Abstract: An inspection chamber has a plastic sleeve as well as a plastic base attached to the sleeve and provided with at least two openings to which a pipe can in each case be attached, which plastic base has a flow profile which extends between the openings, and is made up of at least two separate base parts which, at the edges thereof facing towards each other, are fixedly attached to one another by means of a joining technique, such as gluing, welding and/or pop rivets. The flow profile has a rotational symmetry about a central axis which is oriented in the longitudinal direction of the sleeve.

Abstract: The invention relates to a security manhole that is secured to the mouth of an underground pipe (4) including an edge (2) and a hinged cover (5) having rising cylinders (6), a peripheral sealing gasket (30) being provided for. The cover (5) includes an opening provided with a screw fixed lid (8), one of the screws compresses a first electrical contact (9) sending a warning signal to a control centre. Underneath the lid is provided a turning part (10) pulling in an angular fashion a closing handle (14) provided onto the edge. In the closed position, said handle (14) is located on top of the plate (18) integral with said edge (5), both having an access ramp providing automatic pre-closing. The closing position is provided through a second electrical contact (19). In the opening position, the closing handle (14) is retained by retention pawl (15) hinged to the edge (2). Release is provided through a screw (21) fixed to the cover (5) upon contact with said retention pawl (15).

Abstract: A lightweight plastic cover for an electric handhole or pullbox having a plurality of vertical channels in a circular array at a radius about halfway from the center to the circumference. The channels allow the cover to bend when a large weight is applied and to rebound when the weight is removed. The cover may also have a second circle of vertical channels for strength nearer the center and horizontal channels crossing the center for added strength. The cover has a metal plate attached in the center for finding the cover with a metal detector and may also have a GPS device for locating it. The electric handhole or pullbox may have an open bottom portion with a ledge around the circumference for helping to set and maintain the electric handhole or pullbox at a desired depth. The cover may have extendable handles for ease of holding.

Abstract: An expansion ring assembly and method for sealingly installing a gasket within an opening in a wall of a structure. The expansion ring assembly includes an expansion ring having first and second adjacent end portions, and first and second cam members are rotatably coupled to the first and second end portions. Each cam member includes tool engagement structure for rotating the cam members, and cam surfaces of the cam members are engageable with one another such that, upon rotation of each cam member, the cam surface thereof engages the cam surface of the other cam member to drive the first and second end portions of the ring apart from one another, thereby radially expanding the ring to compress a gasket into sealing engagement with the wall opening. Only one cam member may be rotated, or alternatively, both cam members may be rotated sequentially, depending upon the amount of expansion which is needed.

Abstract: A crawl space access device is capable of being placed in a below grade level crawl space entry pit, and mating with the below grade opening in a building wall. The crawl space access device includes a body member having a base portion restable on a horizontal surface of the pit. A side wall portion extends generally perpendicular to the base portion. The side wall portion includes a side wall opening matable with the below grade opening.

Abstract: A ceiling hatch employs a frame having an upper edge and a lower edge and a passage bounded by a sidewall passing therebetween, the passage extending from the lower edge to the upper edge and having its minimum cross section at the lower edge. This frame is employed with an insulating block bounded by a top surface, a bottom surface and a side surface, and which is configured to be positionable substantially within the passage and substantially filling the same. A hinge attaches the frame to the insulating block, providing pivotable action between the insulating block and the frame about a pivot axis and allowing the insulating block to be swung out of the passage on an interference-free path such that the bottom surface of the insulating block is in a horizontal plane when the insulating block resides substantially within the passage.

Abstract: The invention relates to a lid for a shaft cover, comprising a cover body (12) and at least one locking means (20) arranged on the body of the lid (12), said locking means comprising a spring section (21-24) and an engaging section (26) which can be placed into contact with one part (36) of the frame (30) and arranged thereon. The invention is characterised in that the spring section (21-24) is respectively secured by both ends thereof to the body of the lid (12), is separated from the body of the lid (12) and the engaging section (26) is arranged between the two ends of the spring section (21-24).

Abstract: A template for temporary placement on the open upper end of a below-ground structure, including a rectangular body matching key dimensions of a permanent ground-level member to be installed, the body having an open bottom to engage the open upper end of the below-ground structure, a raised top surface, a back road-edge portion on one side of the body, and upright sidewalls. A method for using the template to facilitate adjustment of positioning of below-ground structures on which permanent ground-level members will be installed, the method involving placing, removing and re-placing the template while determining and adjusting positioning of the below-ground structure.

Abstract: This frame (2) comprises a bottom plate (22) which has a base (26) which defines a frame support surface (28) which is directed towards an inner side (I) and a skirt (20) which is intended to receive a covering element (4) and which defines an outer side (E). The bottom plate (22) comprises at least one cell (32) which is open towards the inner side (I).

Abstract: A template for temporary placement on the open upper end of a below-ground structure, including a body matching key dimensions of a permanent ground-level member to be installed, the body having an open bottom to engage the open upper end of the below-ground structure, a raised top surface, and an upright sidewall. A method for using the template to facilitate adjustment of positioning of below-ground structures on which permanent ground-level members will be installed, the method involving placing, removing and re-placing the template while determining and adjusting positioning of the below-ground structure.

Abstract: A subsurface aircraft servicing pit is provided with a hold down assembly that secures a pit lid mounting frame in position on a bearing seat at the top of a prefabricated pit enclosure. A frame mount latch ring is suspended in spaced relation beneath the underside of the pit lid mounting frame and inwardly from the walls of the pit enclosure. At least a pair of frame mount latches are provided on opposite sides of the pit. The latches have bases secured to the pit walls and hooks that extend over the top of the frame mount latch ring. The frame mount latches are constructed so as to exert a downward force on the frame mount latch ring, thus holding the peripheral margin of the pit lid mounting frame tightly against a peripheral bearing seat surrounding the pit opening. The necessary force exerted by the frame mount latches may be provided by a coil spring located within the structure of each frame mount latch.

Abstract: A cover system for septic tanks adapted to be attached to the a septic tank and provide access for repair and maintenance. The assembly includes a base which is embedded into the concrete and provides a seal between the concrete and the base. A pipe member is joined to and sits atop the stationary base member. A wrap made of high density polyethylene surrounds the pipe and covers its corrugations to reduce outside forces upon the pipe. Finally, there is a top cover which is designed to engage the top of the pipe. Additionally, a channel is provided to catch the edge of the pipe and a seal is provided to prevent leakage between the pipe and cover.

Abstract: A hatch cover with spring assembly to assist in lifting open the hatch cover lid. The lid is hinged to a frame so it can be rotated about the hinge to an open position. A spring or a pair of springs are attached to the underside of the lid. Each spring is a torsion spring having one arm selectively attached to the lid, and another arm in sliding contact with the frame. For ease of repair or replacement, the spring is attached only to the lid. In addition, attaching the spring to the lid allows the spring to retract when the lid is opened. The method for assembling the hatch includes the step of selectively attaching the spring to the lid underside. This step may be performed when the lid is detached from the frame.

Abstract: A method and a device for safely and efficiently adjusting the height of a manhole freely allowing the addition and removal of a height adjusting member at any position. The method and device may be used for the manhole formed by installing a tubular shaped frame in the ground, installing the removable height adjustment members on the tubular shaped frame, and installing a cover receiving frame on the height adjusting members. In this method and device, a frame is disposed in the upper space of the manhole; the cover receiving frame is raised by the height adjusting member installed on the frame; and the height adjusting members positioned under the cover receiving frame in that state are added or removed.

Abstract: A manhole access way security apparatus and method for using the security apparatus are disclosed. The security apparatus includes an insert, at least one locking pin and a locking mechanism each interconnected to allow users to easily and quickly install a security barrier under a manhole, handhole or vault, and thereby prevent authorized access through the manhole, handhole or vault. The apparatus uses an insert that may either sit on the existing manhole frame rim under the manhole cover, or if there is insufficient clearance on the manhole frame rim, brackets may be installed under the manhole frame upon which the insert rests. In either configuration, the insert is secured in place under the manhole cover by one or more locking pins that extend radially through the insert and are then locked to the insert.

Abstract: A matter-isolating system for use in combination with an underground storage tank assembly comprises primary and secondary spillage containment assemblies and a double-walled manhole assembly. The manhole assembly comprises a manhole lid, an outer skirt wall, and an inner skirt wall. The inner skirt wall defines an inner manhole cavity and an outer manhole channel. The outer manhole channel directs moisture from the lid to certain backfill material thus isolating the inner manhole cavity from channel-directed moisture. The spillage containment assemblies form concentric primary and secondary spillage-containing chambers in radial adjacency to a tank access conduit of the underground tank assembly. The inner manhole cavity functions to isolate the secondary spillage containment chamber from the outer manhole channel and the primary spillage containment chamber isolates the secondary spillage containment chamber from the tank access conduit.

Abstract: A concrete lid for an in-ground utilities box includes a plastic reinforcement structure filled with concrete. The plastic reinforcement structure includes one or more plastic sidewalls that protect the edges of the lid from damage. The upper and lower surfaces of the lid are exposed concrete (with the exception of the upper and lower edges of the one or more plastic sidewalls). The one or more plastic sidewalls laterally surround a plastic reinforcement grid, which is centrally located between the upper and lower edges of the one or more plastic sidewalls. The one or more plastic sidewalls can be integrally formed with the plastic reinforcement grid. The plastic reinforcement grid reinforces the concrete lid, eliminating the need for separate reinforcement material. Support struts can be used to support the plastic reinforcement grid while wet concrete is being poured into the plastic reinforcing structure.

Abstract: A form suitable for use in an underground storage tank installation includes an upper portion sized and shaped to receive a street box and a lower portion that fits over and surrounds an upper portion of a riser on the tank. In preferred embodiments, the riser acts as a containment sump, a portion of the riser sidewall is double walled, and the bottom of the lower portion of the form extends to a depth below the top of the double walled portion of the riser. Preferably, the cross sectional shape of the form is circular and the bottom of the riser's lower portion is outwardly flanged, which serves to support the form during installation operations. The form has a stepped structure, with the upper portion of the form having a smaller circumference than the lower portion and a transition between the upper and lower portions forming the step.

Abstract: The invention relates to a device and method for sealing a manhole structure. An elastomeric band with at least two different peripheries is sealingly engaged to at least two corresponding peripheries of the manhole structure. Adhesives and supplemental retaining bands may also be used to secure the elastomeric band to the manhole structure.

Abstract: A manway lift device comprises two hinge assemblies, each hinge assembly comprising a first hinge member, a second hinge member, a smooth bore bushing, an internally threaded bushing and an adjustable biasing assembly. At least one of the bushings of each hinge assembly including a first end protruding beyond an exterior face of the first hinge member of the hinge assembly and including a second end having dogs disposed thereon, the dogs engaged in dog holes disposed through the second hinge member of the hinge assembly. The smooth bore bushing of each hinge assembly receiving a bolt through the internal bore thereof, the bolt threaded received in the internally threaded bore of the threaded bushing of the hinge assembly. The bolts rigidly affix the bushings to the hinge assemblies. Each hinge assembly connected to a manway cover and a manway collar. The biasing assemblies biasing the manway cover toward an open position with respect to the manway collar.

Abstract: Existing street sewers consist of an immobile concrete structure supporting a frame. The present invention, the self-leveling street sewer, comprises a frame that floats on the foundation of the street and a tubular section that is connected to the connecting conduit. Since the frame is supported only by the street foundation, the immobile concrete structure is no longer required.

Abstract: An apparatus for adjusting the height and inclination of roadway and greenway appurtenances includes a rigid annular support ring mountable onto a rigid annular spacer ring sized so as to be mountable onto a manhole and a manhole frame mountable onto the support ring. The manhole frame is substantially frusto-conically shaped. A rigid annular base flange may be mounted around a base end of the manhole frame. A plurality of threaded bores are formed in spaced array around the base flange. Rigid elongate threaded members are threadably mountable into the threaded bores so as to be selectively threadably adjustable in the threaded bores and so as to protrude downwardly from the base flange into engagement, beneath the manhole frame, with a top surface of the support ring when the manhole frame is mounted on the support ring. The threaded members are threadably adjustable in the threaded bores to elevate or to tilt the manhole frame relative to the support ring.

Abstract: A device prevents water from leaking into a manhole. The device includes a body having first and second portions that are integrally formed. The first portion extends along and above a periphery of the opening of the manhole and the second portion extends upwardly from the first portion and provides access to the opening of the manhole. Preferably, the first portion includes a downwardly extending lip disposed along an outer vertical surface of the manhole. In addition, a cap is positionable on the second portion to prevent water entering the manhole from the manhole's opening.

Abstract: A stackable riser having a single side wall having a first open end defined by an edge and a second open channel end. A plurality of risers can be stacked on top of one another. The channel end of a riser mates with the first open end of a second riser. The riser includes a plurality of bosses and ribs connected to an interior surface of the sidewall to the edge of the first open end. A channel, on the channel end of one riser is adapted to receive the bosses and ribs of an adjacent riser.

Abstract: A manhole base or liner for directing the flow of liquid from a manhole inlet opening positioned in one of a plurality of possible locations in a manhole side wall to a manhole outlet opening in the manhole side wall, and a manhole having the base or liner. The base or liner includes a perimeter, an upper surface extending to the perimeter; and a liquid flow path formed in the upper surface.

Abstract: Method of replacing a blind flange manhole cover of the type including a bolted on blind flange mounted on a bolting flange of a negative pressure storage tank manway with a manhole cover having a hinged door assembly includes the step of removing the blind flange manhole cover from the bolting flange of a tank-installed manway. The manhole cover may be attached to the bolting flange of the existing manway. A seal may be provided for creating a leakproof joint between the cover and a cover receiving surface when the hingedly attached manhole cover is in a closed position. A manway having a hingedly attached manhole cover may be provided with a hinge frame. A locking assembly may be provided adjacent the cover that includes a locking and sealing element for engaging the cover with a seal for locking and sealing the manway.

Abstract: An adjustment riser is disposed between a manhole and a frame embedded in the paved surface of a roadway. The adjustment riser includes an annular concrete base which includes substantially flat top and bottom surfaces. A ridge and a groove are formed on the top and bottom surfaces, respectively, of the base to facilitate in the stacking of multiple risers and to prevent water infiltration. The adjustment riser additionally includes a plurality of adjustable support assemblies for supporting the frame. Each support assembly includes a support which extends axially within a corresponding bore formed in the base. Each support includes an enlarged head shaped to support the frame, the vertical position of the head of the support relative to the top surface of the base being continuously adjustable. In this manner, the adjustable nature of each support enables riser to hold the frame in its proper orientation relative to the paved surface.

Abstract: A roof scuttle safety railing system is provided for an existing or new roof scuttle which railing may be installed on the roof scuttle by unskilled labor without compromising the integrity of the weather seal of the roof scuttle. In one embodiment, pivotal corner brackets are secured to the capflashing of a roof scuttle with the vertical members of the safety railing being inserted in openings in the brackets. In another embodiment, an elongated bracket is used along two opposed sides of the roof scuttle which brackets are firmly held against the outside walls of the roof scuttle by tie rods, a strap or a cable. The elongated bracket has vertical openings at its distal ends for securing the vertical members of the safety railing and horizontal openings or slots for the tie rods, straps or cables. A hinged gate is also provided which preferably has a self-closing hinge.

Abstract: In accordance with the present invention there is provided an insert for placement in a mold for forming a concrete jar to form holes in the interior of the concrete jar for receiving steps and a method for forming holes in the interior of a concrete jar or manhole casing for receiving steps to enable a worker to climb into and out of said concrete jar or manhole casing, the insert including two hollow tubular anchors, each of the anchors having a first end and a second end, each of the anchors being equal in length, a rigid frame connected to the first end of each of the two anchors, the frame having a front side and a back side, the two hollow anchors extending from the front side of the frame, the anchors being parallel to each other, and the anchors being closed at the first end and open at the second end.

Abstract: A floating cover or roof having a plurality of floating panels or panels is provided. The floating cover disposed in a storage tank includes a frame having a plurality of openings, the floating panels mounted into the respective openings, an inspection port formed on an upper member of the floating panel and communicated with an inside of the floating panel. The inspection port provides for inspection for the presence of moisture, vapor, and condensate trapped in the inside of each of the floating panels without disassembly of adjacent floating panels, and also provides for the replacement of a damaged or degraded one among the floating panels without taking the internal floating roof out of the storage tank.

Abstract: Cover apparatus for temporarily covering access openings for water, drain, manhole and overflow pipes when the access openings are exposed, such as during construction, to prevent dirt, dust or unauthorized access to the access openings includes a top portion which extends outwardly beyond the access opening, an outer depending side wall which fits within the access opening, an outwardly flared lower side wall which extends below the outer depending side wall, a central cylindrical wall depending from the top portion in spaced relation from the depending side wall, and a plurality of ribs extending between the central wall and the depending side wall. A pump is secured within the central ring, and an expandable bladder in fluid communication with the pump is positioned on the depending side wall, between the top portion and the outwardly flared side wall. When inflated, the expandable bladder seals the cover apparatus to the access opening.

Abstract: A manhole access way security apparatus and method for using the security apparatus are disclosed. The inventive security apparatus includes an insert, at least one locking pin and a locking mechanism each interconnected to allow users to easily and quickly install a security barrier under a manhole, handhole or vault, and thereby prevent authorized access through the manhole, handhole or vault. The inventive apparatus uses an insert that may either sit on the existing manhole frame rim under the manhole cover, or if there is insufficient clearance on the manhole frame rim, brackets may be installed under the manhole frame upon which the insert rests. In either configuration, the insert is secured in place under the manhole cover by one or more locking pins that extend radially through the insert and are then locked to the insert.

Abstract: An adjusting device for installing a manhole ring onto a manhole is provided. The manhole has an annular inner shoulder. The adjusting device comprises a center plate and at least one supporting arm. Each supporting arm has a first end and a second end with the first end of the supporting arm being securable to the center plate. A securement assembly associated with the center plate releasably holds the manhole ring.

Abstract: A vault is contructed for mounting in the ground and formed with at least one wall defining an interior space. At least one cross-connect panel is mounted on the wall in stationery relation thereto. Signal conductors are attached to the panel and extend through the wall. A top cover enables ingress to and digress from the interior space by service personnel.

Abstract: A device for equalizing changes in level between a ground area surface extending over a ground structure and a frame for closure of an installation projecting into a ground structure therebelow, comprises a plate-shaped dragging body connected to the closure frame and projecting horizontally into the ground structure below a carrying layer thereof so as to transfer the change in level to the closure frame, the plate-shaped dragging body being a separate structural element which supports the closure frame on an upper side thereof.

Abstract: An access panel for providing access to cables, services or the like through an opening in a floor having a floor covering, is disclosed. The access panel includes a floor frame (10) located in the opening and a lid (100) supported on the frame (10). The frame (10) has a support flange (26) extending around its periphery which extends between the floor covering and the floor deck. The flange (26) provides a ramped edge tapered substantially uniformly over a distance of between 10 and 20 times the maximum thickness of the flange (26). The outermost part of the flange (26) is typically formed from a flexible polymeric material. A rib (20) extends around an aperture in the frame (10) and the height of the rib (20) is lower than the load bearing surface of the floor. The hinge (24, 120) is generally square and defines a pivot surface which extends parallel to and is spaced inwardly from an inner edge of the frame (10).

Abstract: Two-piece sump cover plate, without water inlet, enables easy installation over the sump container. This two-piece cover plate also enables easy access to the interior of the sump container for servicing of the sump pump, replacement of the sump pump, or other necessary purposes without disassembly of the sump pump discharge conduit. This cover plate has two openings, one accommodates the discharge conduit of the sump pump and the other accommodates the pipe of the battery back up sump pump. The cover plate can have the option Of having only one opening that only accommodates the discharge conduit from the sump pump when battery back up sump pump is not used.

Abstract: An apparatus for adjusting the height and inclination of roadway and greenway appurtenances includes a rigid annular spacer ring sized so as to be mountable onto a manhole, and a manhole riser mountable onto the spacer ring. The riser substantially frusto-conically shaped. A rigid annular base flange may be mounted around a base end of the riser. A plurality of threaded bores are formed in spaced array around the base flange. Rigid elongate threaded members are threadably mountable into the threaded bores so as to be selectively threadably adjustable in the threaded bores and so as to protrude downwardly from the base flange into engagement, beneath the riser, with a top surface of the spacer ring when the riser is mounted on the spacer ring. The threaded members are threadably adjustable in the threaded bores to elevate or to tilt the riser relative to the spacer ring.

Abstract: The present invention provides a manhole cover/frame exchange method capable of minimizing the size of a portion to be mended, of eliminating a pressing step by a roller machine, of eliminating/reducing steps and a required mending time and of suppressing vibrations, noises and the like during the exchanging process. The manhole cover/frame exchange method comprises steps of: cutting a portion of a paved road around the manhole cover/frame spherically; removing the spherically cut portion; filling a self-curing highly fluid non-shrink filler into a spherical hollow space formed by the removing step, and filling a surface layer material over the self-curing highly fluid non-shrink filler. Thus, the pressing step by the roller machine is eliminated by the present invention.

Abstract: A device for covering shafts of manholes in roads, (3) which is slideably guided in a covering ring (2) that is rigidly fixed on the shaft (1) proper, and a retaining ring (4) for receiving the shaft cover positioned in the plane of the road surface (6). Flexible fastening and simple construction is obtained by mounting the retaining ring (4) on the tube (3) so as to be detachable, with a limited degree of movement.

Abstract: A mat is disposed on top of an access cover to compensate for a vertical offset between the top of the cover and the top of the roadway surrounding the cover. Fasteners are inserted through aligned holes in the mat and the cover and anchored in place in such a manner that the heads of the fasteners do not protrude above the top of the cover.

Abstract: A locking lid and method for a valve box. The locking lid has a closure and surrounding external seal, which fit into the valve box opening and close/seal it. The locking mechanism of the locking lid preferably consists of an actuator spindle that extends through the closure, and that is received in an actuator follower positioned therebelow. The actual follower is in pivotal engagement with a plurality of locking pawls, such that turning of the actuator spindle causes movement of the actuator follower and thus pivoting of the locking pawls—moving the locking pawls into a locked or unlocked position relative to a lid seat within the valve box.

Abstract: A cover system in use with a pavement slab, a communicating and downwardly extending manhole tube extending from the slab. The system includes a substantially annular shaped and three dimensional frame, encased within the pavement slab and such that a top edge extending surface of the frame lies substantially flush with a corresponding top edge surface of the slab. The frame further includes an inwardly facing, annular extending and recessed ledge in communication with the manhole tube. A cover is seatingly engaged and supported upon the recessed ledge, such that an upper edge surface of the cover is substantially flush with the top edge extending surface of the frame. A plurality of locking fasteners are arrayed at an angle relative to a perpendicular axis extending through the cover and the frame.

Abstract: A debris-catching system for preventing debris from falling into the pipe opening at the bottom of a manhole catch basin. The debris-catcher comprises two semi-circular halves hinged together such that the two halves may be folded and inserted into a manhole opening. The debris-catcher comprises aligned apertures that allow it to be hooked and lowered into a manhole. The two halves are opened up to form a circular blocker which sets on the manhole bottom flat base. The debris-catcher allows normal effluent flow through the manhole while in place. The debris-catcher floats and will do so during an overflow condition. Further, the debris-catcher will resume its protective function after an overflow condition has subsided.

Abstract: The security manhole insert cover relates to a locking manhole insert to prevent ingress or egress to a manhole from above or below the manhole to prevent access to underground utilities, tunnels and underneath buildings and metropolitan areas to eliminate security intrusions and terrorist attacks by underground access, which would otherwise go undetected if access to the underground utility passages were not secured. The manhole insert cover has a cylindrical locking insert barring access to the engaging and disengaging mechanism required to remove the manhole insert cover and an integrated lower cover to prevent access to the engaging and disengaging mechanism from below, the insert cover adapted to fit within a manhole without required modification of the manhole and without detection of the insert cover having been installed from above ground levels.

Abstract: An attic access apparatus has a housing with a passage open to the attic and a door located in the passage for closing the passage. Insulating material in the passage above the door limits heat loss and air flow through the passage.

Abstract: A corrosion resistant manhole unit having a rotationally molded plastic manifold forming a hollow chamber for providing access to sewer pipes to be connected to the manifold. A manifold inlet connector molded into the manifold for connecting the manifold to an upstream conduit and allowing an inflow of fluid to the hollow chamber. A manifold outlet connector molded into the manifold for connecting the manifold to a downstream conduit so that fluid flows out of the hollow chamber. A manifold riser molded atop the manifold having an open top forming an aperture for accessing the hollow chamber. The manifold riser extending upward from the manifold towards ground level for allowing equipment and personnel to access the hollow chamber through the aperture. A watertight removable riser cap is included for sealing the top of the riser to close and prevent fluid and debris from entering or leaving the manifold.

Abstract: A sealing device that ensures the hermetic securing of the lid (5) in the access mouth (2) in order to prevent any infiltration of fluids from the outside or escape of gases from the interior. The device comprises a frame (1), a lid (5) that rests on said frame (1) with interposition of a sealing joint (6), and a crosspiece (12) in order to facilitate the securing of the lid (5) with the aid of a screw (21). The sealing joint (6) permits complete imperviousness be obtained in the sealing of the device.

Abstract: A manhole/handhole includes a cover and a frame base. A plurality of elastic fixtures are bonded below through holes of the frame base. The through holes are corresponding to fixing holes of the cover so that screw bolts pass through the fixing holes of cover and the through holes of frame base and are locked to the fixtures. The cover is combined with the frame base so as to prevent the cover from jumping. Besides, at least a heightening base is installed between the cover and the frame base. The heightening base is stacked on the frame base so that the manhole/handhole is leveled with road surface for economizing working and time of roadwork.

Abstract: A roof hatch safety railing to help prevent a person from accidentally falling through an open roof hatch while walking on a roof. The safety railing will comprise a top rail sufficiently high to prevent a person from falling over the railing. A mid-rail will also be located so that a person cannot accidentally fall under the top rail. The safety railing will be hingedly attached to the cover of the roof hatch as well as mounted to brackets which have been inserted into the coping of the base of the roof hatch. The safety railing will not interfere with the normal operation of the roof hatch and may be modified to accommodate various types and sizes of roof hatches.