Abstract: A hardwood flooring system includes an upper layer of hardwood components and a subflooring unit composed of one or more layers of non-wood materials. One or more membranes separate the subflooring unit from the base material upon which the floor is installed and the upper hardwood layer, preventing the introduction of moisture to the vulnerable wood components of the upper layer from any layer below it. The relative positioning of the sublayer with respect to the upper layer and with respect to components of the sublayer, if more than one, acts to reduce or eliminate the damaging effects of negative forces experienced by the sublayers.

Abstract: Treatment booth provides patient isolation for sputum induction and aerosolized treatment. The booth is provided with a seat assembly to enable a patient to comfortably recline in a number of positions. Hazardous microbial airborne particles within the booth are filtered using a removable HEPA filter and U.V. germicidal radiation lamps supported by a rigid floor assembly constructed from a grid of interconnected longitudinal and transverse members.

Abstract: A flooring system which has a subflooring structure that is made up of two or more layers of boards laid across each other and spaced apart from each other to create an interconnected labyrinth of void spaces in the subfloor between a finished top floor and a base, an air moving device for moving air through the labyrinth to ventilate the subfloor structure and thereby reduce potentials for damage to the flooring system due to moisture build-up under the finished floor, and a humidistat positioned in the labyrinth of void spaces to detect moisture build-up and to activate the air moving device.

Abstract: A kit for constructing a yard barn comprising: a roof structure comprising, a plurality of elongated vinyl sheets of the type used as horizontally extending siding with each sheet having an upper and lower longitudinal curved edge created for interengaging locking one sheet to an adjacent sheet; a plurality of rafters supporting the vinyl sheets which are attached directly to the rafters; fasteners for attaching the vinyl sheets to the rafters; the rafters being composed of two angled members connected at their ends; a floor structure comprising a pair of prefabricated deck assemblies of reduced weight and size, each deck assembly comprising a network of joists attached at their ends to a side rail to form a support skeleton having an upper surface; a deck panel attached to the upper surface of the support skeleton; the network of joists having first joists attached at their ends orthagonal to the side rails, with intermediate joists extending between the first joists and with still further joists extending b

Abstract: A resilient flooring system arranged over a base floor which includes a layer of resilient pads supporting sub-floor panels in a generally side-by-side manner. Slots, in the form of an inverted L, are formed between opposed ends of the sub-floor panels and resilient pads. A limit bar, in the shape of a "Z" is arranged in the slots with its upper horizontal flanges extending in the upper horizontal leg of the slot and in engagement with a portion of one end of the sub-floor panels. Flooring boards are arranged over the slots and are secured with the sub-floor panels. Resilient strips are arranged in the slots over the lower horizontal leg of the limit bars. The resilient strips apply constant pressure to the under surface of the flooring boards in the area of the slots.

Abstract: A flooring system is provided for elevating flooring panels above a subfloor, such as the subfloor of a computer room. The invention provides a flooring substructure which has a plurality of elongated tracks arranged parallel to one another. A plurality of brackets are securable against the tracks, and a plurality of channel members are secured to the brackets so that the channels are aligned perpendicularly to the tracks. The channels are configured for supporting the flooring panels. Adjustable leveling screws are threaded upwardly through the brackets to contact the subfloor and support the substructure.

Abstract: A portable dance floor formed from the interconnection and interlocking of multiple dance sections each of which dance sections is formed from a dance substrate generally of plywood, wherein each dance section is supported off the ground. Dance sections interlock at the junction of four such sections, on the underside thereof into a main connector plate, and which sections interconnect along the interfacing sides of any two abutting sections by a spline disposed in a slot formed of aligned half slots. Transition members having an inclined plane to ease the change in elevation may be provided and may be interconnected in a similar manner to adjacent dance sections.

Abstract: A hardwood floor system has upper and lower subfloors of wooden panels, a plurality of elongated floorboards disposed above the upper subfloor and a plurality of uniformly spaced compressible, deflectable pads supporting the lower subfloor above a base, with at least one kerfed surface in the group of surfaces including the floorboard bottom surface, the upper subfloor surfaces, and the lower subfloor surfaces. In a free-floating embodiment of the invention, each of the pads includes a glide tip that is slidable with respect to the base. This combination of kerfs and compressible, deflectable pads provides a hardwood floor system that substantially complies with the performance characteristics established by the Otto Graf Institut of West Germany for evaluating hardwood floor systems, but in a more economical manner than another embodiment of the invention described in the parent application.

Abstract: An athletic flooring system having a fixed resilient sleeper. Sleeve members are passed through bored holes in the sleeper and anchored to a base so as to restrict the horizontal movement of the sleeper while permitting the sleeper to flex resiliently in the vertical direction. The flexibility of the sleeper is further enhanced by the provision of transverse saw kerfs cut into the top and bottom surfaces of the sleeper.

Abstract: A method of constructing a floor so as to prevent squeaking due to movement of the floor decking relative to the joists. The joists are installed, and strips of resiliently compressible cushioning tape are laid on the upper edges of the joists so that an adhesive side of the tape adheres thereto to keep the strip in position, and so that a non-adhesive side of the tape faces upwardly therefrom. Floor decking is placed on top of this so that the strip of tape is sandwiched between the decking and the joists, and the non-adhesive surface of the tape permits the decking to be slid thereover to a desired position. Fasteners are then driven through the decking and into the joist to secure the decking in position, and the resilient cushioning tape fills any gaps between the joists and the decking so as to prevent the decking from moving on the joists and causing squeaks. A tool for laying the strips of tape is made up of a handle portion and a spool portion.

Abstract: A flooring system in which flooring boards are held to an underlying support structure by use of clips that eliminate the need for fasteners extended through the flooring boards. In a preferred form of the invention, the clips have a barbed projection that is adapted to extend into a groove formed in the bottom of the flooring board to grip the board and hold it to the support structure. With this form of the invention flooring boards may be secured to a support structure simply by fastening the clips to the support structure and then pressing the boards into place on the clips. In another form of the invention, the clip is slidably attached to the support structure so that it can slide along the support structure, thereby enabling the boards to be moved toward one another after assembly to the support structure for reducing any gaps or spaces between adjacent boards.

Abstract: An anchored/resilient floor system includes at least one upper flooring layer supported by spaced, parallel rows of attachment strips which are supported above a base by a plurality of compressible pads, the attachment strips being secured to the base at spaced, predetermined positions therealong in a manner which permits downward deflection under loaded conditions but prevents vertical raising of the strips beyond their initial static position. Moreover, the attachment strips are anchored in a manner which does not hold the pads in a precompressed state when the floor is unloaded. Several fastening arrangements provide for anchoring of the attachment strips with these features, including a pin/sleeve construction, a wrapped mesh construction, an angled clip construction and a transverse band construction.

Abstract: A modular building structure for converting an existing building interior to a convenience store or the like comprises a grid made up of a first set of parallel metal tubes supportable by levelers on an existing floor, and a second set of parallel metal tubes supported on, and extending orthogonally to, the tubes of the first set. Rectangular metal floor panels are supported on the grid. The panels have aprons along two opposite edges for resting on tubes of the first set, and the other two edges rest on tubes of the second set. The grid tubes are engaged with feet extending horizontally from upright, wall-panel supporting posts. The feet are identical and each is adapted to receive and support grid tubes of either set.

Abstract: A floating support system for attaching flooring to a floor base comprising a plurality of transversely spaced sleepers arranged in longitudinal lines across a base floor. Each of the sleepers consists of rectangularly shaped studs arranged end to end along the longitudinal lines. Outwardly directed shoulder members extend along opposed sides of the studs so that a plurality of longitudinally spaced floor clips which are attached to the base floor along the longitudinal lines may extend over the shoulder members to secure the sleepers to the base floor. Cushion members are arranged below the studs in longitudinally spaced relationship. This provides sleepers which are restricted from lateral motion but have limited vertical movement through compression of the cushion members. This provides a level resilient flooring attached to the floor base.

Abstract: The invention is a resilient pad for placement under a floor system. The pad is made up of a base and a plurality of pad elements spaced longitudinally apart and attached to the base. At least one of the pad elements has a thickness which is greater than another of the pad elements. Because the pad elements have different thicknesses, the resilient pad provides desirable response and shock-absorption characteristics over a wide range of applied loads. Hence, the resilient pad is especially suitable for use with sports floors and the like.

Abstract: A horizontally level terrace floor having a plurality of solid blocklike support pedestals composed of a heat shearable material, that are directly affixed in spaced apart relationship onto a substructure. The support pedestals have been sheared to produce upper surfaces that are all horizontally level with respect each other. Atop the support pedestals are a plurality of joint dividers, and, a plurality of paving blocks are laid directly on the support pedestals, abutting the joint dividers.

Abstract: A suspended deck system uses prefabricated deck block modules as the working surface. Each block comprises a series of lateral beam bars in closely spaced, mutually parallel relation, having their ends secured by tie members splined in place. In one embodiment the deck blocks are of square plan-form, having wooden beam bars of substantially square section, with eased edges, having their ends tied by a thin, elongated wood spline. The block thickness and the length of the beam bars are selected to ensure the necessary bending strength when simply suspended by their ends in a loaded condition, as part of a suspended platform. In the case of a wooden decking the deck blocks are supported upon a framing of joists and cross-braces having rabetted upper edge recesses into which the deck blocks fit in flush-fitting relation. The blocks may be positioned in an alternating pattern, giving a visual parquet effect.

Abstract: A joist to be used as a top joist in a sporting floor in which a plurality of floor boards (1) or panels rest on a plurality of parallel top joists (3). The top joists (3) are spaced apart and rest on a plurality of parallel, spaced-apart bottom joists (4) extending substantially perpendicular to the top joists (3) and supported on a base (5) by means of blocks (6). The top joist has a narrow, upper flat surface (7) extending along the joist and adapted to engage the lower side of the floor boards or panels, and a narrow, lower flat surface (8) which extends along the joist and which is positioned directly opposite the upper flat surface and adapted to engage the upper side of the bottom joists (4). The joist has a thickness decreasing laterally outwards from these two flat surfaces (7, 8).

Abstract: A deck floor system for use in constructing a patio deck consists of a series of individual modules, each secured as a unit to the floor joists. Each module is constructed of a series of side-by-side floor members. The floor members are secured together into the module by threaded fasteners, which extend through spacers located between each floor member.

Abstract: A portable hardwood floor system of interconnected floor sections supported in spaced relation over a substrate includes a plurality of mounts attached to the bottoms of each of the interconnectable sections. Each mount includes a resilient pad to resiliently support the portable floor system above the base and a glide member located below the pad. The glide members are substantially noncompressible under normal floor loading conditions and have a relatively low coefficient of friction with respect to the base. The glide members are slidable on the base to enhance maneuverability in positioning and aligning the interconnectable floor sections, thereby to facilitate interconnection of the sections to form the floor system. The glide members also protect the portable floor section and/or the base and are also sufficiently durable to withstand frequent handling commonly required of a portable hardwood floor system.

Abstract: The improved structures of floorboard include a groove located in the underside of the floorboard, and a fixing block having a flange dimensioned to fit into the groove of the floorboard. The fixing block has a bottom portion intended to anchor in the cement foundation. The fixing block can be made to join with an elastic floor frame fastened to the cement floor. The floorboard can be conveniently and economically fastened to the cement foundation in various forms by means of the fixing block which is detachably fastened to the floorboard.

Abstract: The invention is for an athletic flooring system wherein the flooring substructures are proportioned and positioned so as to give to the flooring system preferred properties in point and area elasticity. The subfloor is made up of a first and a second wood subfloor wherein the first subfloor is less continuous and more elastic than the second subfloor. The subfloors act in cooperation with a pad and with void volumes distributed in the subfloor to give the flooring system elastic properties that will render the flooring system DIN certifiable under the DIN 18032, part 2, tests.

Abstract: A flooring support system comprising a floor having an upper surface and a lower surface, a base surface, a floor support for supporting the lower surface of the floor in spaced relation above the base surface, the support including a resiliently compressible body having a first end surface engaged with the lower surface of the floor, a second end surface facing opposite the first end surface and engaged with the base surface, a central portion located intermediate the first and second end surfaces, and pneumatic spring means in the central portion for storing energy transferred through the floor to the body and for returning to the floor from the body substantially all energy transferred to the body through the floor, the pneumatic spring including a mechanism for affording resilient deflection of the first end surface toward the second end surface and pneumatic air cells for resisting deflection of the first surface toward the second surface.

Abstract: An improved decking system is provided for an exterior deck extending from one side of a building. The exterior deck has a header around its periphery, a railing on the header and a plurality of joists spaced apart in parallel relationships between the header. The improvement consists of a plurality of plastic flooring members extending in slightly spaced apart parallel relationships transversely across the joists.

Abstract: A resilient sports floor comprising a top layer, which is designed to be a coherent sheet consisting of boards. In each board recesses are provided in the shape of mutually parallel grooves along the entire length of the board, in which grooves strips of a springy resilient material, e.g. a natural or synthetic rubber material or a porous, springy plastic material, are inserted. The thickness of strips is larger than the depth of grooves, so that the strips project below the underside of layer with their lower portion. The floor is provided with the free surface of strips directly against a rigid sub-floor. In case of extremely high loads strips will be pressed into grooves, so that the strips are relieved due to the fact that the floor is in direct contact with the sub-floor with its underside.

Abstract: A flooring construction is provided having a unitary construction with a top layer providing a finished flooring surface and an insulation layer adjacent the top layer. The flooring panel includes an upper portion and a lower portion. The upper portion has a larger dimension than the lower portion and extends outwardly beyond the lower portion. A recessed portion between the upper portion and the lower portion defines a channel. A plurality of interlock support elements having a vertical web and an upper horizontal flange are arranged so that the horizontal flange extends into the channel. The vertical web extends below the lower portion to raise the flooring.

Abstract: A flooring product (10) comprises a wood panel having an L-shaped surround (18) the base of which is located below the wood panel. A plurality of parallel aluminium battens (20) are connected to the base of the panel. These battens comprise a groove (30). In use two flooring products (10,50) having similar joint arrangements are secured together by locating the base of the surround (18) of each product in the groove (30) in the elongate members of the other product. The connection can not be disengaged unless one of the flooring products (10,50) is tilted relative to the other.

Abstract: A floor vibration-damping apparatus damps a horizontal vibration of a floor based on an earthquake or the like. This apparatus comprises a movable supporting portion for supporting a floor with being free to move horizontally, and a damper working portion made by a combination of a viscous damper fixed to a restricted position of the floor and a plurality of spring mechanisms positioned radiately with respect to the restricted position.

Abstract: An architectural thermal break section includes an elongate heat-conductive part having spaced elongate first and second side portions and having an elongate bridge portion extending between the side portions, the bridge portion having therethrough elongate first, second and third lengthwise slots, the second slot having at respective ends thereof first and second end portions which are transversely spaced from and overlap in the lengthwise direction respective end portions of the first and third slots. The break section further includes a lengthwise strip of a thermal barrier material which extends between and is fixedly coupled to each of the first and second side portions. A method of making the break section includes the steps of extruding a metal to form the heat-conductive part, thereafter applying the thermal barrier material to the heat-conductive part, and thereafter machining the slots in the bridge portion of the heat-conductive part.

Abstract: An attachment system, method and connector connection for constructing a structure having supporting members and supported members as most commonly found in house and patio wood decks, board walks, stair systems, wood benches and trellis systems. The structures using the present disclosures are characterized by the apparent absence of nails or other fasteners. In fact, however, the structures are securely fastened by nails or screw fasteners in combination with a unique connector which uniquely is not directly connected to the supporting members.In some forms of the invention, locator prongs are provided on the connector for assisting the installer to attach the connector to the supporting board member. In its broadest form, however, no prongs are needed on the connector.In a preferred form of the connector, a projection is formed in the connector which bears against the underside of an adjacent structure even though the connector is not precisely installed.

Abstract: A resilient floor (A) is disclosed assembled on a base surface (10) to provide a resilient floor (36) which comprises a plurality of sub-floor sections (B) arranged generally side-by-side. A resilient layer of material (62) is carried generally co-extending underneath the sub-floor sections. A slot (38,74) and widened groove (40) accommodate a fastening member (51,71) which includes lateral flanges (58,60) and (78,80) which limit upward movement of sub-floor sections (B). Flooring strips (D) are nailed to the sub-floor sections so that the flooring strips move integrally together in relative vertical movements relative to the fastening strips (51,71). Resilient layer (62) urges sub-floor sections (B) and integral flooring strips (D) upwardly such that downward forces produced by activity on the floor (36) are provided with a degree of resiliency.

Abstract: There is disclosed a slab (10) adapted to be laid on a floor surface (11) in abutting relationship with like slabs to form an access floor. The slab has at least one channel (20) on its underside extending between edges thereof and adapted to be coincident with the channels of neighboring slabs to form an extended duct through which cabling and the like may be extended.

Abstract: A metal integral elevated post base for elevating the base of a wood post above a concrete base in which the post base is embedded. The post base includes a metal foot member embedded in the concrete base, a pair of metal post members integrally connected to the foot member partially embedded in and extending above the concrete base, and a pair of seat members integrally connected to the post members for supporting the wood post. Side members integrally connected to the seat members attach to the sides of the wood post. The post base is formed in two halves from a sheet metal blank and is configured as opposite halves and folded to form a single post and seat. Parts of the post base could be welded, but the preferred form is not welded.

Abstract: A floor (1) with built-in resilience which makes it suitable for use in different sports both indoors and outdoors. The resilient floor is built up of mutually parallel studs (3) with recesses extending in the transverse direction. In the recesses, fillets (5) are arranged which extend beyond the upper side of the studs (3) and support surface planks (6). The recesses which are mirror-symmetrically arranged about a center axis transversely of the respective stud (3) have at least one inclined wall, the walls of the recesses intended for the same fillet (5) and positioned in adjoining studs (3) being inclined in the opposite direction. The fillets (5) are clamped in a wave-like manner in the associated recesses, in that they engage the inclined walls.

Abstract: An acoustically insulating floor panel comprises a top board having an underside. Spacing laths are mounted on the underside of the top board. A layer of fibrous, mineral wool is glued on the top board underside between the spacing laths. The panel is adhered to an already existing, supporting floor through pads made of resilient, high density polyurethane foam, self adhesive on both sides thereof, and interposed between the laths and the supporting floor.

Abstract: A floor or walkway has a base and an overlay on the base. The overlay includes a plurality of prefabricated tiles each of which has an upper layer designed to contact objects on the floor or walkway and a lower layer designed to bear against the base. The upper layers are composed of a ceramic while the lower layers are composed of a resilient material having anti-skid characteristics. The upper and lower layers of each tile are adhesively secured or vulcanized to one another during manufacture of the tile. The overlay is formed by simply placing the tile on the base or loosely securing the tiles to the base by means of an adhesive. If the overlay is outdoors, the same or gaps between neighboring tiles are kept open to permit water runoff. The lower layers of the tiles are then formed with drainage channels and/or open pores for the discharge of water which has passed through the seams or gaps.

Abstract: Disclosed herein is a flooring system adapted to be laid on a rigid supporting slab, which system comprises an understructure resting on the supporting slab, and a floating floor assembly comprising a series of parallel and spaced apart steel strips resting on the understructure, a layer of plywood on the steel strips, a series of floor boards in abutting parallel relation to each other, extending transversely to the steel strips, and located on the plywood layer, and a plurality of fasteners extending through the floor boards, through the plywood layer, and through the steel strips.

Abstract: Disclosed herein is a flooring system comprising a foundation, a resilient layer overlying the foundation, a layer of resilient material overlying the resilient layer, a layer of rigid material including a channel overlying the layer of resilient material, an elongate laminated member disposed within the channel and secured to the layer of rigid material, a floorboard overlying the layer of rigid material and the laminated member, a fastener extending through the floorboard and into the laminated member to secure the floorboard to the layer of rigid material, and structure formed in the resilient layer for venting water vapor accumulating between the resilient layer and the foundation.

Abstract: A unitary blind locking device for prefabricated structure construction configured into a substantially rectangular shape for securely binding together pairs of suitable similar and/or dissimilar construction materials of similar and/or dissimilar thicknesses. It has a plurality of legs with end parts that are to be used for gripping the construction parts firmly together by means of the cleats or teeth punched out of an interfitting plate that is part of the lock itself and, for anchoring purposes, said lock being fabricated in various shapes and sizes and with accompanying wall lifting straps to meet the demands of workmen at the permanent construction site so as not to hamper their vision while erecting the permanent structure and also to allow the construction at the prefabrication site to proceed smoothly.

Abstract: A flooring system and a module for a flooring system made of a series of floor support modules each of which has a number of props in a grid matrix and joined together by an integral frame. Attachment means is provided to join the units to adjacent units and clamping plates are used to provide a positive location of a floor panel on the module. Services such as electricity, telephone and computer cables may be laid in the cavities or voids under the floor panel.

Abstract: A hardwood, free floating floor system has upper and lower subfloors of wooden panels with criss-cross kerf patterns formed in either their top or bottom surfaces, a plurality of elongated floorboards disposed above the upper subfloor, the floorboards having transverse kerfs cut in their bottom surfaces, and a plurality of uniformly spaced pads supporting the lower subfloor above a base. The combination of the subfloor kerf patterns, the floorboard kerfs, and the compressible, deflectable pads provides a free floating hardwood floor system which meets the difficult standards established by the Otto Graf Institut of West Germany for assessing a floor's ability to reduce injury and to provide highly consistent performance characteristics.

Abstract: A floating floor comprises a plurality of square buffer members arranged in parallel at regular intervals on a supporting structural floor, a plurality of floor panels vertically spaced above the supporting structural floor by the supporting members to form an air layer between them. The floor panels are respectively provided with a plurality of air holes through which the air layer is communicated with the outside of the floor panels. The floor panel may be a hollow panel having a plurality of cavities extending in parallel in the longitudinal direction of the panel and being opened at butt ends of the panel, each cavity being communicted with the air layer through said air holes to form passages from the air layer to the outside of the floor panel. Instead of square buffer members, there may be used square supporting members and a buffer layer so that the floor panels are vertically spaced above the buffer layer by square supporting members to form an air layer between them.

Abstract: For a sports or athletic floor having an upper playing surface on a subfloor over a solid base such as a cement slab or the like, the subfloor is supported only by a series of individual resilient shock-absorbing members uniformly located between the subfloor and the solid base to provide the requisite air space under the subfloor and to provide shock-absorbing and levelling of the sports floor.

Abstract: A flooring system which enables floors of enhanced sound insulation to be produced with minimal raising of floor level above that for a simple floor comprises inverted channel section floor supports mounted longitudinally on joists and having outwardly directed flanges. Sound isolating material is interposed between the floor supports and the joists, panel members are laid between the floor support flanges, and floor decking extends over the panel members and is secured to the floor supports. Where the floor supports, which may be of a standard width, are substantially wider than the joists, locating clips may be interposed between the supports of the joists. The system is advantageously used in conjunction with a resiliently supported ceiling.

Abstract: The spring is one piece and elliptical with the working material concentrated nearer the ends than the middle section, leaving the middle section available for deflection limiting stops and for fastening holes. A preferred material is acetal plastic. The spring can be machined, molded or cut from extrusions in widths to suit use requirements. The spring is attached to mounting structure by a fastener which passes through a hole in one leaf and is seated on the other.

Abstract: A portable cushioned floor system utilizes a modular construction in which each floor module is enclosed with a lower floor plate that protects the flexible resilient cushioning layer during transport and installation and after installation. The lower floor plate is attached to a floor-supporting upper plate with fasteners that maintain a maximum spacing yet permit full flexibility of the intermediate cushioning layer.

Abstract: A flooring system as disclosed which includes a substructure placed on an earth surface, which supports a floor structure. The substructure is composed of a plurality of longitudinally-extending I-beams interconnected by longitudinally-extending styrofoam blocks. A floor structure is connected to the substructure, the floor structure including flooring pieces having a long side and a short side. The flooring pieces are connected to the substructure so that the long sides extend transversely to the length of the I-beams. In an alternative embodiment, the I-beams include a support and location leg for connecting the styrofoam blocks. According to a method of the invention, the substructure and floor structure are interlocked by the criss-cross pattern described.

Abstract: A sleeper is disclosed comprising a guideway, a resilient strip, a nailing bed and a spring. The guideway is an elongated channel of C-shaped cross-section with three fully closed faces and a partially open face. A plurality of the guideways are fastened to the floor base and the resilient strips placed in the bottom of the guideways. The nailing bed is an elongated wooden element with an elongated protrusion. The nailing bed defines an inverted T-shaped cross-section and is placed in each guideway above the resilient strip. The protrusion of the nailing bed extends through the partially open face for attachment to the flooring material. The nailing bed is shorter than the guideway to leave sufficient room within the guideway at at least one end of the guideway for the spring. The spring is inserted with one end against the end of the nailing bed. The spring is then compressed and a stop inserted through the guideway to maintain the spring in the compressed condition.

Abstract: A floor structure comprises a flooring (10) situated on top of a first lower layer of joists (6) and a second upper layer of joists (8), said layers together forming a cross structure where the joists of the two layers extend perpendicular to one another. The two layers of joists are situated on top of chocking means (1). In order to obtain a good surface flexibility over the entire floor and consequently in order to make the floor structure suited as a sports floor, resilient spring elements (9) separating the two layers are situated at the intersections of the two layers of joists (6 and 8).

Abstract: A readjustable floor system permits cables of various sorts to be freely distributed therein and is capable of very flexibly coping with expansion and relocation of cables of various sorts already distributed. This system is constructed by forming unit members of an approximately U-shaped cross section each composed of a pair of floor member-supporting joists disposed parallelly on a floor surface in an opposed relation to each other across a fixed interval and a bottom plate laid to interconnect the lower parts of the joists, defining a space for distribution of cables and pipes inside the unit members, partitioning the space through an antistatic sheet, and detachably mounting unit floor boards one each on top of the unit members.