 ,  215 ) beneath and in back of the square  15  to beneath the treads and to the back of the riser. Any nails  8 , 16  and/or screws  19  to the top of the treads and the risers ( FIG. 1 ) that will be eventually hidden, will be permitted and facilitate the securing of the treads and the risers from the back of the squares  15  or bars ( FIG. 27 ,  2700 ). 
       FIG. 12  is a front view of a square  15  attached to a structural stringer  3 , in accordance with one embodiment of the present invention. Similar suitable techniques to form or drill angled apertures and tapered apertures will be applied as well including securely screwing treads and risers to tread&#39;s runs  580  of stringers ( FIG. 3 ,  3 ) with a plurality of previously described pieces of sticky and spongy material  15 A placed between square  15  or bars (not shown) and treads  1 , 10 , 18 . 
       FIG. 12  illustrates that square  15  firmly maintains the desired position in regards to temporarily or permanently attached treads ( FIG. 1 ,  10 ), risers ( FIG. 1 ,  200 ) and stringers ( FIG. 12 ,  3 ). Two pieces of sticky and spongy material  15 A may be added on top of square  15  to be attached to treads  1 ,  10 ,  18  underneath and at least one piece of sticky and spongy material  15 A such as cork, foam, rubber, or felt may be added at the vertical front side of the square  15  to be attached at the rear risers ( FIG. 13 ,  200 B). The piece of sticky and spongy material ( FIG. 12 ,  15 A) may be typically square or round or the like and may be auto-adhesive which will act as a spacer being squeezed when screwed through a bracket aperture  215  to the back to the tread ( FIGS. 1 ,  2  and  3 ,  1 ,  10  and  18 ) and riser ( FIGS. 1 ,  2  and  3 ,  1 ,  17  and  200 ) resulting in a relatively tighter fit to the stringer  3 . 
       FIG. 13  is a front side view of a standard riser with a plurality of apertures  208 A,  203 B, and grooves  207 A,  202 B for glue overflow, in accordance with one embodiment of the present invention. 
     When an end-user desires a permanent and solid installation, glue may be typically applied to the structural stringers ( FIG. 12 ,  3 ) at the suggested grooved shape at tread&#39;s runs ( FIG. 3 ,  580 ) or ( FIG. 27 ,  2712 ) and/or to the riser&#39;s heights ( FIG. 3 ,  570 ), top of risers ( FIG. 13 ,  207 ) and/or bottom front riser&#39;s grooves  202 B to the riser to be tighten to the rear of tread ( FIG. 16 ,  113 ) or the rear of tread slot or grooves ( FIG. 17 ,  119 ) to be tighten to the front bottom of standard riser  200  B through the desired pre-drilled apertures  203 B at the bottom of the riser with appropriated screws  209 , introduced at the back of the standard riser rear bottom. The typical screws to be utilized for the staircases&#39; installation may be a plurality of screws  209  that may be self-drilled forming a plurality of angled apertures  208 A or a plurality of apertures  203 B,  203 A or at the level of a printed line  201  A without a plurality of pre-drilled holes across the riser from the back of the riser to the back of the tread and may be tempered of suitable appropriated lengths. A complete kit of screws needed for the installation of chosen staircase will be available for sale and other ways to save time and errors. 
       FIG. 13  illustrates a top of the risers  200  that may be attached to the treads  112  underneath the angled apertures  208 A at specific angles typically with a plurality of screws  209  that may be self-drilled and tempered. Addition of a plurality of grooves disposed on top of a riser groove  207 A or a bottom front  200 A permits a better grip and possibility to add glue such as Place or PL type glue, typically in permanent installation without regarding the height of the standard risers desired and minimizing overflows of glue onto unwanted portions of the risers. 
       FIG. 14  is front side view of a dowel and spring and a top riser, in accordance with one embodiment of the present invention. 
     Some others modifications to risers  200  and treads  10  will attach them at the right position quickly, precisely and tight fit together temporarily and/or permanently (with or without glue) to underneath the front of tread  116 . One of these may be, at least one aperture  210  located at the approximate middle of the top riser length and plus or minus half-thickness of the riser to insert a dowel  205  or preferably a spring  206  plus a dowel  205  in wood or in other material to the bloc riser at the desired position when the dowel  205  may be engage in a slot ( FIG. 15 ,  208 ) at the same distance underneath the tread nose  114 . The dowel  205  may be introduced in the slot  208  by the pressure action of the spring  206  pushing the dowel  205 . When both the dowel  205  and the slot  208  may be connected together, the standard riser  200  may be ready to be screwed securely underneath the tread  116  without slipping out of slot, through angled apertures ( FIG. 13 ,  208 A) pre-drilled from back of riser  200  B to the top of the riser with suitable screws  209   
       FIG. 14  is a plurality of printed lines  201 A to help to fix the inside bottom riser  202 A to the back of the tread  113  with screws  209  from the lowest marker line staying after cutting the needed riser height. The preferred shapes at the top of the riser ( FIG. 1 ,  200 ) should be a W-shaped section ( FIG. 23F ) and or triple V-shaped section  FIG. 23  J (e.g. a double big V-shaped section and small V-shaped section disposed in middle top of riser). This triple V-shape will allow glue to be disposed with a gun at the middle V-shaped section to overflow in double V-shaped section of each side when the treads and risers will be tighten together. At the bottom front  200 A of standard riser  200  at least one groove and typically 4 grooves may be provided to permit adhesion and accommodate overflow of glue when rear of bottom tread ( FIG. 17 ,  119 ) and bottom front riser  202 B may be secured together through at least one aperture of a plurality of apertures ( FIG. 13 ,  203  A) that may be pre-drilled and may be accommodated with one or more suitable screws  209 . 
       FIG. 14  illustrates a top  207 A and a bottom front  200 A of risers that may be nailed or screwed to riser height ( FIG. 3 ,  570 ) of structural stringer  3  at an identical level to the top tread&#39;s runs  580 , the top of below riser which has at least one aperture, a dowel  205  or a spring  205 ,  206  to match the slot  208  in the front of and underneath tread  116  to be typically nailed or screwed in a desired precise position. 
       FIG. 15  is an overhead side perspective view of a tread with a positioned slot to receive a dowel of a riser, in accordance with one embodiment of the present invention. Prior to installing a plurality of rough risers  17  of treads  18 , structural stringers  3  may be installed at a precise position initially with glue and may be then nailed or screwed to wall  550 . 
       FIG. 16  is an overhead side perspective view of a plurality of bottom treads with a positioned slot to receive a dowel of a riser, in accordance with one embodiment of the present invention. 
       FIG. 17  and  FIG. 18  illustrate an overhead side perspective view of a tread and riser assembly at a level of a spring-dowel with at least one groove  119  and/or a radius  118  at a rear of a tread  113  with a positioned slot  208  to receive a dowel  205  of a riser  200 , in accordance with one embodiment of the present invention. 
     Top of risers  207 A and bottom of risers  202 A may be nailed or screwed to riser height ( FIG. 3 ,  570 ) of stringer ( FIG. 2 ,  4 ) at an identical level to the top tread&#39;s runs  580 , the top of riser below tread which has at least one aperture, if desired, a dowel  205  or a spring  205 ,  206  to match the slot  208  if wished in the front of and underneath tread  116  to be typically screwed in a desired precise position. This new way eliminates the need to use steel squares or pre-drilled bloc&#39;s onsite, usually utilized by professional contractors. The rear of tread bottom  113  includes a tread radius  118  and a tread groove  119  when necessary. 
       FIG. 17  is an overhead side perspective view of a tread and riser assembly at a level of a spring-dowel with a groove at a rear of a tread with a positioned slot to receive a dowel of a riser, in accordance with one embodiment of the present invention. 
     There may be also a tread groove ( FIGS. 17 and 18 ,  119 ) disposed at the rear of the tread to accommodate any glue spillage and overflow and therefore more glue for a potentially stronger attachment. A plurality of multiple grooves accommodate any glue spillage or overflow that may be typically installed at the middle rear portion of the tread  10  that may be firmly secured to the riser and tread together to minimize the possibility of glue spillage and overflow over the tread top. The one or more grooves ( FIGS. 13 and 14 ,  207 A) at the top of the riser  200  also have the same function of catching glue spillage and minimize overflow. 
     Any of the one or more grooves provide a strong, permanent and tight attachment of any adjacent components when the components may be made of wholly or partly engineered products, such as OSB, particleboard, fiberboard, plywood, LVL, LSL, softwood and other materials that may easily possibly break, split or allow for a screw or nail to be easily torn-off or removed. 
       FIG. 19  is a top perspective view of a first winder&#39;s tread fit at a starter winder tread plank, in accordance with one embodiment of the present invention. 
       FIG. 20  is a side perspective view of a starter winder tread plank  101 , a plurality of aligns recessed noses  150  of a first winder&#39;s tread  1 , a second winder&#39;s tread  2  and a third winder&#39;s tread  3  with a decorative jacket  100 , in accordance with one embodiment of the present invention. 
     Starter winder tread plank  101  assures the installation of winder&#39;s treads  1 , 2 , 3  to firmly and accurately align each other in a plurality of predetermined single or double recessed slots  1 A, 2 A, 3 A at a predetermined precise riser height desired and to tightly attach winder&#39;s risers  1 B, 2 B, 3 B, 4 B at right angles to the adjacent to wall starter winder tread plank  101  and winder&#39;s treads  1 , 2 , 3  together. 
       FIG. 21  is a side perspective view of a second winder&#39;s tread fit at a starting plank, in accordance with one embodiment of the present invention. 
     Decorative starter plank jacket  100  may be added any time after treads and risers may be installed over the rough starter plank  99  and holder of starter plank. To build a staircase  500  on-site will save from 4 to 6 hours of installation time in contrast to a traditional staircase and to build on site a staircase  500  with a set of 3 winder&#39;s treads and risers, the saving time will be up to 9 hours in contrast to a traditional staircase. This large time savings will be appreciated by professional building contractors and do-it-yourself customers who wish to install their own staircase. 
       FIG. 22  is a side perspective view of a third winder&#39;s tread fit at a starting plank, in accordance with one embodiment of the present invention. 
     Decorative starter plank jacket  100  may be added any time after treads and risers may be installed over the rough starter plank  99  and holder of starter plank. To build a staircase  500  on-site will save from 4 to 6 hours of installation time in contrast to a traditional staircase and to build-on site a staircase  500  with a set of three winder&#39;s treads and risers, the saving time will be up to nine hours in contrast to a traditional staircase. This large time savings will be appreciated by professional building contractors and do-it-yourself customers who wish to install their own staircase. 
       FIGS. 23  A-J is a plurality of side perspective views of a plurality of preferred shapes of a plurality of pre-profiled stringers ( FIGS. 23A ,  23 B,  23 C,  23 D,  23 E,  23 F,  23 G,  23 H and  23 J) of skirt boards ( FIGS. 23A ,  23 B,  23 C and  23 E,  23 I) of squares and bars ( FIG. 23C ) of decorative stringer riser high ( FIG. 1 ,  590 ) pre-cut at 45 or more degrees ( FIG. 23  D,E,H) in accordance with one embodiment of the present invention. 
       FIG. 24  is a front side perspective view of a packing box, in accordance with one embodiment of the present invention. 
     Packing box  2400  may be provided to transport any staircase components that need to be protected when carried to the job site. Some components may be long such as stringers  3 ,  4  and the basic skirt board  5 ,  2631  and may be also fragile to carry. More specifically when prefinished, the packaging box  2400  should be solid and very protective and typically may be very costly. The packing box may also have a second use as a cabinet and/or closet with or without a door or a cover  2430  that may also be split into two or more sections  2410  and  2420  that may also be usable as furniture (e.g. a cabinet for tools and accessories or a shoes cabinet open shell) or any other desired suitable utilities or applications, pre-finished or non-pre-finished. The packing box may potentially save money, prevent environmental waste, as well as protect staircase components to be delivered and serve as a strong marketing tool for a manufacturer, or any intervenient in distribution and sale of staircases and or other domains. The dual purpose packing box may be adapted to any type of suitable products to be carried needing suitable appropriated protection. The packing box may be made of any suitable type of material, at any suitable desired dimensions, engineered design, or other needed specification. Different kits of shells, doors and accessories associated with the packing box  2400  will be available on request and may be customized with specified specifications as well. 
       FIG. 25  is a top perspective view of a staircase, in accordance with one embodiment of the present invention illustrates contact between some of the components that permit a better adjustment when assembled temporarily and/or permanently together. The staircase  500  attempts to correct or hide imperfections in cutting and assembling and/or further variations of adjacent construction components. The staircase  500  attempts to minimize the time of installation, to maximize the quality of assembly and to minimize the touch-up areas. Other ameliorations regarding temporary and permanent attachment from original components suggested to treads  1 , 10 , 18  and risers  17 ,  200  together contribute to minimizing the time needed to assemble stair components together in the staircase  500  and ameliorate the need for a high tightening strength. 
     The back of the staircase  500  may be attached between the first wall  2510  and the second wall  2520  and behind a third wall  2530 . A skirt board starter joint  2542  attaches the back of the staircase  500  with the third wall  2530  typically at each corner. There may be also a corresponding cap  2540  disposed on each of the skirt board starter joints  2542  to protect the skirt board starter joints  2542 . A winder starter plank  2550  attaches the back of the staircase  500  to the first wall  2510 . A cap  2552  may also be disposed on the winder starter plank  2550  to protect the winder starter plank  2550  and skirt board&#39;s cuts. A middle skirt board joint  2560  attaches the back of the staircase  500  to the second wall  2520 . A cap  2562  may be disposed on the middle skirt board joint  2560  to protect or cover the middle skirt board joint  2560 . An outside skirt board corner joint  2570  also attaches the back of the staircase  500  to the second wall  2520 . A cap  2570  may be disposed on the outside skirt board corner joint  2580  to protect the outside skirt board corner joint  2580 . A tread rim extender tread  2590  additionally attaches the first wall  2510  to the back of the staircase  500 . A tread rim  2595  may be disposed to slide underneath the tread rim extender tread  2590  to further attach the back of the staircase  500  to the first wall  2510 . A reversible molding  2575  also attaches the back of the staircase  500  to the first wall  2510 . A skirt board ender joint  2585  may be disposed underneath the reversible molding  2575  to further attach the back of the staircase  500  to the first wall  2510 . A cap  2587  may be disposed on the skirt board ender joint  2585  to protect the skirt board ender joint  2585  and the basic shirt board ( FIG. 1 ,  5 ) or ( FIG. 26 ,  201 A). 
       FIG. 25  illustrates engineered skirt boards that may be typically installed in two or three parts because single engineered skirt boards of a suitable length may be typically not available and may be very difficult to carry and time-consuming to manufacture especially with a fit-at-joint assembly. These engineered skirt boards may be also less aesthetically attractive than other longer skirt boards for end-user customers. Most of staircase components mentioned in this document may be made with this manufacturing process (reversible pair face to face) and save in the range of approximately 26% to 38% of raw material and most cover joints of any kind utilized to hide cut and or imperfection may be made of one or two or three pieces of any kind of material, prefinished or not. 
       FIG. 26  is a side perspective view of a precision built staircase  500 , in accordance with one embodiment of the present invention. 
     The staircase  500  includes the reversible molding  2575  or  560  which may be disposed on top or bottom of the staircase  500 . There may be also a cap  2610  on the top of starter corner joint  2540  of the staircase  500 . The skirt board inside corner joint  2540  may be underneath the cap  2610 . A tread rim block  2620  may be disposed underneath the skirt board start joint  2540 . A tread rim extender  2630  may be vertically or horizontally attached to each vertical portion of a basic skirt board  2631  of each height of the staircase  500 . The tread rim extender  2630  may be attached to the vertical portion basic skirt board  2631  with preferably at least one pinned nail. The tread rim  2595  may be then provided on the distal end  2650  of the horizontal portion  2652  of each step. The round cover  15 C secures the vertical portion  2642  and the horizontal portion  2644  together and the screws  209  assemble firmly top riser to underneath tread nose side and same for bottom front riser to back of tread. The overlap angled molding  560  has a pair of ends  562  with an L-shape flat flange  2660  provided on the ends  562  of the overlap angled molding  560 . The skirt board ender joint  2585  and cap  2587  may be provided at the bottom of the staircase  500 . 
       FIG. 26  illustrates the basic skirt board  2631  that will accommodate and accept a wide variation of riser heights variation up to +/−⅞ths of the height of the tread rim while preserving an aesthetically pleasing installed skirt board, that is perfect-fit even when some variation of at side components. 
     The packing box  2400  will permit the delivery of longer components such as full length skirt boards, stringers and full length molding  560  and  2575  without anxiety regarding the components being broken or damaged while being transported. 
       FIG. 27  is an overhead side perspective view of a reversible stringer-tread support  2700 , in accordance with one embodiment of the present invention. 
     The structural stringer  3  has a plurality of grooves  2710  disposed on top of the structural stringer  3 . The grooves  2710  may be typically convex grooves  2712  but may be any suitable shape. The grooves  2712  permit glue to overflow and spill on either side of the grooves  2710  and permit a better and larger grid surface, while also providing a better hold and attachment at the right level. There may be one or more taper apertures  2720  provided as well. This reversible stringer-tread support  2700  sit perfectly in grooves  2710  of structural stringer  3  and eliminate the need to use any square  15  and ( FIG. 12 ,  15 A) to well secure tread to structural stringer  3 . 
     The standard stringer tread support  2700  may also be reversible. A plurality of grooves  2712  found on structural stringer  3  permit the glue to overflow and spill on either side of the grooves and permit a better and larger grid surface while also providing a better hold and attachment. 
     Typically the grooves may be disposed around the sides of the stringer that may be cut with a plurality of grooves  2710  to lock down, align and set the reversible standard stringer tread support  2700  quickly at a desired height and level without the need to add  15 A spongy material like the one utilized on top of square ( FIG. 12 ,  15 ). Similar to all of the components of the staircase, grooves disposed around the stringer permit to quickly and easily be assembled all together with or without glue. 
       FIG. 28A  is a side perspective view of a screw  209 , in accordance with one embodiment of the present invention. 
     The screw  209  includes a threaded portion  2810 , a screw head  2820  and a non-threaded portion  2830 . The threaded portion  2810  may be disposed on a rear half  2802  with a distal end  2803  of the screw  209 . The screw head  2820  may be disposed on a proximal end  2804  of the screw  209 . The screw head  2820  may be a Phillips head shape  2822  or any other suitable shape of the screw head or combined example (Phillips and Square #3). The non-threaded portion  2830  may be disposed on a front half  2806  of the attachment screw  209  and accommodates a thickness of any tread. There may be also a self-drill end  2840  disposed on the end of the distal end  2803 . Right now on the market, there may be no screw available for this application that may be more then steel gage number  9 . Steel gage number  10  or higher should be utilized to firmly assemble a structural staircase. 
       FIG. 28B  is a front perspective view of an attachment screw  209 , in accordance with one embodiment of the present invention. The threaded portion  2810 , the screw head  2820  and the non-threaded portion  2830  and their components of the attachment screw  209  may be the same as illustrated and described in  FIG. 28A . The screw head  2820  may be a Phillips head shaped  2822  or any other suitable shaped screw head as previously described in  FIG. 28A  or combined, example (Phillips and Square #3). Installation of the staircase and its components may be done from the top of the staircase to the bottom of the staircase, eliminating the need for an installer to walk on the tread during the installation, which may be typically done during the installation. This also allows the installer to work alone without a helper during the installation utilizing a top to bottom installation. The precision of the structural stringer and the prefabricated components assembled together permit the installation of a prefabricated skirt board after the structural stringer, tread and riser may be installed, usually that may be typically impossible to do with a regular installation with material currently on the market. 
     While the present invention has been related in terms of the foregoing embodiments, those skilled in the art will recognize that the invention is not limited to the embodiments described. The present invention may be practiced with modification and alteration within the spirit and scope of the appended claims. Thus, the description is to be regarded as illustrative instead of restrictive on the present invention.