Abstract: A joist tie may be designed to increase the strength of the joist tie and reduce the thickness of the joist tie, in order to provide the desired strength and the ability to make connections that operatively couple structural decking, the joist tie, and joists together using a single connector in one or more locations. The joist tie may be strengthened through the use of one or more ribs and/or one or more flanges. The one or more ribs may be formed to fit within one or more cavities within adjacent joists located in series. As such, the shape of the joist tie may be dimensioned in order to allow the joist tie to be placed on a first joist and a second joist without having to be attached until after assembly of the structural decking on top of the joist tie and joists.

Abstract: A construction module for a structure, comprising: a formwork member that includes a base, a pair of parallel side walls that extend upwardly from the base, and a pair of parallel end walls. The base, the side walls and the end walls define a cavity for reinforcement and concrete. A reinforcement member includes an upper portion and a lower portion. When the reinforcement member is located in the cavity and concrete fills the cavity, the lower portion of the reinforcement member and the concrete define an elongate beam.

Abstract: Configurations of tools, e.g., as used in the tool strings of electrical submersible pump systems, that prevent the separation of the tool string into two disconnected units upon breaking of a tool within the tool string. In an example configuration, such a non-parting tool includes a head and base connected to each other via a housing and a shaft extending through the tool, as well as mechanical stops affixed to the shaft that limit, upon breaking of the housing, the relative motion between the head and base.

Abstract: A construction module for a structure, comprising: a formwork member that includes a base, a pair of parallel side walls that extend upwardly from the base, and a pair of parallel end walls. The base, the side walls and the end walls define a cavity for reinforcement and concrete. A reinforcement member includes an upper portion and a lower portion. When the reinforcement member is located in the cavity and concrete fills the cavity, the lower portion of the reinforcement member and the concrete define an elongate beam.

Abstract: Disclosed is a container module for construction having a fireproof floor slab. The container module for construction having a fireproof floor slab may include: two lower side rails that constitute lower long sides among lower sides of the container module for construction; two lower end rails that constitute lower short sides among the lower sides; four lower corner castings respectively arranged at corners between the lower sides; supporting units respectively provided to be inwardly protruded from inner surfaces of the two lower side rails; and a slab part of which both ends are supported by supporting surfaces of the supporting units respectively provided at the two lower side rails.

Abstract: A concrete insert for metal deck formed concrete includes an elongate, generally planar body having opposite upper and lower faces, and opposite first and second longitudinal ends. A rod opening is located between the first and second longitudinal ends and extends through the upper and lower faces of the elongate, generally planar body. A female screw thread extends at least partially about a perimeter of the rod opening and protrudes at least one of above the upper face and below the lower face. The female screw thread is configured to threadably mate with a male thread of a threaded rod.

Abstract: Metal panel standing seam roof recovers installed over existing metal panel standing seam roof. The metal panel standing seam roof recover system comprises a plurality of recover panel clips mounted to the existing roof and a recover attached to the recover panel clips. The recover panel clips are arranged in linear arrays running along the pitch of the existing roof. The recover panel clips are mounted to the cover panels by a clip fastener extending through a cover sidelap or through a shoulder adjacent a cover sidelap formed in the standing seam metal panels of the existing roof. The recover comprises a plurality of elongated metal recover panels having upstanding sides defining lateral edges with a trough therebetween. The recover panels are interconnected along adjacent lateral edges by sidelaps formed on the recover panel clips.

Abstract: The subject invention provides for metal panel roof recover systems which are installed over an existing roof. The existing roof has a support frame which includes an array of spaced purlins running horizontally through the roof and a plurality of interconnected metal panels that are mounted vertically across the array of purlins. The roof recover system comprises individual panel clips, elongated panel clips, and a metal cover. The individual clips are arranged in linear arrays running vertically across the purlins and are mounted to the purlins through the panels of the existing roof. The elongated continuous panel clips extend vertically across and are mounted to adjacent purlins through the panels of the existing roof. The metal cover is attached to the clips and comprises a plurality of metal panels interconnected by vertical standing seams formed on the clips.

Abstract: A deck system includes plural deck units fastened together and carried directly by the framing system of a building directly or indirectly by frame elements that are themselves carried by the framing system. To relieve lateral forces on the deck system that exceed a pre-engineered level, these frame elements include a slidable support and slidable brackets both with slotted holes that permit controlled and limited movement of the deck system in two mutually orthogonal directions with respect to the framing system of the building. In addition, the individual deck units may move horizontally with respect to the each other and the framing system. Each decking unit may be connected to an adjacent decking unit using a slotted hole formed in one of its two side laps.

Abstract: A fire retardant cover is disclosed herein for covering a ceiling-side recess of a fluted roof deck and for providing a flat surface for installation of a head-of-wall track (associated with a steel stud wall assembly). The fluted roof deck has an undulating bottom surface that defines a plurality lengthwise recesses corresponding to a plurality of ceiling-side flutes of the fluted roof deck. The fire retardant cover is substantially flat and configured to sealingly cover at least one of the plurality of lengthwise recesses. The fire retardant cover comprises a piece of sheet metal bent to define first and second upwardly extending protrusions. The protrusions are spaced apart from each other by a substantially flat web section and have laterally facing outer top surfaces matched to sealingly contact lengthwise bottom surfaces of one of the plurality of recesses of the fluted roof deck when the fire retardant cover is installed.

Abstract: A support assembly for supporting a retrofit roof to be installed above an existing roof made of preformed panels. Elongated support assembly members are positioned along the roof line to provide additional points of attachment for the new roof, while at the same time forming a substantially even plane for new roof panels. Some of the support members fit in the channels between the ridges of the preformed panels, which can be R-panels or standing seam panels. Transverse top members secure the channel-mounted members in place, while strapping members positioned atop the top members form additional lateral support for the new roof. A plurality of bracket support assemblies is secured between the top members to the roofing panels to elevate the new roof support. The bracket support assemblies are formed of two engageable parts to increase resistance to wind forces.

Abstract: A support assembly for supporting a retrofit roof to be installed above an existing roof made of preformed panels. Elongated support assembly members are positioned along the roof line to provide additional points of attachment for the new roof, while at the same time forming a substantially even plane for new rood panels. Some of the support members fit in the channels between the ridges of the preformed panels, which can be R-panels or standing seam panels. Transverse top members secure the channel-mounted members in place, while strapping members positioned atop the top members form additional lateral support for the new roof.

Abstract: A building form that uses two building panels made of a rigid board and rigid insulation are supported by light gauge framing members and integrating two adjacent building panel molds forming a ribbed chamber into which concrete can be poured. The building panels when jointed together form a depression within the mold panel for a concrete rib when concrete is poured over the building panels. In addition, each of the building panels when separated by another fire resistant board thereby forming a space between the panel molds forming a wider forming mold which becomes an integral part of the building panel. The separated building panels also allow for mechanical means to be distributed. Additional forming means can be added for a wider and deeper forming structure. Several different transverse support beams can be used to increase the panel mold structural strength.

Abstract: A method of constructing a wall of a building by casting in which formwork is erected and concrete is allowed to exude through perforations in the formwork, embedding the formwork in concrete and obscuring it from view. A panel for carrying out the method, a thin-walled sheet with multiple perforations for the escape of the concrete during casting, has brackets or clips to fasten it to the adjacent formwork creating a casting space between the panel and the supporting formwork. Floating the expressed concrete produces a smooth finish.

Abstract: A flooring of pre-stressed deck construction having an elongate decking extending along the flooring is provided. The decking has an upwardly facing asymmetrically profiled channel formation whereby the neutral axis is above a central horizontal plane. A tension rod extends between stressing brackets secured to each end of the decking and is located below the neutral axis of the decking along the length of the decking. Each stressing bracket is secured to upwardly extending sidewalls of the channel above the tension rod. The decking is attached to the girder framework of a building.

Abstract: Composite structural system for floors or roofs comprising steel beams and reinforced concrete slab or shear walls comprising steel columns and reinforced concrete diaphragms. In both cases a steel plate with holes crossed with rebars is welded to the steel beam or to the steel column which performs the integral combination of the concrete, the structural element and the rebars.

Abstract: A stress-optimized structural support which may be utilized as a beam or assembled with similar supports to form a building floor or roof panel or a bridge deck utilizes an open core element, made preferably of suitably treated fluted paper, upper and lower thin skin sheets, preferably steel skins, and a layer of concrete poured over the top skin. Modules comprising the hollow core element and the upper and lower skin sheets are fabricated to lengths required for building floor, roof or bridge spans and, when joined by welding or otherwise joining the upper and lower skin sheets of adjacent elements along their full lengths, provide a floor or roof deck structure of a large span with horizontal stresses distributed omnidirectionally. A post-stressing tensile system redistributes and reduces the load on the roof deck by about one-half.

Abstract: In one implementation of the present invention, corrugated metal deck panels are attached to concrete structural beams to form a precast panel.

Abstract: A modular center plate for a cover that bridges the expansion gap and is supported by frame members of an expansion joint cover is made up of a plurality of formed members, each formed member being rectangular in plan and of uniform cross-section along an axis and having side edges parallel to the axis. The formed members are arranged with their side edges adjacent each other and with their ends overlying the support surfaces of the frame members of the expansion joint cover. End frame members are attached to the end edges of the formed members.

Abstract: The present invention concerns a framing system for a composite concrete floor, the framing system comprising horizontally extending primary framing members supporting secondary framing members across the primary framing members. Each of the secondary framing members has two opposite ends provided with a shear shoe fixed to the primary framing members by means of a structural joint sufficient to provide a shear connection between the concrete floor and the primary framing members. Thanks to these shear shoes, the framing system of the invention has an increased resistance to horizontal shear forces as compared to prior art concrete floor systems.

Abstract: A composite construction panel having a thin panel of concrete material and a reinforcing grid of sheet metal studs with embedment portions which are actually embedded into the concrete panel, each of the studs having a web, main web openings through the web, a right angular flange formed on a free edge of the web, an embedment angled flange portion formed along the opposite edge of the web, an edge strip formed on the angled flange at an angle thereto; and, spaced apart angled flange openings formed in the angled flange for flow of concrete therethrough. An alternate form of stud has a triangular tube structure along one edge of the web. Another form of stud has a discontinuous webs defining spaces between them. In one embodiment two concrete panels may be secured to the studs in spaced relation to create a hollow structure.

Abstract: An improved structural reinforcement bar for use in poured concrete construction has an anchorage plate fixed to a rebar body through friction welding. The friction welded rebar body and anchorage plate result in a structural reinforcement bar with improved axially oriented tensile load transfer capabilities having minimal space requirements.

Abstract: A section fixable in a mounted position to an anchoring base by means of fastening screws has at least one fastening segment extending in the mounted position substantially parallel to the anchoring base. The fastening segment is, for example, a fastening flange, which is provided with at least one screw hole for receiving a fastening screw provided with a slot or cross slot as the surface engaged by a screwdriver. A safety (or securing) tab protrudes from the fastening segment at least within the area of the screw hole. When the section is in its mounted position and after the fastening screw has been driven in, the safety tab can be deformed by bending or folding it into its safety or securing position. In this position, the tab grips over the edge of the screw head of the fastening screw and leaves free the surface engaged by the screwdriver. In an alternative embodiment of the section, a spring-elastic safety arrest is used instead of a bendable safety tab.

Abstract: A section fixable in a mounted position to an anchoring base by means of fastening screws has at least one fastening segment extending in the mounted position substantially parallel to the anchoring base. The fastening segment is, for example, a fastening flange, which is provided with at least one screw hole for receiving a fastening screw provided with a slot or cross slot as the surface engaged by a screwdriver. A safety (or securing) tab protrudes from the fastening segment at least within the area of the screw hole. When the section is in its mounted position and after the fastening screw has been driven in, the safety tab can be deformed by bending or folding it into its safety or securing position. In this position, the tab grips over the edge of the screw head of the fastening screw and leaves free the surface engaged by the screwdriver. In an alternative embodiment of the section, a spring-elastic safety arrest is used instead of a bendable safety tab.

Abstract: A roof system for sloped metal roofs utilizing plywood decking, corrugated metal panels and one or more spacers disposed between the decking and metal panels for holding the metal panels vertically above the decking. The spacers have a planar top section, a planar bottom section and a center section to hold the top and bottom sections in spaced apart relation. The spacers also have one or more openings to form an airflow cavity between the decking and metal panels to permit the circulation of air therein. In the preferred embodiment, a thermal barrier layer is disposed between the spacers and the decking and the airflow cavity connects to a ridge vent located at the ridge of the roof and an eave vent at the eave of the roof. The roof system allows ambient air to be drawn into the eave vent to circulate through the airflow cavity and out the ridge vent in order to prevent thermal flexing of the metal roof and the build-up of moisture between the metal panels and decking.

Abstract: A ribbed metal plate for a composite slab that includes a substantially planar plate having an upper surface and a lower surface and a plurality of laterally-spaced, longitudinally-extending ribs that have a keystone profile and wherein the sidewalls are angled toward each other. Ends of the ribs are integrally formed. The rib plate is secured to bearing walls in a structure and concrete is poured on the ribs to form a composite deck. The ends of the ribs extend in the lateral direction to form a composite structure retarding movement of cured concrete in a longitudinal direction. The ribbed plate can also be used in composite beams.

Abstract: A method of constructing a suspended floor is described in which a plurality of beam-forming formwork assemblies are located in substantially parallel alignment, the beam-forming formwork assemblies are supported in support assemblies on a support base in stable equilibrium, a plurality of floor-forming formwork assemblies are located between the beam-forming formwork assemblies for support thereon, concrete is poured in said formwork assemblies, the concrete is allowed to set, and the formwork assemblies are removed from the set concrete for re-use.

Abstract: A deck panel for reinforced concrete slabs is disclosed. The deck panel is formed by integrating a plurality of deck girders with a deck plate into a single structure. In each of the deck girders, a single lattice member is welded to upper and lower steel bars. The lattice member has a zigzag configuration with both a plurality of holding rib parts and a plurality of horizontal foot parts. The lattice member is positioned relative to the upper and lower steel bars in a way such that the holding rib parts, individually having a foot part, are alternately positioned on opposite sides of the upper and lower steel bars. A vertical fixing steel bar is welded to each end of the deck girder with both the top end of the fixing steel bar being welded to the upper steel bar and the middle portion of the fixing steel bar being welded to the lower steel bar.

Abstract: A concrete floor system includes the use of sheet metal pan or decking and sheet metal z-shaped closures sitting upon low profile open web steel joist providing a non-structural or structural concrete brake above the walls forming vibration damping and sound & fire barriers. The z-shaped closures have apertures formed through them which correspond to the end profiles of the joist shoes of the joists, and are fitted onto the joists before or after the joists are in place. The need for sound and vibration damping rock wool, foams and other similar material below the floor and between walls is eliminated.

Abstract: The invention relates to a ribbed plate for a composite slab, the profile of which consists of protruding ribs formed in an essentially planar plate, the upper flanges of the ribs being surface profiled in order to achieve better adhesion between the ribbed plate and the concrete of the composite slab. According to the invention, the surface profiling of the upper flange of each rib consists of spaced apart corrugations extending essentially across the upper flange. Additionally, in the junction of the web between the sides of the rib and the upper flange there is formed a protruding longitudinal corrugation extending at least partly along a length of the rib.

Abstract: A welding stud designed to have reduced weight without loss of strength by having a stepped diameter, cylindrical form shank with a relatively thin head. The head is centrally depressed and the shank is of a first relatively large diameter closely adjacent the head and is extruded to a smaller diameter from there to the end opposite the head. The weight is additionally reduced by providing the head with a central depression which extends into the head from the axial outer end. The method of forming the stud starts with a workpiece of a diameter larger than the final desired stud diameter and cold heading the workpiece to form the stud head. Thereafter, the shank of the workpiece from a point spaced from the head to the free end of the shank is extruded through a circular die to reduce its diameter to the desired final diameter throughout the majority of its length.

Abstract: The present invention pertains to a long-span decking panel. The long-span decking panel is used, for instance, to span the space between girders to create a roof or a composite floor. The panel has a flange member having a first edge and a second edge. The edges are at least 11 inches apart. The flange member defines an essentially flat unbroken soffit except for a series of stiffening ribs running transverse to the edges. The stiffening ribs provide sufficient rigidity to the flange member to prevent it from buckling along its length. The long-span decking panel also has a first web member which is integrally jointed and extending obliquely form the first edge. There is also a second web member integrally joined and extending obliquely from the second edge. The web members can be of any desirable length depending on the decking situation.

Abstract: A bracket for use in the after market of metal clad buildings to facilitate attachment of new roof or wall panels of any desired profile, directly over existing ribbed or fluted panels of various configurations. Commonly known in the trades as a sub purlin or sub girt. Generally a one piece Z shaped metal bracket with opposed top and bottom flanges in a parallel plane. The bottom flange and adjacent lower portion of the web contain a series of notches that allow the bracket to nest onto and over existing ribbed roof or wall panels. The top flange is automatically in position, lying flat and continuous, to receive and attach the new panels thereto. The solid portion of lower flange is preferred to be positioned directly above the underlying substructural support system members of the existing building to assure a structurally sound attachment of bracket to the building.

Abstract: A method for the fabrication of a composite structure made from a profile plate and concrete. The relatively lightweight steel profile plate is placed at the building site. At the building site the concrete is sprayed on the surface of the profile plate to form the composite structure. The profile plate can be sprayed with concrete, layer by layer, with each layer being allowed to at least partially set between sprayings. Thus, the inherent load-bearing capacity of the structure increases as the layers are applied and the weight of the structure increases.

Abstract: A reinforced concrete floor structure having reinforced concrete beams and girders supporting a metal subfloor and a monolithic concrete layer. The metal subfloor comprises alternating first and second flooring units wherein the first flooring units span across a plurality of the beams and thereby enhance the load carrying capacity of the floor structure. In one embodiment, the first flooring units comprise cellular flooring units that provide for the distribution of wiring throughout the floor structure. In alternative embodiments, the first and second flooring units each comprise cellular flooring units or each comprise non-cellular flooring units. The metal subfloor presents openings in the region of the beams and girders so that the monolithic concrete may comprise the concrete of the beams and girders and the layer of concrete covering the metal subfloor.

Abstract: A floor system for residential and light commercial construction utilizing the composite action of a thin concrete slab and cold formed steel sections. A comparatively high load capacity is achieved with minimum floor thickness for short and medium spans. The composite action is achieved by a bond bar affixed to a cold formed section and embedded in the slab. A shear transfer device is attached to the bond bar and the cold formed steel section. The system may be used in buildings framed with masonry or concrete bearing walls, structural steel beams and girders, and precast, or cast in place, concrete beams and girders.

Abstract: The present invention is a long-span decking panel. The decking panel is comprised of a first panel section having a first open channel. Extending from a first edge of the first open channel is a first side flange. Similarly, extending from a second edge of the first open channel is a second side flange. The first panel section has a first end for bearing against a first support surface and a second end for bearing against a second support surface. The support surfaces can be provided by structural I-beams or steel trusses, for example. The first panel section has a first length. The decking panel also comprises a second panel section having a second open channel. Extending from a first edge of the second open channel is a first side flange. Extending from the second edge of the second open channel is a second side flange.

Abstract: A modular building formed from non-combustible materials which includes a support frame. The frame includes subflooring with a connected concrete pan which allows the concrete floor to be directly into the frame. The building also includes roof edge supports for connecting beams which allow two or more buildings to be joined to form a single complex.

Abstract: This invention relates to the provision of mechanical anchorage in composite steel and concrete structural members such as slabs and beams, and more particularly to anchors adaptable as end anchors, to decking panels fitted with end anchors, and to composite structural members incorporating concrete slabs on such decking panels. According to a first aspect, the invention provides an anchor for composite steel and concrete structural members including an element of substantially rigid sheet material defining a base portion and at least two flange portions upstanding from the base portion, which element is a length to fit across a pan of a ribbed metal sheet with the flange portion extending across said pan, and means on or co-operable with the base portion engageable with complementary holes in the metal sheet so to extend through said holes, said means being adapted for holding the element in the metal sheet.

Abstract: A building structure comprises two parallel plates (2, 3) attached to means (4) therebetween forming channels (5, 6). Some of these channels are filled with concrete so that concrete ribs (10, 11) are formed, which preferably are provided with reinforcement (12). This building structure will in many cases be provided with a cover (9) of concrete. In order to form a connection between the cover and the concrete ribs (10, 11), holes (13) are made in one of the plates (3) in order for a monolithic connection to be formed between the ribs and the concrete. A shear force reinforcement (15) may be placed into the ribs (10) though the holes (13). The plates (2, 3) with the channel forming means (4) constitute a prefabricated element (1) which is brought to the building site without holes (13) in said one plate.

Abstract: A composite structure comprising a plurality of support members (11) arranged to form a decking member within a slab (15) said support members (11) comprising a pair of flange members (13, 14) joined by connecting a connecting web member (12), at least one flange member (11) having a lip portion.A support member (11) comprising a pair of flange members (13, 14) joined by a connecting web member (12), at least one flange member having a lip portion, said lip portion comprising a ridge member and depending stepped portion.

Abstract: This invention relates to the construction of a composite beam structure in a composite steel deck floor system. A T-shaped beam is welded through the valleys of the steel deck onto the top flange of the supporting beam. After concrete pouring, the T-beam is buried within the concrete slab to act as the shear transferring device to achieve the composite beam action. The T-beam also serves to strengthen the supporting beam in resisting the load during the concreting operation and to facilitate the placement of the concrete shrinkage control wire mesh.

Abstract: A composite metal/concrete floor system and method of installation. The system includes a novel decking profile; snap-in cover plates to provide longitudinal cells for three services; a lateral trench with sheet metal rails and bottom plates; and cooperating preset inserts. The deck and cover plate may be used as distribution cells suspended between the bar joists of a formed deck.

Abstract: A construction of girder and joist supports for framed concrete slabs wherein continuous metal decking and standard joists are used and wherein rigid connections are established between the concrete and the girders by means of shear connectors which are embedded in the concrete and connected to extensions fixed to the tops of the girders.

Abstract: A deck structure is disclosed in which overlapping and interlocking corrugated members, each formed from a single sheet of metal, are covered with a layer of concrete. Each corrugated member has at least one longitudinally extending valley along one side and a substantially flat flange provided on an opposite side. The flange may include spaced-apart longitudinally extending shallow depressions spaced at a distance and configured to receive and interlock with an adjacent member. When the decking is used as a deck form, the end portions of the sheet members may be partially or completely closed. Perforations which may be provided in flange portions of the members, allow water and other liquids to drain through deck form and to be caught in a vented valley portions of an adjacent member.

Abstract: Cellular steel flooring is provided which includes corrugated steel decking and separately applied cover plates which establish a lengthwise cell in cooperation with a valley and the two connecting sloping sidewalls. The resulting cellular steel decking permits distribution of electrical wiring or ventilation air throughout a building without requiring perforations or penetrations of the crest surfaces or sloping sidewall surfaces of the decking. The resulting wet strength of the cellular steel decking remains undiminished. The exposed corrugated undersurface of the corrugated steel decking provides an improved adhesion surface for subsequently applied fireproofing materials. Special cover plates for noncellular troughs are provided along the locus of transverse electrical trench structures to facilitate the mounting of the electrical trench and to permit strengthening concrete to be applied beneath the electrical trench.

Abstract: A construction of girder and joist supports for framed concrete slabs wherein continuous metal decking and standard joists are used and wherein rigid connections are established between the concrete and the girders by means of shear connectors which are embedded in the concrete and connected to extensions fixed to the tops of the girders.

Abstract: A scale assembly includes a plurality of force measuring transducers which are connected with an improved platform. The platform has an upper portion which withstands compressive stresses and a lower portion which withstands tensile stresses during the weighing of a load. The upper portion of the platform includes a body of concrete having a corrugated lower major side and a flat upper major side which receives a load to be weighed. The lower portion of the platform includes a metal structure having a plurality of elongated ribs which are disposed in abutting engagement with the corrugated lower major side of the body of concrete. The ribs are connected with a bottom plate which cooperates with the ribs to form elongated cavities. At least a major portion of each of the cavities is disposed within the spatial envelope of the body of concrete to minimize the mass of the concrete.

Abstract: A sheet metal structural shape for use as a stud or mullion in wall construction or a purlin or sub-purlin in deck construction which is symmetrical about a vertical bisecting plane having a central vertical web, two diagonal legs projecting downwardly from one end of the web forming an included angle of about 30.degree. to about 90.degree., each of the diagonal legs having a leg projecting downwardly at its extremity in a plane substantially parallel to the web, each of the parallel legs having flanges extending outwardly at their extremity, a closure side extending between the extremities of the flanges enclosing the area formed by the diagonal sides, parallel sides and closure side, and a stiffening member at the other end of the web. A wall structure utilizing a spaced series of the metal structural shapes with a wall material attached to the flanges of adjacent structural shapes.

Abstract: A poured concrete deck structure which extends to the external building line or to a designated line of an internal opening of a building has a form deck which is supported by metal structural girders, including edge girders which are spaced from the building line or designated line, and an edge construction which retains the concrete according the building specifications. The edge construction is improved by terminating the form deck at the edge girders, providing a plurality of spaced support means secured to the top of the edge girders and extending towards the building line or designated line and providing a plurality of adjacent pans for retaining the poured concrete. The pans are supported by at least two supports, and are in communication with an edge girder. The pans may be secured to the edge girder, to the support means, or to both, after proper alignment with the building line or designated line.