Abstract: A support layer for supporting an artificial turf assembly. The support layer being formed of a polymeric foam, preferably having a density of between 20 and 70 grams per liter, such as a polyolefin foam; and having an upper side and a lower side, wherein in use the support layer has been placed with the lower side thereof on a base surface and supports, on the upper side thereof, the artificial turf assembly, the support layer including a plurality of through drainage holes extending from the upper side to the lower side for allowing liquid such as rain water to flow via the plurality of drainage holes from the upper side to the lower side, and also including a plurality of channels at the lower side for allowing liquid such as rain water to flow through the channels along the lower side, wherein each of said plurality of drainage holes debouches into one of the plurality of channels.

Abstract: A material feed system for a paving machine includes a first sensor assembly, a second sensor assembly, and a controller configured to independently operate each of a left material feed mechanism and a right material feed mechanism with respect to one another and, selectively, in a first mode and a second mode. In the first mode, a speed of each of a left auger, a left conveyor, a right auger, and a right conveyor is automatically adjusted. In the second mode, the speed of at least one of the left auger, the left conveyor, the right auger, and the right conveyor is manually set by an operator input, one of the left material feed mechanism and the right material tied mechanism is operated in the first mode, and the other of the left material feed mechanism and the right material feed mechanism is simultaneously operated in the second mode.

Abstract: An operating arrangement for a construction machine comprises an operating device which comprises a touch-sensitive display for inputting operating instructions by an operator, and an operating mask with localization markers. The operating device comprises at least a first alignment feature for aligning the operating mask on the operating device in a pre-defined operating position relative to the operating device. The operating mask is detachably attached to the operating device in the operating position, wherein the operating mask at least partially covers the touch-sensitive display, and wherein the location markers of the operating mask lie over specified areas of the display and facilitate locating the specified areas of the display for inputting instructions.

Abstract: A striper can apply a polymer-based marking material comprised of a mixture of a material solution and a catalyst. The material solution and catalyst are mixed according to a desired ratio. A first pump drives the material solution and a second pump is slaved to the first pump and drives the catalyst. The second pump includes dual check valves within its piston, thereby ensuring that the second pump drives fluid during both its upstroke and its downstroke to maintain the desired ratio.

Abstract: The structural cable (10) comprises a bundle of load-bearing tendons (15) extending between upper and lower anchoring devices, a first sheath (20) containing the bundle of tendons, and a second sheath (22) arranged around the first sheath, with a gap between the first and second sheaths.

Abstract: The invention relates to a vacuum installation for industrial application, the installation comprising a first vessel having a first gas inlet for allowing a gaseous substance into the first vessel and a first outlet for depletion of a material, a second vessel having a second inlet for aspirating a quantity of material and a second gas outlet for depletion of the gaseous substance, wherein the gaseous substance comprises a vapour generated from the material, a storage chamber for storing the quantity of material, the storage chamber having a third inlet, wherein at least the first vessel communicates with an interior of the storage chamber via the first outlet and the third inlet; and a vacuum pump located in between the first vessel and the second vessel, and operated to lower the pressure in the second vessel, thereby allowing the material to be sucked into the second vessel via the second liquid inlet to an equilibrium level between the material and the gaseous substance, the vacuum pump being further ope

Abstract: A chute control assembly for a snow thrower having a housing, handle, and a chute includes a control mechanism, a connecting mechanism, and a guide mechanism. The control mechanism includes an actuator mechanism that allows an operator to manually control the orientation of the chute from a position spaced apart from the chute. The connecting mechanism transfers rotation of the actuator mechanism to the guide mechanism. The guide mechanism is attached to the chute and rotates and adjust the orientation of the chute in response to rotation of the actuator mechanism in order to change the direction that snow is thrown from the snow thrower.

Abstract: A housing for a snowthrower including an auger housing and an impeller housing. The auger housing may include a front portion and a rear portion protruding from a rear wall of the front portion. The impeller housing may be coupled to the auger housing at a rear-facing opening of the rear portion. At least a portion of the rear portion and the impeller housing form a bypass passage adapted to return snow that bypasses a discharge outlet. The snowthrower may also include an auger that includes a helical flyte adapted to collect snow. The helical flyte may include a first helical portion and a second helical portion, wherein the first helical portion is overlapping and coupled to the second helical portion.

Abstract: Disclosed is a method for guiding aquatic organisms. The method includes disposing a plurality of electrode units at a distance from one another in water; and applying an electrical pulse to at least one electrode unit of the plurality of electrode units to generate an electric field and/or a magnetic field around the at least one electrode unit to guide the aquatic organisms by stimulating the aquatic organisms with the generated electric and/or magnetic fields.

Abstract: A bio-friendly water flow control system can include a portable structure adapted to contain organic waste material. The water flow control system can be configured for deployment outdoors to guide water flow to limit erosion. A portable structure of such a system can include a sheath that is configured to contain waste material within an interior of the sheath. The portable structure may be configured to allow a flow of water into the interior of the sheath. The portable structure may include a waste material that includes processed palm frond particles. The portable structure may be configured to absorb a weight of water at least 50% greater than a dry weight of the portable structure.

Abstract: A method for foundation of a transformer platform having at least four piles (12), in which precisely one pile driver (1) is brought to the location, the pile driver (1) is supported on the seabed (9) by means of extendable supporting legs (7), driving jigs (11) are attached to the pile driver (1), the piles (12) are inserted through the associated driving jigs (11), the piles (12) are successively driven into the seabed (9) whilst maintaining the position of the pile driver (1), upper ends of the piles (12) driven into the seabed (9) are arranged level with or above the associated driving jig (11), the supporting legs (7) of the pile driver (1) are retracted and the pile driver (1) is moved away from the location.

Abstract: A pile maintenance method, system, and apparatus including a shell configured to be opened and closed longitudinally such that the shell forms a chamber between a length of a pile and an inner surface of the shell when the shell is closed around the pile, at least one fixing member configured to fix the shell to the pile such that the shell is substantially centered on the pile, at least one sealing member provided proximate a bottom of the shell and configured to form a substantially watertight seal at a bottom of the chamber, a plurality of nozzles provided inside the shell and configured to spray one or more media onto the pile, and a drain outlet provided proximate the bottom of the shell and configured to drain contents from the chamber formed by the shell.

Abstract: An apparatus and method for endwise connecting subterranean barrier members is disclosed. The apparatus includes at least two barrier members with each barrier member extending between top and bottom edges. Further, each barrier member has a side first edge having a flange defining a first connector and an opposed second side edge having a channel defining a second connector. The channel is sized and shaped to receive the flange of an adjacent barrier member in slidable interconnection therein. The apparatus further include a first side panel shaped to lie against a first side of the barrier members, a second side panel shaped to lie against a second side of the barrier members and a bridging plate located between the first and second panel members so as to bridge a gap therebetween, wherein the gap has a width corresponding to a width of the first and second barrier members. The associated method is directed toward creating the apparatus.

Abstract: Disclosed embodiments include post driving implements which attach to a power machine such as a loader in order to pick up posts of various sizes and materials and/or to drive the posts into the ground. In some exemplary disclosed embodiments, the post driving implement allows a post to be picked up when positioned inline with a direction of power machine travel and allows the post to rotate under the force of gravity to a second position in which the post is inline with a pounding mechanism for pounding the post into the ground. Catch mechanisms can be included to capture a portion of the implement to maintain the post in the second position until a release action is taken or a release command is given.

Abstract: The present invention relates to an attachment for drilling and/or foundation work, in particular a casing oscillator or casing rotator, comprising a receiving apparatus for clamping at least one pipe and a drive for generating a rotational movement of the clamped pipe, wherein the attachment comprises at least one integral control unit for an independent carrying out of control functions of the attachment.

Abstract: The present invention relates to a method of power management during pile foundation having a base machine for excavating a borehole and an attachment installed at the base machine for a simultaneous introduction of a casing into the ground, wherein the energy supply for the attachment is at least partially provided by the base machine and a control of the base machine dynamically regulates the energy flow from the base machine to the attachment.

Abstract: An erosion control apparatus is disclosed herein comprising a filtering member defining a looped portion; a guide member positioned within the looped portion of the filtering member; and a support member insertable in the looped portion of the filtering member. The guide member facilitates insertion of the support member into the looped portion of the filtering member.

Abstract: An apparatus for freezing ground comprises a freezing head extending along a longitudinal axis, and a first conduit for introducing a first cooling medium or a second cooling medium different therefrom into an interior of the freezing head. The first conduit opens into the interior a second conduit introduces the second cooling medium into the interior of the freezing head or draws the first and/or the second cooling medium off from the interior of the freezing head. The second conduit opens into the interior of the freezing head, the apparatus has at least three separate connections, namely a first connection, via which the first cooling medium can be introduced into the interior of the freezing head, a second connection, via which the second cooling medium can be introduced into the interior of the freezing head, and a third connection, via which the first or the second cooling means can be drawn off from the interior of the freezing head.

Abstract: An offshore platform with at least one pile of a pile foundation with an outer wall having an external diameter and with a tube (8, 12) with an inner wall having an internal diameter which is greater than the external diameter, on the exterior of which attachments are arranged, and which is slid over the pile (2, 3) driven into the seabed (4), wherein at least one spacer (20) is provided between the outer wall of the pile (2, 3) and the inner wall of the tube (8, 12).

Abstract: A method for manufacturing modular retaining wall blocks in natural stone, wherein the blocks are trapezoidal blocks having top and bottom surfaces with channels that receive offset connectors in multiple orientations for building upright, offset, and curved walls. Stone from a quarry is cut or split to form substantially rectangular elongate blocks having top and bottom surfaces, opposed side faces, and opposed ends. A series of channels running parallel to the side faces is cut in each of the surfaces, the top channels lying across from the bottom channels but offset therefrom. The elongate blocks are then cut between opposing pairs of channels to form trapezoidal blocks having front and rear faces.

Abstract: A work machine includes a mechanical arm and a work implement coupled to the mechanical arm. The work implement is configured to receive a load. A hydraulic actuator is coupled to the mechanical arm to move the arm between a first position and a second position. A sensor unit is configured to detect the load in the work implement. A valve is in fluid communication with the hydraulic actuator for supplying a fluid output to the hydraulic actuator. A controller is in communication with the value and the sensor unit. The controller is configured to transmit a control signal to the valve to adjust the fluid output to the hydraulic actuator, and wherein the controller is configured to derate the fluid output in response to a signal from the sensor unit that a load is at or above a threshold value.

Abstract: A work machine includes a mechanical arm. A work implement is coupled to the mechanical arm to receive a load. A hydraulic actuator moves the arm between a lower position and an upper position, wherein a distance between the lower position and the upper position is a travel distance of the mechanical arm. A sensor unit is configured to sense the load in the work implement. A valve is in fluid communication with the hydraulic actuator for supplying a fluid output to the hydraulic actuator. A controller is in communication with the valve and the sensor unit. The controller is configured to transmit a control signal to the valve to adjust the fluid output to the hydraulic actuator. The controller is also configured to adjust the upper position to reduce the travel distance in response to the load being at or above a threshold value.

Abstract: A method of controlling hydraulic fluid flow to an implement of a material handling vehicle includes coupling a boom arm to a vehicle frame for rotation about the vehicle frame, rotating a boom arm with respect to the vehicle frame with an actuator, coupling an attachment to the boom arm for rotation with respect to the boom arm, sensing a pressure of fluid in the actuator, communicating the sensed pressure to a control system, determining a baseline pressure of the attachment based upon the sensed pressure of the fluid in the actuator, and limiting fluid flow to the actuator with a control valve in response to the sensed pressure of the fluid in the actuator being above the baseline pressure.

Abstract: A vehicle for producing trenches in the ground is provided. The vehicle generally includes a chassis having a motor unit, a controllable digging device mounted on the chassis to dig a trench, and a controllable suctioning and collecting device configured to suction and collect rubble produced during the digging of the trench. The vehicle may include a driver station for the movement on the ground of the vehicle during a transfer phase, and a portable and remote control unit configured to enable an operator to remotely control the digging device, the suctioning and collecting device, and the advancing of the vehicle during digging in the course of a working phase.

Abstract: A work machine includes systems and methods for stability control and for calibrating the stability control. During operation the load on a work implement is detected and it is determined if the load is at or above a threshold value. A derated fluid output is determined if the load is at or above the threshold value. A control signal is output to the valve based on the derated fluid output. During calibration the pressure in a hydraulic cylinder is detected at one or more locations as a mechanical arm moves between a lower position and an upper position. One or more baseline values are established for the mechanical arm between the lower position and the upper position.

Abstract: A control system for a material handling vehicle has a boom arm connected to a vehicle frame for rotation about the vehicle frame. An actuator is connected to the vehicle frame and the boom arm to cause the boom arm to rotate about the vehicle frame, and an attachment is connected to the boom arm for rotation with respect to the boom arm. The control system includes a controller that is configured to calculate a pre-determined acceleration limit of the attachment, and a sensor that senses acceleration of the attachment and communicate the sensed acceleration to the controller. The controller is configured to compare the pre-determined acceleration limit of the attachment to the sensed acceleration of the attachment and is configured to adjust a control valve to limit flow to the actuator in response to the sensed acceleration of the attachment being above the pre-determined acceleration upper limit.

Abstract: A method of controlling hydraulic fluid flow to a material handling vehicle implement includes coupling a boom arm to a vehicle frame for rotation about the vehicle frame, rotating a boom arm with respect to the vehicle frame with a first actuator, coupling an attachment to the boom arm for rotation with respect to the boom arm, rotating the attachment with respect to the boom arm with a second actuator, sensing a velocity of the attachment, communicating the sensed velocity to a control system, sensing a weight of the attachment, communicating the sensed weight to the control system, calculating a kinetic energy of the attachment based upon the sensed velocity and the sensed weight of the attachment, and adjusting fluid flow through the control valve to limit a range of movement of the attachment in response to the calculated kinetic energy of the attachment exceeding a pre-determined kinetic energy.

Abstract: The tooth adapter partly inserted into a cavity formed in a tooth to hold the tooth with respect to a bucket body includes a connection portion including a proximal end, which is an end of the tooth adapter connected to the bucket body, and an insertion portion including a distal end, which is an end of the tooth adapter inserted into the cavity. The insertion portion includes a base, and a high-hardness portion formed in a region including a surface of the insertion portion, the high-hardness portion being higher in hardness than the base.

Abstract: Various embodiments include a device for extracting water from a humid gas mixture at a first temperature comprising: a compressor to compress the mixture from a first pressure to a second pressure at which the dew point of the mixture lies above the first temperature; a pressure vessel receiving the mixture at the second pressure and condensing out a first fraction of water; a pressure exchanger operable to transfer the second pressure from the gas mixture after removing the first fraction of water to a fresh feed of the gas mixture; and lines connecting the pressure exchanger and the pressure vessel in such a way that the fresh feed at the second pressure can be guided from the pressure exchanger into the pressure vessel, and the gas mixture with the reduced water content can be guided from the pressure vessel into the pressure exchanger.

Abstract: A faucet includes a base, a spout, a water level sensor, and a controller. The spout is coupled to the base and includes a first portion proximate to the base and a second portion adjustable relative to the first portion. The second portion includes a water outlet. The water level sensor is disposed on the second portion, and is configured to detect a distance between the water outlet and a level of water in a container disposed below the water outlet. The controller is configured to control the flow of water through the water outlet based on the detected distance between the water outlet and the level of water.

Abstract: Water tap (2) or water valve assembly is provided which has biometric recognition means (20) provided on or associated with the same. The biometric recognition means (20) are arranged such that operation of the water tap (2) or water valve assembly and/or operation of one or more functions of the water tap (2) or water valve assembly takes place only upon recognition or a positive match of one or more biometric features of a user.

Abstract: A fluid delivery apparatus includes a spout, an active sensor, and a passive sensor. The active sensor is configured to detect the presence of a user adjacent the spout when enabled. The passive sensor is configured to define a sensing field in an area near the spout and also to detect a presence of a user. A controller is coupled to the passive sensor and the active sensor. The controller is programmed to detect the presence of a user in the sensing field based on an output signal from the active sensor in response to detecting the presence of the user in the sensing field with the passive sensor, thereby reducing the amount of power used by the active sensor.

Abstract: A connector for use with a disposable flexible liner installed in a spa basin is provided to bridge between an overflow opening provided in the liner and an overflow aperture provided in an upright wall of the basin, so that when the soaking solution containable in an interior volume of the basin exceeds a prescribed height, the soaking solution is enabled to drain out of the interior volume through the liner at the communicated openings/apertures. A conduit formed by the connector for insertion into the basin to bridge between the communicated openings/apertures is arranged for a friction fit in an overflow throat extending from the overflow aperture defined in the basin.

Abstract: A drain sieve for a washbasin catches foreign objects with a specified minimum size. The drain sieve has an annular support surface to be supported on the washbasin in the region of a drain of the washbasin and a closed curved surface which lies below the support surface in the assembled state. A distance between the curved surface and the support surface depends on the size of the foreign bodies to be caught, and the drain sieve is configured such that the curved surface of the drain sieve is curved upwards in the assembled state. Openings for the outflow of the water are arranged between the outer lower edge of the curved surface and the support surface of the drain sieve.

Abstract: In order to create a sink attachment for arranging on a sink, comprising a coupling device for coupling the sink attachment to a coupling sidewall of a basin of the sink in a working position, which can be easily and stably positioned without multiple horizontal supporting faces having to be formed at the same height on the sink or on a work surface on which the sink is arranged, and without the functionality of the sink attachment or of the sink being limited, it is proposed that the coupling device comprises an inner coupling element that is configured to be seated, in the working position, onto the inner side of the coupling side wall facing the interior of the basin, and comprises an outer coupling element that is configured to be seated, in the working position, onto an outer side of the coupling side wall facing away from the interior of the basin.

Abstract: This invention relates to a cistem (1010): More specifically, the invention relates primarily to concealed cisterns for toilets having integrated, and preferably adjustable, dual-flushing and odour extraction capability. The cistem (1010) includes a primary chamber (1020) for storing a volume of liquid, a liquid inlet (1026) for the primary chamber (1020) of the cistem (1010) with liquid, an air outlet (1028) for exhausting air from the primary chamber (1020) of the cistem (1010) operatively during filling; and a liquid outlet (30) through which liquid operatively stowed in the primary chamber (1020) of the cistem is dischargeable. The cistem (1010) further includes a fill valve for controlling liquid supply into the primary chamber from the liquid inlet (1026) and a flush valve (60) for controlling flow through the liquid outlet (30).

Abstract: A flush toilet includes a bowl, a tank coupled to the bowl, a flush valve positioned within the tank, and a flush device configured to initiate a flush cycle. The automatic toilet further comprises an electronic sensing assembly having a sensing member positioned on the bowl for detecting an overflow condition of the bowl, an overflow device operably coupled to the flush device, and a controller in electronic communication with the electronic sensing assembly and the overflow device for controlling the flush device in response to a condition of the toilet.

Abstract: A urinal assembly having a frame and a plurality of posts or posts extending from the frame. The frame can include a plurality of openings. The openings can be defined by a plurality of sides and corners. The posts can extend from the corners and/or from the sides of the openings. In some embodiments, posts extend from a first face and a second face of the frame.

Abstract: A sewer drain elevation assembly includes a sewer drain that is embedded into a roadway. A grate is removably positionable on the sewer drain to inhibit debris from passing through the sewer drain. The grate would be spaced downwardly from a resurfaced driving surface of the roadway after the roadway is resurfaced thereby posing a hazard to traffic and pedestrians. A pair of inserts is provided and each of the inserts is positionable between the grate and the sewer drain after the roadway is resurfaced. Thus, each of the inserts lifts the grate to align the grate with the resurfaced driving surface of the roadway after the roadway is resurfaced.

Abstract: An affordable Zero-Energy prefabricated modular building such as for housing, in which a Layered disposition of Envelope elements—including Structural Insulated Panels—in the wall, floor and roof sections of the building's thermal Envelope, provide a highly energy-efficient Building Envelope, which together with a modular building Support Structure including Aeriated Frames, and an adequately sized renewable energy power generator system, inexpensively achieves the energetic independence of the building. A method is disclosed for the adaptation of the building's design and construction to the bio-climatic conditions of its projected location, in which different possible configurations of the relevant elements of the Building Envelope, the building structure and the renewable power generator system are evaluated, discarding those configurations which don't meet the defined acceptable criteria for energy-efficiency, thermal isolation and water condensation risks.

Abstract: A first constituent member constructed such that at least portions of a plurality of panels overlap and a second constituent member constructed such that at least portions of a plurality of panels overlap are included, in which the first constituent member and the second constituent member are connected to a link member that can be expanded and contracted, the first constituent member and the second constituent member are expanded and contracted by expansion and contraction of the link member, and the first constituent member and the second constituent member can relatively be rotated around rotation axes.

Abstract: A first constituent member configured such that a plurality of panels overlaps and a second constituent member configured such that a plurality of panels overlaps are included, in which a first link member that can be expanded and contracted is connected to the first constituent member, a second link member that can be expanded and contracted is connected to the second constituent member, each of the constituent members can be expanded and contracted by expansion and contraction of each of the link members, the first constituent member and the second constituent member can relatively be rotated around rotation axes and also can removably be connected, the first link member and the second link member are connected to both ends of connecting link arm members via a free joint respectively, and the first link member and the second link member can be separated from each other.

Abstract: A laminated building sheathing (20) comprising a rigid foam board (22) and a vapor-permeable film facer (24). The vapor-permeable film facer (24) is adhered to the rigid foam board (22) by an adhesive (26) at non-continuous adhesive locations. The film facer (24) is vapor-permeable, and an extent of non-continuity of the adhesive with respect to area of the rigid foam board is controlled to provide a desired balance between (1) sufficient vapor permeability to conduct vapor to the exterior of the sheathing and (2) a minimum surface area required to effect sufficient adhesion of the film facer to the rigid foam board. In another of its example aspects, a laminated building sheathing comprises a rigid foam board, the rigid foam board comprising a first major surface and a second major surface parallel to the first major surface. The first major surface is configured for being covered by cladding; the second major surface is configured for contact with a building.

Abstract: An insulation system and method comprising an insulation layer, an atmospheric regulation layer, a structural support, and an external surface; wherein the atmospheric regulation layer is supported by the structural support, wherein the insulation layer is located between the atmospheric regulation layer and the external surface, wherein the atmospheric regulation layer has a water vapor permeability of not greater than 3 perms at a relative humidity of 25% as measured by ASTM E96 Procedure A Dry Cup, and a water vapor permeability of at least 6 perms at a relative humidity of 75% as measured by ASTM E96 Procedure B Wet Cup, wherein the atmospheric regulation layer has a fire class A rating as measured by ASTM E84, and wherein the continuous atmospheric regulation layer has a ACH50 value of not greater than 10, wherein ACH50 represents an air exchange at 50 Pascals.

Abstract: An intumescent mesh has a flexible grid with a plurality of strands that form a series of openings in the flexible grid, and an intumescent coating applied to the flexible grid. The intumescent coating is made of an expandable graphite and a polymer-based carrier as ingredients and having an activation temperature above which the intumescent coating swells. The grid is sized such that the intumescent coating permits airflow through the flexible grid until the intumescent coating is exposed to temperatures at or above the activation temperature, whereupon the intumescent coating swells to seal the openings and prevent air flow through the flexible grid.

Abstract: A containment system may include four different widths of panel assemblies, at least four different types of corner assemblies, various types of door assemblies, multiple types of three-way corners or ‘T’ intersections, multiple types of exhaust panel assemblies, multiple types of wall seal assemblies, and other components that form a modular system capable of adapting to various configurations using a minimal number of fasteners, brackets, and/or clamps. Each panel assembly includes a lower assembly, an upper assembly slideably attached to the lower assembly, at least one adjustment mechanism that interfaces with both the lower assembly and the upper assembly, and a sealing member extending between the upper assembly and the lower assembly.

Abstract: Disclosed is a clip and method of mounting a furring channel to a load bearing member of a drywall grid system. The load bearing member includes an elongated web having an enlarged upper portion and a lower portion from which a pair of coplanar flanges projecting outward. The clip includes a bottom wall and an end wall from which two hanger hooks project upward. Each hanger hook includes a folded over portion configured to snap-fit and entrap a portion of the enlarged upper portion of the load bearing member, with the bottom wall being disposed on one of flanges of the load bearing member. A second clip is mounted on the load bearing member in a similar manner so that its bottom wall is disposed on the other of the flanges of the load bearing member, and with the hanger hooks of the two clips being interposed. A respective furring channel is mounted on each of the clip to be supported thereby.

Abstract: An improved lath is disclosed having a water drainage layer provided in association with the lath. The water drainage layer serves to remove water that might otherwise build up between the lath and wall structure.

Abstract: The disclosure relates to support members for ceiling systems, such as those that can be formed into an interconnected grid to be suspended from a ceiling and support ceiling tiles. One aspect of the disclosure is a linearly-extending support member for a ceiling tile.

Abstract: A floor mat puzzle, forming a non-rectangular isometric polygonal mat, has a plurality of edges and a same number of corners as the edges, each corner disposed between two edges. Each edge has at least one engaging protrusion and at least one concavity, each edge further has a first corner protrusion and a second corner protrusion at two corners, and a corresponding first corner concavity and a corresponding second corner concavity provided respectively adjacent to the first corner protrusion and the second corner protrusion.