Abstract: Building systems including a frame with a horizontal member from which first and second vertical bars downwardly extend and a panel attached to the frame. The building systems include at least one of an integrated fastener cover that is moveable to a closed position that covers a portion of a fastener, a gusset assembly with a junction cover positioned at a corner junction between two adjacent portions of a panel, and hinge assemblies that reduce the sagging of a panel, such as a door.

Abstract: A tank wall comprises a concrete body, a plurality of reinforcement elements disposed in the concrete body, and a plurality of attachment elements disposed in the concrete body. The concrete body has a top surface, a bottom surface opposite the top surface in a vertical direction, a flat surface extending in the vertical direction between the top surface and the bottom surface, and a tapered surface disposed opposite the flat surface. The flat surface extends perpendicular to the bottom surface and a portion of the tapered surface extends at an acute angle with respect to the bottom surface. The reinforcement elements include a plurality of reinforcement strands and a plurality of monostrand anchors between which the reinforcement strands are attached. The attachment elements include a plurality of U-shaped bars extending through the top surface of the concrete body.

Abstract: A component is a building block having a pair of parallel load-bearing concrete side walls separated by a gap and joined by crossed metal ties which bridge the gap. The outer faces of the side walls can be covered with a decorative finish such as stone. The blocks have an added end wall which enables pillars to be built. The method of casting the blocks utilizes a collapsible metal mold which permits the side walls to be stepped.

Abstract: The prefabricated jail cells to which the connection system of this invention relates comprises a plurality of rectangular structural elements, including rear, side and front walls, each comprising studs and a steel wall plate forming the inside surface of the wall. According to the invention, a structural channel is attached to the back side of the extended end of the wall plate and defines the end of the structural wall element. The connection between two of such structural elements is made with a nut and bolt where the bolt passes through the web of the end-defining channel, through the adjacent wall plate and into and through a connecting component of the wall element to be connected.

Abstract: A modular construction system based on interconnected universal parts including at least one wall having an electrical wiring circuit built-in into the top end of the wall, electrical lateral connection links built-in into the wall, wall-ceiling electrical connection links built-in into the wall, a water pipeline circuit built-in into the wall, and corresponding fixed lateral water connection links; at least one connector to connect adjacent walls; and at least one roof piece made up of at least one inner side containing the electrical wiring network.

Abstract: The present invention provides a viscoelastic wall panel damping device (100) that provides damping against multidirectional reacting dynamic loads that include in-plane shear force resistance and out of plane force resistance. The viscoelastic wall panel damping device (100) of the present invention, including an assembly (100a) having a pair of symmetrically opposing surfaces formed by a pair of damping element planar members (36a, 38b) that sandwiches a rigid planar member (34). The assembly (100a) being overlaid by a pair of face plates (28, 32), a proximal face plate (28) and a distal face plate (32). Aforementioned pair of face plates (28, 32) and the rigid planar member (34) of the assembly (100a) having a plurality of vertically oriented stiffener members (33) comprising of vertically oriented welded strips (33a) of steel disposed with stiffener elements (33b) at spatial intervals along the length of said welded strips of steel (33a).

Abstract: A molding system comprising a decorative portion and a mounting flange for mounting the decorative portion directly to at least one wall stud. The decorative portion comprises a proximal portion, a distal portion, and a decorative front surface. The mounting flange comprises a proximal portion, the proximal portion being coupled to the distal portion of the decorative portion such that the mounting flange extends away from the decorative portion and a distal portion. The mounting flange has a longitudinal axis that is parallel to the longitudinal axis of the at least one wall stud and a thickness from about ¼ inches to about 2 inches. The distal portion of the first mounting flange abuts at least one sheet of drywall. The mounting flange does not substantially overlap the at least one sheet of drywall, and the at least one sheet of drywall does not substantially overlap the mounting flange.

Abstract: A corrugated sheet metal wall sheathing for resisting external excitations such as wind or earthquake of light-framed wall structures. The sheathing has sheet profile proportioned to insure the top flutes deform laterally and yield at the end of the flute before the onset of any failure mode. A transverse slot in included in each top flute and adjacent web of the sheathing and spaced at intervals along the length of the sheathing.

Abstract: An Airloop window wall system for use in modular construction technology. The Airloop window wall system is designed for installation of wall panels from the exterior of a modular unit. Additionally disclosed are horizontal butt joint panels to cover the horizontal butt joints between vertically-adjacent modular units, and Airloop vertical butt joint panels to cover vertical butt joints between horizontally adjacent modular units, while providing a continuous Airloop system for water-tightness performance.

Abstract: An architectural building block including a front terminal wall, a rear terminal wall disposed substantially parallel to the front terminal wall, a pair of side walls adjoining the front terminal wall and the rear terminal wall, a top wall and a bottom wall. The side walls lean toward one another. The pair of side walls converge from the rear terminal wall to the front terminal wall. The bottom wall is disposed substantially parallel to the top wall, wherein each of the top wall and bottom wall adjoins the front terminal wall, the rear terminal wall and the pair of side walls.

Abstract: A semi-interlocking construction block system may include blocks having prism shaped male and female fittings configured for semi-interlocking interaction. When mated the male and female fittings may engage along their respective interfacing upper bases and lower ends of their respective lateral side faces. Gaps may be defined between upper ends of their respective lateral side faces. The fittings may include arcuate edges which may be quarter rounded.

Abstract: A modular frame structure (1) for a wall made of glass or other pane material includes: a lower side or base (2) suitable to receive and lock an edge portion of a pane, an upper side or cross member (4) suitable to receive and lock an edge portion of a pane, one or more posts (6) suitable to receive and lock a portion of a pane, connecting means (8), suitable to guarantee a connection between posts (6) and lower (2) and upper (4) sides, in which: posts (6) comprise a reinforcing bar (9) suitable to confer stiffness to frame structure (1), connecting means (8) comprise a first undercut coupling seat (27) obtained on lower side (2), a second undercut coupling seat (28) obtained on upper side (4), first coupling portion (29) being insertable in first undercut (27), second coupling portion (30) being insertable in second undercut (28).

Abstract: An astragal boot is mounted onto a lower end of an astragal disposed on a free end of a semi-active door in a double-door set disposed over a threshold. The astragal boot includes a platform and a pair of lateral fins spaced from one another and being flexible and projecting downwardly from the platform to seal against the threshold. Primary fins are flexible and project downwardly from the platform a greater distance than the lateral fins and are joined to and extend between the lateral fins. The lateral fins are joined to the primary fins and hold the primary fins into sealing engagement with the threshold to prevent the penetration of water between the astragal boot and the threshold. The lateral fins hold the primary fins against the threshold because the primary fins are thinner thereby minimizing the effort required to close the semi-active door over the threshold.

Abstract: An astragal boot for mounting onto a lower end of an astragal includes a platform, a first and second lateral fin spaced from each other and projecting downwardly from the platform, and an auxiliary fin disposed between the first and second lateral fins. The auxiliary fin defines an auxiliary fin edge extending from the first lateral fin to the second lateral fin for sealing engagement with the threshold. The auxiliary fin includes a hub portion and a first and second leg portion each extending from the hub portion to the first and second lateral fins, respectively. The first leg portion extends along a first direction defining a portion of the auxiliary fin edge along the first direction and the second leg portion extends along a second direction at an obtuse angle relative to the first direction defining another portion of the auxiliary fin edge along the second direction.

Abstract: A highly protective firewall (13) supported between upstanding columns or beams (15). The firewall is made of an inorganic cementitious material which is preferably inorganic phosphate cement. In one form, the firewall comprises a group of vertically stacked panels (14) made of such material, and the panels are in turn formed by a plurality of elongated and vertically stacked hollow members (21) of the same material.

Abstract: A building construction kit comprises a plurality of ground beams (10), for example of concrete, positionable and securable relative to one another to form a rigid foundation frame, a plurality of storey-height external wall panels (30) supportable on and securable to the beams of the foundation frame to form an external building shell and a plurality of floor units (70) which can be supported on and secured to the beams (10) or to the panels (30) to form a floor at, respectively, ground level or an upper level. Each external wall panel (30) comprises a galvanised steel frame (31) with a weatherproof cladding (35), for example of glass-reinforced concrete, at an intended outer side of the panel so that the shell formed by the panels provides a sturdy structure which is weatherproof without the need for a further weather-resistant finish.

Abstract: Trim panels for vinyl double-hung window with raised screen track that provide the traditional look of a wood window. The trim panels are adjacent and abut the raised screen track, thereby eliminating the typical “valley” between the screen track and the trim panels of conventional vinyl windows.

Abstract: A doorframe includes a header having a header jamb and a pair of header casings. The header has first and second ends. The doorframe further includes a pair of legs, each having a leg jamb and a pair of leg casings. Each leg jamb has means for connection with the respective end of the header, at least two recessed hinge placements on a first side of the leg jamb and at least two recessed hinge placements on a second side of the first leg jamb. Each of the recessed hinge placements are suitable for receiving a first side of a hinge. A pair of precut striker plate placements and striker holes are provided on one of the leg jambs for receiving a striker of a door when the doorframe is assembled and a door is attached to the recessed hinge placements on the other leg jamb.

Abstract: Methods and apparatus for assembling muntin bar lattices and spacer frames for use in insulating glass units are disclosed. One method of assembling a muntin bar lattice in accordance with the present invention comprises the steps of providing a muntin bar segment and a keeper dimensioned for piercing a wall of the muntin bar segment. A keeper in accordance with an exemplary embodiment of the present invention comprises an elongate body including a tip portion that is dimensioned for piercing a wall of the muntin bar segment to create an opening therein. A spacer for the separation of panes in an insulating glass unit in accordance with one exemplary embodiment of the present invention may include a tubular member comprising a wall defining a lumen and a mounting flange defining a plurality of mounting holes.

Abstract: An improved molded door having provisions for glass insert comprising at least 50% of said door's exterior surface includes a quadrilateral frame formed of a top rail, a bottom rail, a right stile and a left stile joined together, two sheets of molded door skins, each skin having a large central opening with an inwardly directed flange extending normal to its planer surface and around its respective opening, which flanges interlock when assembled on frame and form secondary frame for receiving a glass insert, means operable to join the skins to the quadrilateral frame, means operable to join the integral flanges of the skins in an interlocked relationship around their respective openings thereby forming an interlocked secondary frame for receiving a glass insert, a secondary left stile located between the joined flanges and the left stile with this stile joined to the skins and a secondary right stile located between the joined flanges and the right stile with this stile joined to said skins whereby the

Abstract: An improved window frame is provided. The window frame utilizes one or more locking panels coupled to the frame body via a living hinge. In accordance with one embodiment of the present invention, the window frame includes a plurality of frame segments extending between respective corners of the window frame. Each of the frame segments defines a cross section comprising a frame body including a locking structure catch formed therein, a frame locking structure arranged to engage the locking structure catch, and a locking panel secured to the frame body via a living hinge. The living hinge is arranged to permit the first locking panel to pivot relative to the frame body between a closed state and an open state. The locking panel is arranged to engage the frame body and define a window securing dimension between the frame body and the locking panel upon pivoting to the closed state.

Abstract: A substrate manufacturing plant comprising a plurality of minimum footprint skinned lines and methods relating to same. Specifically, a plant comprising a plurality of lines each line capable of accomplishing one step of a manufacturing process; the lines arranged in the order of their respective manufacturing steps so as to minimize the time necessary to process a work piece through all the lines; at least one line enclosed in its own environmental enclosure. By utilizing enclosures having the minimum size necessary to enclose and operate a single line or machine and arranging those enclosures in a linear fashion, parts progress linearly through the modules from start to finish without having to pass through a particular module more than once during processing. Because the size required to house a single machine is much smaller than a room designed to house multiple machines and people, control of the environment within the modules is relatively easy and cheap to accomplish.

Abstract: An inspection opening frame includes frame components each of which is provided with a support portion extending along the inner surface of an inspection opening, a front wall holding portion projecting outward from the front surface of the support portion, a rear lid holding portion projecting inward from the rear surface of the support portion, a front lid holding portion projecting inward from the front surface of the support portion and pivotally supported about a hinge, a rear wall holding portion projecting outward from the rear surface of the support portion and pivotally supported about another hinge, and locking portions each having a hook and a projection for disengageably locking the front lid holding portion and the rear wall holding portion in holding positions. The inspection opening frame can be easily mounted at the inspection opening without using a backing or the like.

Abstract: A security closures are adapted to be secured over windows or other openings in a wall of a building. The security closures are fixed to the building in a manner to substantially prevent removal of the closure from the exterior of the building. On the other hand, the security closures provide ways to secure the security closures from the interior of the building while minimizing any obstruction to work being done inside the building.

Abstract: A mull post having an edge surface, a first lateral surface and a second lateral surface with the mull post including a plurality of pocket holes and a plurality of fastener guide passages of sufficient integrity to maintain the axial orientation of a rigid fastener as the fastener is driven at a shallow angle into a frame abutting the mull post to secure the mull post to the frame.

Abstract: A pet door assembly for insertion within a hole formed in a wall having a pair of exterior frames and an inner frame. The exterior frame members mount to opposite sides of the wall and define an opening for allowing passage of a pet. The central inner frame is located between the pair of exterior frames and define an opening generally aligned with the openings in the exterior frames. The inner frame includes mounting structure for mounting centrally a door in the inner frame and over the pet passageway. Appropriate assembly structure secures the exterior frames and the central frame together.

Abstract: A gate girder (5)is provided over the gateway opening of a hangar. To diminish the roof load and working load stressing the gate girder (5), it is supported by at least one girder support (1), which can be combined with a sliding gate plate (1'). On the lower and upper edges of girder support (1), rollers (9, 10) are provided, which are at equal distances from one another. To assure a uniform stress both of the upper support of gate girder (5) and of lower footing (6), in each case pairs of upper rollers (9) are mounted by levers (7) on supports (16), which are guided vertically movable in sliding gate panel (1'). In addition, a freely rotatable roller (15)is mounted on each support (16). A steel cable (18) wound around rollers (15), is placed over each roller (15), which in addition is guided by deflecting rollers (14) mounted freely rotatable on girder support (1), and is fixed with its ends (19) to the girder support (1).

Abstract: This invention relates to both a concrete wall having a series of slanted deflection surfaces to spread the force of impacting vehicles, to buttress against earth forces, and to abate noises and to a method of constructing such a wall. The wall can be economically constructed from precast concrete elements which are adapted to be easily and rapidly stacked and joined in series to save on the cost of labor and materials. The wall is comprised of a series of panels which are stable and self-supporting when placed on a prepared foundation due to the Z-shape of the panels. Stable connection between the panels is provided by cast-in-place concrete, structural support columns. The legs of the Z-shaped panels form a stay-in-place form for the cast-in-place concrete when two Z-shaped panels are placed end to end. The cast-in-place concrete hardens and becomes integral structural support columns for the wall.

Abstract: A hollow cylindrical hunting blind that can be supported on the ground or on a tower is formed of elongate arcuate panels and a domed roof which, in a preferred embodiment, have surface corrugations simulating the bark of a tree. A ladder-stand connected to the tower can be easily disconnected from the tower to serve as a leaning tree stand. Lower windows provide a view of the surroundings from a seated position and smaller peep windows above the lower windows provide a view from a standing position. The lower windows slide to cover the window opening in a closed position and completely uncover the window opening in a fully open position, and can be maintained at selective positions between the fully closed and fully open positions. The domed roof has a rain channel formed therein to capture and direct rain water downwardly and outwardly between the windows. One or more swivel chairs movably mounted in the enclosure are capable of revolving 360.degree.

Abstract: A combination concrete panel wall, concrete window frame, and concrete sash glazing frame. The sill, lintel, and jambs of the window frame are fiber-reinforced concrete extrusions which are cut to length and cemented together. The hardened frame is placed in a concrete panel molding frame to locate and define a window opening. The concrete panel wall grout is then poured and dovetail-type mortise and tenon joints are precast in the exterior faces of the window frame which abut the poured concrete wall panel plastic grout, to permanently mold and interlock the window frame to the panel wall. The sash members are also reinforced concrete extrusions which are cut to length, cemented together, and fitted about a window pane which is located in interior grooves in the sash members and then glazed. An elastoplastic seal interconnects the sash to the window frame to provide a condensation-resistant, water-tight, air-tight, heat and fire-resistant concrete wall closure.

Abstract: An angulated door assembly affording reduced entry and exit time and motion therethrough. Each door is angulated relative to the adjacent walls and/or the conventional path of ingress/egress therethrough. Such an assembly configuration affords increased sealing capacity as well as convenience for the user. The door opens and closes faster by swinging less than a conventional door, which presents itself orthogonally to the path of ingress/egress. By utilizing a pair of angulated doorways, the doors self-seal against each other while providing the advantages of angulated disposition relative to the path of ingress/egress.

Abstract: A glazed panel assembly providing a trim frame preassembled with a pane of glass, or the like, for mounting to wall framing of a wall panel system. Snap-engageable corner trim caps cover corner gussets that interconnect trim frame members. A second trim frame attaches to the opposite side of the wall frame and is substantially identical to the first trim frame with the exception of a glazing channel and pane of glass. The second trim frame may also be pre-assembled. Both trim frames are capable of being attached to the wall framing structural members only at the corner gussets to facilitate quick installation and also permit interchangeability with other panels to change the decor of a wall divider system, including the option of having an open panel pass-through instead of a glazed panel.

Abstract: A laminated wall construction for building exteriors in which a facing outer layer provides the exterior surface and is attached to a corrugated layer such that the corrugations form vertical channels extending along the laminated wall construction. A trough is located at the lower end of the corrugated layer with weep holes formed in the trough whereby moisture which seeps through the facing outer layer flows down the corrugation layer of vertical channels into the trough and out of the weep holes.

Abstract: A compound construction matrix harvests energy incident on all peripheries of a building by providing compound components having anterior and posterior portions with respect to radiation, the anterior portions being generally transparent and the posterior portions being selectively translucent, transparent or opaque, the compound components being arranged in communicating relation to form walls and roofs having multiple internal cavities and passages between cavities which permit light and air to flow freely within the matrix, allowing light incident form any angle to be reflected from cavity sidewalls toward posterior portions to form overlapping incidence on translucent conversion surfaces and to pass through tinted conversion means for direct gain, and allowing air in each cavity to expand freely in any direction from sunlit to shaded portions and through apertures toward shaded portions of adjacent cavities, to thereby form a dynamic airstream passing over translucent conversion surfaces and non-transpare

Abstract: An arrangement for mounting in an opening of a building frame a window unit having at least one panel mounted in a rectangular framework formed by a pair of left and right longitudinal frames, and an upper transverse frame and a lower transverse frame means which are connected, respectively, to the longitudinal frames at upper and lower positions includes upper connecting metal fixtures fixedly secured to the upper part of said opening of the building frame, and lower connecting metal fixtures fixedly secured to the lower part of the opening of the building frame, the indoor side of the upper transverse frame of said window unit being connected to said upper connecting metal fixtures, and the indoor side of the lower transverse frame means of said window unit being connected to said lower connecting metal fixtures, so that a window unit can be mounted rigidly onto a building frame by a simple operation in such a manner as to prevent deformation or bending of a lower window frame and a transom towards the indo

Abstract: Improved frame assembly for doors, windows and the like is provided. The assembly includes a frame defining an opening for receiving and retaining a central panel. The frame is formed from two joined skins which may be molded in the same mold and which are provided with inwardly extending flanges having notched areas on opposite sides of the flanges such that the skins can be joined together to form a lap joint on the exterior edge and to seal a central panel in the opening. Foamable insulating material is provided as a core between the two skins with a separate sealant material provided to seal the central panel. Passage means are provided for introducing the sealant material and the insulating material.

Abstract: A "dry" two sided vertical structural butt glaze system for window structures wherein a modular frame assembly is fabricated and glazed off-site. The assembly is installed in the window structure from the building interior and is provided with gasket strips which seal the exterior butt joint between adjacent panels of the frame assemblies. Exterior scaffolding and caulking operations are eliminated.

Abstract: A building wall construction installed on a building comprises a plurality of successive window units and at least one corner window unit disposed between two adjacent ones of the window units and having a preformed corner angle identical to that of a corner of the building where the corner window unit is positioned. The corner window unit is joined to the adjacent window units by attachment projections positionally adjustably fitted in recesses, respectively. The corner window unit may be of a salient or re-entrant corner angle.

Abstract: Disclosed is a fire protection dividing wall for installation between construction parts of a building. The wall is assembled of a supporting frame carrying fire protection glass panes. The frame is assembled of a steel core which includes upright struts and horizontal tie bars which carry the glass panes. The frame core is preferably made of steel tubes of rectangular cross section. The struts are provided with opposite projections which are inserted into the ends of the tie bar sections. The opposite outer sides of the frame cores are covered with covering rails of hard wood, which has approximately the same fire-resistant time factor as the glass panes. The gaps between the covering rails and the glass panes are sealed by a fire-resistant sealing mass.

Abstract: A wall panel for a building may be formed by twin sheet vacuum form molding an entire end panel which may then be cut to form an access opening which may be closed with the removed portion forming the door with the cut panel reassembled to form the building wall and door frame. A novel closure and lock secures the door.

Abstract: A composite structure window belt has a roll of the lined reinforced plastic window frames set between honeycomb core and covered top and bottom with a reinforced plastic cover. The window frames have built-in reinforcements to accept fasteners for securing windows within the diamond-shaped openings.

Abstract: The system is for covering an existing building to finish particularly the exterior face of the building. Pre-fabricated panels with windows previously installed are secured within an existing window opening with the primary attachment for each panel being only at the window opening. Each panel comprises interconnected studs and bridging forming a frame having supported therein fiberglass insulation. Adjacent panels are sealed therebetween by a caulking bead. The panel is supported from the existing window opening by bracing at the top and sides.

Abstract: The specification discloses a prefabricated partition arrangement for fitting rooms and the like, comprising a pair of parallel, laterally spaced side panels having rearward edges thereof fastened to an interior wall of a building by a first pair of channels. A front panel with a door therein extends between the forward edges of the side panels and is connected therewith by a second pair of channels, thereby forming a sturdy, postless partition assembly.

Abstract: An improved method of wall construction, and an improved wall construction are provided by the invention. The individual components of the wall are first set in place and then encased in concrete to form a load bearing wall. Multiple channel track units are positioned at the upper and lower edges of the wall, extending therebetween is a plurality of non-load bearing uprights. Attached to the uprights are the various wall components such as doorframes, insulation windowframes, wiring and piping conduits. Forms are then set into place and the concrete is poured, upon hardening of the concrete the load bearing wall is complete, thereby eliminating customary furring strips, inside insulation, sheetrock, and external siding, plastering, stucco, etc.

Abstract: A series of preformed panels are joined together at mating elongated male and female joint portions. The joint portions are secured together by a series of discrete spaced apart flexible tension members looped about portions of each panel.

Abstract: A two story building consistng of three elongated box-shaped prefabricated sections wherein there are two sections connected together side by side on the ground floor and a further section is stacked on one of the ground floor sections to comprise the second floor. Each section includes a framework of metal beams and the walls of the section are defined at least in part by the metal beams of the framework. The walls may include openings for doors, windows and interior passageways. Each wall is composed of cast concrete and has embedded therein a plurality of stiffening bars. The stiffening bars are inclined to both the horizontal and vertical and have bent-over ends which are disposed at corners of the walls without touching the proximate metal framework. The stiffening bars also have portions near each corner of an opening and, between openings and vertical framework components, the stiffening bars cross each other to produce a truss-like structure embedded in the concrete of the walls.

Abstract: Disclosed is a narrow frame wall structure having panel gripping mullions formed of extruded metal. Typical vertical mullions comprise a mullion proper with a glazing pocket on one side and one half of a glazing pocket on the other side, a mullion stop attached to the mullion proper after installation of a panel, and a mullion filler snap-locked to the mullion proper and the mullion stop to provide the remaining half of the second glazing pocket, thereby providing easy glazing and adequate glass bite notwithstanding the narrowness of the mullion. Joints between vertical and horizontal mullions are formed with joint pins positioned internally of the horizontal mullions on internal splines, and abutting, passing into or through, the vertical mullion, with predrilled screw holes in the pin so located that a screw hole is positioned a predetermined distance from the side of the vertical mullion in every standard location of the pin.

Abstract: A structure of lightweight plastic material has a plurality of doors. Each of the doors is selectively openable, closable and lockable. A plurality of movably mounted partitions are provided in the structure for dividing the structure into a plurality of compartments. The structure is affixed to a supporting surface. A plurality of rails are provided in the structure in spaced parallel relation on the floor of the structure. Each of the rails is movably mounted at one end, so that it is selectively adjustable in inclination with the floor. Each of the rails accommodates a bike.

Abstract: A door or window frame is provided at a pair of opposite locations with tilting means mounting the frame in a wall opening for pivotal movement about an axis perpendicular to these sides of the frame. The frame is also equipped with fixing means which may be extended to engage the structure once the frame is in place. Where necessary, holding devices which are engaged upon pivotal movement of the frame are provided upon the frame and the structure along sides other than those carrying the tilting means, all of the several means and devices being locked once the frame is properly positioned by locking nuts or the like.