Abstract: In the first embodiment, a staircase repair device or kit is provided which includes two components, namely, a stair tread repair member and a riser repair member. These members are placed on an existing staircase to provide a protective covering. In the second embodiment, a new staircase construction is provided which includes a plurality of stair tread members spanning between standard stringers. The components of the first embodiment and the stair tread member of the second embodiment are made of metal bent to desired shapes. Each is coated with a synthetic material to coat exposed surfaces or to completely encapsulate them therein. A slip-free wearing surface is formed by a layer of particles placed over the first coating, and a second coating of synthetic material which is applied over the dispersed layer of particles.

Abstract: A modular stone stair system using a plurality of modules in the form of stringers, risers, treads and landings in standardized thicknesses and widths. The risers, landings (if any) and treads have different widths dependent upon the width of the stairs desired, with the treads and landing (if any) being of the full width of the stair, and the risers being a modular width such that each tread or landing is underlain by a plurality of risers. Each level of the stair has a plurality of stringers, abutting the back of the tread and riser and running to the back of the stair. The stringers vary in depth depending upon how many steps are to be present, such that each level, except the bottom, overlaps the tread and riser of the next lower level by a fixed amount. The system can easily be assembled by two people, using a shovel, a level, and a ruler, giving the homeowner or contractor the option of choosing threshold heights, widths, and landings with varying depths.

Abstract: An arrangement for a grandstand having a series of sections, each section having a pair of sloping joists each provided with a number of vertical seating beam pillars and a number of walkways between the joists. Fastening and securing devices are provided at an upper part of each seating beam pillar. The fastening devices are provided with first locking devices capable of receiving second locking devices provided at the ends of seating beams intended to be mounted between two opposite seating beam pillars on the joists. One of the locking means has a resilient element. The first locking device is provided with a female member and the second locking device is provided with a male member. The resilient element allows connection of the male and female members with one another to lock the members in their connected positions. The resilient element has at least one tongue provided in connection with one of the members.

Abstract: The present staircase includes a permanent framing made of metallic stringers, one of which being typically secured to a half-timbering. vertically extending step supports are secured along the stringers and each include upper and front flanges adapted to be secured respectively to a tread and to a riser of each step of the staircase. A temporary staircase may be easily obtained with the present kit for use during construction, wherein a number of L-shaped steel step units are laid onto the step supports to form a successive series of alternating risers and treads. Then, these L-shaped steel units can be removed and replaced by finished steps of various configurations. If the staircase has an exposed side, a finishing stringer is provided thereat to conceal the structural metallic stringer.

Abstract: A support for steps, having the shape of a triangular corner plate to be installed one after the other along a stringer. The sides of this support are reinforced, horizontally and vertically, to fix the steps and risers. The ends are wider so successive supports overlap when installed. The wide part of the horizontal side includes in one embodiment a horizontal adjustment slit and the wide part of the vertical side includes a series of holes, at least one coinciding with the slit at the time of the installation on the stringer. Each wide part includes a second series of fixing holes spaced apart to secure the wide parts to the stringer. In another embodiment there is no slit but instead there is a pair of graduation rulers which overlap and permit direct reading of the width and of the height.

Abstract: The adjustable modular staircase includes two stringers for rigid attachment to a building structure in parallel, opposed relationship to each other, a plurality of axially parallel pins protrude out of each of the stringers and are spaced equidistant apart there along, the pins in one stringer are axially aligned with the pins in the other stringer when installed in the building structure, and a plurality of step modules, each including a tread and at least one end wall. The end wall has a top edge for supporting one end of the tread, a bottom edge inclined with respect to the top edge, and a notch in the bottom edge for releasably pivotally engaging one of the pins, whereby the step module can pivot around the pin to allow for horizontal leveling of each of the treads so as to form a rough staircase used for the early stages of the building process. Each step module preferably includes a riser having an end supported by a front edge of the end wall.

Abstract: In the first embodiment, a staircase repair device or kit is provided which includes two components, namely, a stair tread repair member and a riser repair member. These members are placed on an existing staircase to provide a protective covering. In the second embodiment, a new staircase construction is provided which includes a plurality of stair tread members spanning between standard stringers. The components of the first embodiment and the stair tread member of the second embodiment are made of metal bent to desired shapes. Each is coated with a synthetic material to encapsulate them therein. A slip-free wearing surface is formed by a layer of particles placed over the first coating, and a second coating of synthetic material which is applied over the dispersed layer of particles.

Abstract: A universal modular tread and riser unit for positioning on a stairway stringer having a predetermined slope. The unit, including an elongate tread wall having two ends including a connecting end and a free end. An elongate riser wall having two ends including a connecting end and a free end. The riser wall having its connecting end joined to the connecting end of the tread wall with the riser wall oriented in a depending perpendicular relation to the tread wall. A pair of spaced apart vertical side walls is secured on either side of the connected tread wall and riser wall. The side walls are spaced apart sufficiently to receive a stairway stringer with the free end of the tread wall resting on the stringer and the free end of the riser wall resting on the stringer.

Abstract: An improved stair tread for use in both residential and commercial construction directly beneath carpet and padding material is disclosed. The improved stair tread is fabricated from an engineered wood product such as Oriented Strand Board made of wood strips in a four layer process. Each surface layer is oriented perpendicular to the core layers and bonded with phenolic resin or other similar binding agents under intense heat and pressure to achieve the strength and performance criteria required for stair treads. The improved stair tread is machined from one inch thick structural panels using standard woodworking tools and has excellent workability. The finished stair tread is provided with a rounded, forward edge and a riser groove extending along its entire length. The improved stair tread provides a cost effective alternative to traditional solid wood stair treads.

Abstract: A modular stairway assembled from a stringer having a relatively planar, flat top, an initial step module fixed adjacent a lower end of the stringer, and several intermediate step modules attached to the stringer. The initial step module includes an upper edge, and a portion of the first intermediate step module bears against the upper edge of the initial step module. A method of constructing the stairway includes the steps of placing the stringer in position relative to a structure, anchoring the initial step module adjacent a lower end of the stringer to define an initial riser and tread for the stairway, and to define an initial stop.

Abstract: A stairway 2 is fabricated using a plurality of load bearing modules 4 that are attached to form a box beam 60 that can be freestanding. Each module 4 included flat vertical front and rear panels 6, 20 that are joined by vertical inside and outside panels 30, 38. The modules are joined by affixing the front panel of a higher module to the rear panel of the next adjacent lower module to form a stepped configuration. For a curved stairway 2, the helical box beam 60 formed of a plurality of trapezoid shaped modules 4 provides the principle support for the weight of the stairway 2 and the weight of any body positioned on the stairway. Longitudinal members 64, 66, 68 extending between the lower edges of adjacent modules 4 are loaded in tension and resist separation of the individual modules 4. Because the box beam 60 is the primary weight carrying member, the longitudinal members can be relatively thin and flexible and easy to fabricate.

Abstract: A bracket for use in manufacturing a step supported by a stringer. The bracket includes an anchor block to which a tread for a step may be attached, a pair of frames flanking the anchor block and fixed thereto, and markings formed on at least one of the frames. The markings indicate a rise and a run for the step. The bracket may be used in a method for building a stairs. The method includes the steps of selecting a desired tread distance and rise distance for the stairs to be built, fastening tread receiving portions and riser-receiving portions of a bracket to a first elongate stringer to define the desired tread and riser distances, repeating the above steps with respect to a second stringer, mounting a tread to the tread-receiving portions, and mounting a riser to the riser-receiving portions.

Abstract: The present invention is a prefabricated step and stairway system, where the prefabricated step is preferably a precast concrete step having an elongate body substantially triangular in cross-section having a first side as a tread, a second side as a riser adjacent the first side, and a third side, and the step further has a first and second end which preferably include an attachment member to attach the step between a pair of stringers. The attachment member is preferably integrated metal plates proximate to the first end and second end to facilitate attachment between a pair of stringers, and preferably includes one or more reinforcing members attached to the metal plates and integrated throughout the length of the body to strengthen the step. The prefabricated steps are rigidly secured either to intermediate runners between a pair of stringers, upon a brace, or directly to stringers to form a stairway.

Abstract: A step support brace especially for a swimming pool stair assembly includes vertically extending positioning posts that extend from the top of each horizontal riser portion of the brace associated with a stair tread some or all of which are slidably positionable from front to back along the respective horizontal riser portion to accommodate various stair module types and styles. The posts may also be cut off to a desired length in order to be received within an opening formed in the bottom side of the stair tread. The support brace also has a front hinge structure that allows the hingeable connection to another support brace to form a V-shaped configuration, thereby providing greater stair tread support if necessary.

Abstract: A corner stair and a corner wall of a pool are molded into an interal structure. A top step and riser are located at the required height to permit the lead bar of a swimming-pool automatic cover to be positioned over the step and against the riser such that the cover is completely over the pool including the top of the stair. Only an operation of the automatic pool cover is required to prevent rubbish from entering the pool and to eliminate the danger of small children entering the pool unattended.

Abstract: A stair system that uses angled brackets to form risers. The brackets are attached to wooden or metal boards. These boards are standard dimensional lumber. The ends of the boards must be cut to position them to support the stair, but no other cutting is required. The angled brackets have an upper section, and a lower leg portion that extends at a right angle to the upper portion. Both the upper and lower portions have flanges on them. The flanges support a tread. The treads fit over the brackets to form the actual stair. The treads are designed to receive carpeting to match the desired decor of the building in which the stair is placed. The treads are also designed to permit a mixed wood and carpet design. Wood flooring may also be used by placing the wood directly onto the brackets.

Abstract: Flanged Triangular elements for constructing a stairway which can be joined to provide a beam having adjacent tread and riser mounting portions.

Abstract: A stair support device is provided for installation on the upper surface of an inclined stair stringer. The device is foldable from a sheet metal template so as to define right-triangular first and second spaced-apart vertical sidewalls, positionable with their hypotenii along the stringer, the sidewalls being joined by an integral horizontal stair support surface. Preferably, the device further includes at least one and preferably two generally right-triangular support webs extending downwardly from against the stair support surface, positionable with their hypotenii on the upper surface of the stringer, thereby serving a load-bearing function between the stair support surface and the stringer. Various fold-out tabs are provided, to facilitate securing the device to the stringer, the stair against the stair support surface, and if applicable, a riser or kickplate against a vertical face of the device.

Abstract: A stair jack for constructing a staircase between an upper surface and a lower surface. The stair jack has a stair support member with a top inclined edge and a plurality of tread supports adapted to be fixedly coupled to the stair support member. Each tread support has a riser surface that projects upwardly from the top inclined surface and a trend support surface extending from the top inclined surface to an upper point of the riser surface. Stair treads and risers are affixed to the tread supports and riser surfaces, respectively, so as to form a staircase in which both the stringer and the tread support members are hidden from view.

Abstract: A modular support system useable for a pool or spa is disclosed. A prefabricated pool or spa stairs may be supported by utilizing a plurality of stiffeners each extending along the length of the bottom of a step of the prefabricated stairs. Within the stiffeners are a plurality of openings within which posts may be inserted. The posts contact the bottom surface of the top side of each stiffener to support the stiffener and a load placed upon the step supported by the stiffener. The stiffener is constructed to help minimize deflection of the step when a load off is placed thereon. A locking mechanism may be used to lock each post within into the opening. If desired, only posts supporting the top step may be placed upon a stable surface and the remaining posts, after insertion into their respective openings, may remain hanging above the stable surface. Concrete may be poured on the stable surface to embed each of the posts therein.

Abstract: A spiral stair case wherein segments of the outside stringer framework and segments of the central column are forming corresponding polygonal segments, wherein the spiral stair case preferably is made in octagonal polygonal segments, wherein one segment of the outside stringer together with one segment of the central column respectively is supporting preferably two stair treads of the the spiral stair case, wherein the segments of the outside stringer and the segments of the central column are strait, non curved elements, and wherein the stair treads are made strait and wherein all peripheral cuts are made strait, and wherein the segments are connected to each other by standard carpentry connection means, wherein the fascia, the baluster posts, the baluster filler parts and the handrail build the rigid outside stringer segments, wherein the outside stringer segments build a rigid, structural supporting outside stringer framework of the spiral stair case formed in polygonal segments and wherein the segments ar

Abstract: A stairway 2 is fabricated using a plurality of load bearing modules 4 that are attached to form a box beam 60 that can be freestanding. Each module 4 included flat vertical front and rear panels 6, 20 that are joined by vertical inside and outside panels 30, 3 8. The modules are joined by affixing the front panel of a higher module to the rear panel of the next adjacent lower module to form a stepped configuration. For a curved stairway 2, the helical box beam 60 formed of a plurality of trapezoid shaped modules 4 provides the principle support for the weight of the stairway 2 and the weight of any body positioned on the stairway. Longitudinal members 64, 66, 68 extending between the lower edges of adjacent modules 4 are loaded in tension and resist separation of the individual modules 4. Because the box beam 60 is the primary weight carrying member, the longitudinal members can be relatively thin and flexible and easy to fabricate.

Abstract: A staircase of monocoque construction comprises a pair of stringers, a series of successive and alternating treads and risers and nosings which are all made of solid wood or of composite wood such as O.S.B., pyrock, plywood, particle board, etc. At locations where these various components are to be joined, the components define facing grooves with a tapered space being also defined between the components. A gap filling substance, such as a polyester resin reinforced with micro-glass fibers, injected in the large ends of the tapered spaces fills the grooves as well as the tapered spaces and adhesively joins when it hardens the treads and risers one to another in succession, and also adhesively joins the stringers and the nosings to the treads and risers. The hardened resin "welds" the wooden components one to another thereby acting as a welded mechanical key, whereby the assembled structure forms a monocoque staircase. A method is also suggested to produce a monocoque staircase.

Abstract: A metal stairway constructed on site in a metal framed house. The stair steps are supported between a pair of trimmed sheet metal stringer panels on each side of the stairway. Each step of the stairway is formed of metal treads and risers cut to appropriate lengths from conventional joist members provided on site for the metal framed house. The metal treads and risers are attached at opposite ends thereof to the respective stringer panels by way of standard angled brackets provided on site for securing metal framing members together. Threaded self-drilling fasteners attach each angled bracket to a corresponding stringer panel and to an associated metal tread or metal riser. Wooden treads and risers are attached over the metal treads and risers by standard self-drilling screws.

Abstract: Prefabricated, preferably pre-cast concrete, stringers and treads can be employed to provide either a staircase of any required inclination, a horizontal walkway or a ramp of a required inclination. In all these applications, the same standardized stringers and treads can be effectively used. Stanchions can be added as required. Further embodiments can be used for providing ladders and for providing seating for grand stands or theaters.

Abstract: A stairset for the fabrication of a spiral stairway on-site, and a method for the assembly of the stairset. This stairset includes a central support to receive spacers to position a plurality of stair tread units at a selected separation (riser height), the stair treads extending horizontally outward. Further, components for a banister (handrail) are a plurality of segments, being a selected number for each stair tread unit, that are threaded upon a cable. The cable is provided on at least one end with means for tensioning, with final tensioning after general assembly of components (post-tensioning). A plurality of balusters are attached to, and extend downwardly from, at least a portion of segments of the resultant banister to be fastened to distal ends of the stair tread units. Specifically, the same number of balusters join the selected number of banister segments for each stair tread.

Abstract: A method is provided for manufacturing or converting a stairway made from wood-composite materials to a stairway which appears for all intents and purposes to be made from architectural solid wood materials. The method contemplates providing one or more stair treads and risers interconnected on one or more support stringers. This assembly may be preexisting or constitute new construction. With the stair treads and risers in place, sheets of veneer overlay are provided which are scribed and trimmed to cover at least the end portions of each tread, riser, or both, leaving the central high traffic portion of the tread exposed. Once trimming is complete, the veneer overlays are adhered to each tread or riser. With respect to the stair treads, it is preferred that a portion of the veneer is rolled around the leading edge of the tread and fastened to the underlying surface. Any irregularities or gaps in the joints between the treads, risers, and veneer may be concealed behind strips of molding.

Abstract: A three dimensional stringer pad affixed to the stringers of a staircase prior to applying carpet. The stringer pad is dimensioned to substantially completely overlay the stringer, has an inner flat surface which lies substantially flush on the stringer and has an outer surface which billows out from the stringer to create a three dimensional surface upon which carpet is later applied. Prior to applying carpet to the stringers of the staircase, the three dimensional stringer pads are applied to the stringers using nails or any suitable adhesive. Carpet is then applied to the stringers with the stringer pads interposed between the carpet and the stringers. Due to the billowing surface of the stringer pads, the carpeted stringers are provided with a three dimensional look which is aesthetically pleasing and which serves to further define the risers and treads of the staircase. Preferred aspects of the invention include constructing the stringer pads from inexpensive polyurethane foam or equivalent material.

Abstract: A stair tread, in which synthetic rubber is used to encase metal side core portions arranged at the side edges of a substantially horizontal core section at a downward right-angle thereto. A lip is provided along the side edges of the tread surface. The lip projects upward, the outside surface of the lip is flush with the surface of the synthetic rubber that covers the side core sections, and the lip is formed in one piece, of synthetic rubber.

Abstract: Improved methods of fabricating at least partially curved staircases include a first method in which preformed step structures have treads with curved slots formed in the underside of the ends which define a path for insertion of top edge segments of thin starter strips. The slots are collectively configured to laterally deflect the inserted starter strips in a manner longitudinally conforming them to at least partially curved paths of the overall stringer structures in the completed staircase. The stringers are then laterally built up and completed by securing reinforcing structures to the side surfaces of the laterally deflected strips. A second method uses preformed cooperating treads and risers themselves as a form which defines an at least partially curved path for the stringers.

Abstract: A construction unit (10) which is suitable for use in the fabrication of a stair stringer is provided. In one embodiment, the unit has three side members (12, 14, 16) which form a right triangle. The side member (16) forming the hypotenuse of the right triangle has a flat surface for locating the unit (10) against a flat support surface. The side members (12, 14) forming the other two sides of the right triangle are provided with channels (22) extending along their lengths, each for receiving the edge of a stair tread (28) or stair riser (30) forming sheet therein.

Abstract: A staircase cabinet comprises a plurality of treads each having an outer edge, an inner edge and a back surface; a pair of outer stringers both for defining opposed walls of the cabinet and supporting the outer edges of each tread; an inner stringer for supporting the inner edges of each tread; and fasteners for attaching the treads to the inner stringer and the outer stringers in alternating arrangement on respective opposite sides of the inner stringer to define an alternating staircase for use between a lower level and an upper level, the back surface of the treads and the outer stringers defining a cabinet space. The outer stringers comprise planar wooden sheets having an outer surface, and the fasteners pass only partially through the planar members to maintain the outer surface unbroken by the fasteners.

Abstract: A footboard for an indoor staircase which is temporarily fixed to notchboards with ease. In fixing the footboard to the notchboards, the lower end portion of a riser of the footboard is made free so that the footboard can be employed in the staircase provided with the same footboards each having different dimensions of the riser. The footboard for an indoor staircase comprises a riser 1 and a footstep portion 2 which is formed integrally with the riser in the L-shape, characterized in that the riser 1 having a hook portion 2 at the upper end thereof, the footstep portion having a lower end portion inclined downward, a rising portion 6 which rises from the end of the inclined lower end portion to a tip end thereof so as to reach a nosing 5 so that the hook portion of the lower positioned footboard can be hooked by the tip end of the rising portion of the upper positioned footboard, and fixing pieces 7 which are welded between the inclined portion 4 of the footstep portion and the rising portion 6.

Abstract: A step support used in the construction of a staircase that can be attached to a stringer and is capable of securely supporting a step. The apparatus comprises a relatively thin first side member, a relatively thin second side member and a filler block. The filler block is smaller than the first and second side members and is attached between them so that there is a gap between the first side member and the second side member. The step support is attached to the stringer so that the stringer fits in the gap and the side members extend over the sides of the stringer. The step support is attached to the stringer through the use of a plurality of fasteners.

Abstract: A reversible footboard for staircase is capable of changing the pattern on the same footboard by decorating the obverse and reverse surfaces thereof with different patterns. The reversible footboard for staircase to be fixed to notchboards for forming a staircase comprises a flat portion decorated with different patterns on obverse and reverse surfaces thereof either of which serves as a footstep portion, an upward projecting portion provided on one end of the flat portion for serving as a riser and a downward projecting portion provided on the other end of the flat portion.

Abstract: A stair support system for supporting a plurality of steps using an outer leg and stringer assembly. The stringer includes a plurality of risers which extend upwardly from the stringer to support the individual steps. Attached to and underlying each step is a channel member which extends along the length of the step and is sandwiched between the riser and the step's undersurface. Also disclosed is a deck support structure that is attachable to the outer leg to which the stringer is attached.

Abstract: A prefabricated stairway formed of a plurality of preformed steps composed of wear-resistant plastic or composite material which can be injection molded in units of one or more steps to permit inexpensive mass production and which are simple and inexpensive to install and can be formed of colored material to provide a highly aesthetic appearance.

Abstract: A bolted steel staircase is erected by placing side stringers spaced apart and attached to the upper and lower floors. A series of stair pans are placed on brackets, the brackets having been welded to the stringers in the fabrication location. The nuts are then hand-tightened on bolts which are welded to the brackets. A set of flat metal wedges, each having an angled slot, is driven between the vertical bolts and lances on the sides of the stair pans in order to align the stair pans and drive them against the stringers. After the wedges are driven, the nuts are fully tightened.

Abstract: A stair supporting frame made of a pair of stringers and a set of triangular blocks slidingly fitted in a groove provided in upper surface of the stringer. The groove has a uniform width defined by parallel sidewalls and the width of the blocks corresponds to the width of the groove. The blocks can slide into and along the groove. The degree of penetration of the blocks in the groove does not affect the outer appearance of the blocks relative to the stringer.

Abstract: A bracket for use in constructing a stairway of the type having stringers and a plurality of treads and risers. The bracket includes adjacent horizontal and vertical portions attachable to tread and riser members respectively, and an upwardly angled portion carried by an end of the bracket for attached to a stringer. The vertical portion of the bracket includes a downwardly directed finger which is grippingly receivable in an upwardly open slot means of an adjacent bracket, enabling a plurality of identical brackets to be firmly joined together and attached to a plurality of stringers to construct a stairway.

Abstract: Stair apparatus and method of manufacture, wherein the stair apparatus has concrete tread pads and landings which are poured and set during manufacture so that pouring and setting of the concrete does not have to be done in the field, thereby saving much labor and time. The method includes a unique step of clamping the step elements between the stringer elements so that the step elements are firmly held in proper position during welding thereof to the stringer elements. The landings are supported in a novel manner in a stairwell, and the stair assemblies are supported between the landings.

Abstract: A modified construction for a non-linear or curved staircase employs a technique in which the treads for the staircase are initially cut to the required shape and size. Flexible plywood boards of the same length and height as the required stringers are then attached to the treads with the treads positioned in the required locations and orientations so as to create a rigid self-supporting structure formed by the flexible boards and the attached treads and risers where required. The self-supporting structure is then finished by the attachment to the flexible boards of suitable laminations. House of treads have the laminations applied to the outer surface of the boards. Exposed end treads have the laminations applied to the inner side of the boards.

Abstract: Stair brackets are provided for mounting on stringers and supporting treads in stair structures extending between upper and lower floors. Lower brackets interconnect the lower floor, lower ends of the stringers and the lowermost tread. Angle brackets are mounted on the stringer between the lower bracket and the upper floor. Hangers secure the stringer upper ends to the upper floor.

Abstract: An adjustable staircase assembly comprises a pair of channel section stringer members having spaced tread support pivots adjacent their lower edges and tread locating apertures adjacent their upper edges, the tread locating apertures being spaced along arcs each having its origin at the tread support pivot axis. After the stringers are attached to a structure, the tread supports are pivoted to a horizontal position and a tab on each tread support is located in a suitable locating aperture in the sloping stringer such that the tread support is horizontal.

Abstract: A bleacher structure for spectators comprising a system of interconnected upright posts crossbeams, and diagonal stiffening members with channel beam seats and footrests locked into the structure by means of tab members in the crossbeams and clips bolted to the crossbeams.

Abstract: A stair having a central stringer and two side stringers adapted for mounting between an upper level and a lower level at a relatively steep angle of inclination. A plurality of tread members are disposed in alternating arrangement on respective sides of the central stringer and each tread member extends laterally from the central stringer to the respective side stringer. The tread members, which are substantially identical in shape, mateably join the central stringer and respective side stringers at tread member ends with a dovetail joint having a recessed mortise defining tread supporting shoulders. Handrails are provided at an angle substantially parallel to the stringers and of a height to support a user while descending the stair. Typically an upper tread member is provided which is even with the upper level. The stair is of a structure which permits disassembled shipment as a relatively compact, lightweight package and ease of assembly at a location of intended use.

Abstract: A stairway construction system is provided utilizing modular tread/riser stair step units and two or more notchless stringers.

Abstract: A construction for wooden stairs that permits standardized, factory machined components to be pre-packaged and shipped to the job site where they can be installed to fit almost any installation. The structure includes stringers which have riser and tread receiving grooves on both sides. The grooves on each side of the stringer provide for a different rise and run rate. The construction technique and the resulting stairs substantially reduces the job-site layout and assembly time from that required with conventional stairs. It also reduces the number of components that must be produced and stocked. The technique is especially applicable when employed with wooden stairs of the interlocking type that generally need no fasteners, adhesives or wedges.

Abstract: A swimming pool has a sidewall and a flexible liner, the sidewall defining an outwardly extending bay having opposed sidewalls between which a stair assembly is sealingly secured. The stair assembly is a molded structure having a continuous depending flange at the ends of the treads and risers and a hollow triangular stiffening rib extending longitudinally and generally centrally along the underside of each tread. A continuous coping embraces the upper edge of the pool sidewall, the upper edges of the opposed sidewalls and the upper edge of the top riser of the stair assembly. The opposed sidewalls of the bay are metal plates to which the depending flanges of the stair assembly are secured and those plates have edge flanges sealed to the edges of the flexible liner at the sides of the bay.

Abstract: A method of making a closed-tread staircase, and of making steps for such a staircase. The tread and riser of each step are each made from a rebated, grooved slab; the rebates on tread and riser are mated to form a joint, which is secured by a joining strip of `V`-shaped cross-section formed with flanges which are forced into the slab grooves. Steps are joined together in the same manner, and a staircase formed by supporting a series of steps upon two or more stair carriages, each carriage comprising a stringer with a series of spaced cleats secured to one side. Each cleat provides a horizontal tread-supporting portion and a vertical riser-supporting portion. Each stair carriage may be made using apparatus which provides means for supporting and indexing a stringer and supporting each cleat at a predetermined angle while cleat and stringer are secured together.