Abstract: A door frame made of synthetic material having an elongated, horizontally-oriented head and an elongated, horizontally-oriented sill, spaced apart from the head portion. The head and sill are preferably single, continuous members. The door frame also has at least two spaced apart, vertically-oriented jambs, each connected at one end to the head and at an opposite end to the sill. The jambs have a cavity disposed vertically therethrough. A rigid supporting member is then provided within selected jamb cavities. The rigid supporting members are preferably made of metal, such as aluminum, aluminum alloys and ferrous and non-ferrous materials. The jambs may further have more than one cavity disposed vertically therethrough, so that more than one supporting member is provided in a jamb.

Abstract: A closure assembly is provided assembled from framing sections being fiberglass pultrusions having thin walls, sufficiently thin so as to require reinforcing of the pultrusion proximate the ends and at predetermined positions to allow for (i)joining adjacent pultrusions together and (ii) assembling hardware to the pultrusion, (iii) mounting the pultrusions when assembled in an opening.

Abstract: A commercial refrigerated display case includes mullions for slideably receiving removable ballast drawers from the sides of the mullions for quickly and easily servicing fluorescent ballasts.

Abstract: A security reinforcement device for a doorjamb with a striker plate on an inner face of the doorjamb comprising an elongated flat reinforcing bar having a recessed area on one side edge thereof. A facility is for mounting the elongated flat reinforcing bar onto a rear surface of the doorjamb, with the recessed area located at a forward bent portion of the striker plate, so as to prevent a break-in of a door caused by a sudden force applied to the door by an intruder.

Abstract: An improved door jamb and brickmold assembly has a rectangular wooden jamb and a unitary co-extruded thermoplastic member mounted to said jamb and defining both the door stop and the brickmold of the assembly. In one embodiment, an elongated securing tab projects from the brickmold and is positioned to overly the exterior surface of a building in which the assembly is mounted for securing the brickmold to the building.

Abstract: A metallic frame and, more particularly, a stainless steel door frame has a bent sheet metal frame element encompassing an inner space and the element has backbends which extend perpendicularly inward from the back ends of faces of the element. At least one slidably insertable sleeve is disposed inside the element and has flanges which are spot welded to the back ends. The sleeves serve as carriers for various door hardware such as hinge reinforcement and strike plates, clips having bendable tabs, and anchors.

Abstract: A door frame and a method for constructing a door frame assembly for use in prefabricated housing. The door frame assembly has a header frame and two side frames fixedly attached and constructed out of metal. The door frame assembly is slidable into position in a prefabricated housing unit. The individual frame members are preferably manufactured from galvanized steel.

Abstract: A plastic door frame structure and a method of mounting the same after a threshold is installed in a door hole including fixing a packing rail on a wall of the door hole, fitting an outer rail on the packing rail and adjusting the horizontal or vertical position of the outer rail, arranging a link rail at either lateral side of the outer rail such that the link rail conceals a clearance formed between the outer rail and the wall and passing screws through the link rail and the outer rail into the packing rail to keep the outer rail firmly in place, and fitting a seal strip onto the link rail to accomplish an integral plastic door frame, which is cut at 45 degrees at appropriate positions to obtain an inverted-U shaped door frame with the lateral sides perpendicular to the top side.

Abstract: The invention relates to a linear connector of plastic material for joining two parallel hollow spacing profile tracks or hollow bar profile tracks of multiple insulating glass units used for windows to reduce heat loss from building interiors and forming the frame between two glass panes of such a multiple insulating glass unit and surrounding such glass unit, which frame having two ends which are to be connected to one another by the linear connector, characterized in that the linear connector includes two pairs of two distantly separated parallel legs extending in longitudinal direction of the spacing profile tracks of the frame which are to be connected to one another and being adjacent to an abutment rib extending accross these longitudinally extended legs, which abutment rib is provided with front faces being engaged by the front faces of the hollow profile spacing tracks if the linear connector is in mounted condition.

Abstract: A structure of a door frame including four rails each formed with a first passage at one side, a second passage at an intermediate portion, a third passage at another side, a first slot at an edge, a second slot at a front side, a third slot at the front side, a fourth slot at another side, and a raised portion at a rear side, four right-angled connectors formed with a first shoulder at one side, a central block, and a second shoulder at another side adapted to be inserted into the first, second and third passages, four auxiliary locking members each fixedly installed into the third passage and having a slot for passage of electrical wires, four fastening posts each formed with a first groove at one side and a second groove at another side adapted to engage with the raised portion of the rails and right-angled connectors, and covering members arranged on the inner sides of the frame.

Abstract: A metallic frame and the assembly from which it is constructed has a header and a jamb and a means to attach them together at a corner of the metal frame. The header and the jamb each have a soffit disposed inwardly from a rabbet and a stop extending substantially perpendicular to and between the rabbet and the soffit. One of either the header or jamb has terminal ends of a first soffit, a first stop, and a first rabbet that generally lie in the same plane with a first corner edge. A rail slot extends through a width of the corresponding first stop and thicknesses of the first soffit and the first rabbet. The other of the header and a jambs has track formed along a second rabbet between a terminal end of a second rabbet and a terminal end of a second stop and second soffit which are cut back and spaced a distance from the terminal end of the second rabbet such that the track and the rail slot are slidingly engageable.

Abstract: The kick resistant door assembly comprises a doorway framed by at least two door jamb segments, a door mounted by hinges to one of the segments and a specialized plate assembly which mounts to both a door jamb segment and to adjacent framing studs. The plate assembly has an opening for receiving a bolt and an extended portion for reinforcing the latch of the door against forcible entry. The assembly may further comprise reinforcing rods attached either directly to the hinges or to an intermediate reinforcing hinge plate. In either configuration, upon installation the reinforcing rods extend into the door as well as through the door jamb segment into the wall studs. The assembly may yet further comprise the use of additional plate assemblies mounted adjacent the hinges of the door with the openings of these additional plate assemblies aligned for receiving the reinforcing rods of the hinges.

Abstract: A wooden panel door reinforced against attempted break-in contains layers of fiberglass mat and decorative wooden facing strip bonded to the doorjamb and stiles. The stiles and doorjamb are constructed from wood with grain that runs primarily in a single direction, and reinforcing these stiles and doorjambs against impact can be achieved by bonding to them a fiberglass mat, which contains fibers running in transverse directions. The fiberglass mat is in turn covered by a decorative wooden facing strip layer.

Abstract: A window frame profile for forming into a window frame with a number of other similar profiles includes a separate nailing strip extruded from aluminum and attached to the outer surface of the frame profile. The nailing strip includes a planar strip member and a cylindrical bead portion along one side edge of the strip member. The bead is snap fastened into a cylindrical recess in the outer surface of the frame allowing rotation of the strip about the axis of the bead from a retracted position for transport in which the strip is received in a flat recess on the outer surface. The strip can be rotated from the retracted storage position to an erect position at right angles to the outer surface by rotation about the axis of the bead and snap fastened in the erect position.

Abstract: A reinforced assembly for a door opening includes an elongated reinforcement strip having an L-shaped transverse cross-section of one short leg and one long leg, the long leg for mounting on a door jamb face and the short leg for mounting on a door jamb edge. The short leg has a transverse extent such that upon the reinforcement strip being mounted on a door opening, the transverse extent of the short leg of the reinforcement strip is no greater than the offset distance between the forward edge of the adjacent door casing panel and the door jamb face to which the long leg is mounted. For securing the strip to the door jamb and for receiving the latch of a door, a plurality of spaced openings are formed in the long leg of the reinforcement strip, at least one of the openings being generally rectangular to receive the tongue of a door latch mechanism. The elongated reinforcement strip is adapted to be mounted on a door opening free of modifications to the door jamb, door casing panel and door opening.

Abstract: A vehicular loading dock shelter with opposed hinge gap and head bag closures. For the hinge gap closures, reinforced side curtains seal corner hinge areas, as a truck/trailer is backed into the loading dock, to thereby form a protective weather seal for the sides of the dock. Excessive pull on opposed side curtains is compensated by a pair of single leaf spring-loaded hinge assemblies, connecting the respective curtains to corresponding shelter side frames of the front walls. These hinge gap closures having side curtains for are each adapted to set the side curtains parallel to the door of the dock in the normal closed position, when the dock is not in use.

Abstract: In a fabricated door jamb, the opposite edges of a rib component core of low-grade lumber are faced with strips of high-grade wood, and the face is veneered. Two flange components are fabricated from cores of low-grade lumber, each having one edge finished with a strip of high-grade wood, and their faces are veneered. The flange components are joined to the generally central edge component by tongue-and-groove joints composed of tongues formed on the adjacent edges of the flange components which fit snugly in the grooves in opposite edges of the tongue component, respectively. Each groove is flared and each tongue is tapered complementally so that the tongues fit snugly and wedgingly in the grooves, the tongue-and-groove joints being located so that the backs of the tongue component and of the two flange components are flush and coplanar.

Abstract: A refrigerator door construction is disclosed which includes door rail elements formed from a foamed polymeric substance. At least one substantially transparent panel is supported, retained by and sealed in the door rail. Connection elements are provided for connecting the door rail elements. At least one hinge is provided for allowing pivotal movement of the door about an axis. The foam rail element may also form one or more spacer elements between adjacent panels so that separate, discrete spacer bars may be eliminated.

Abstract: A building aperture frame system including a window mounting surface and an integrally-formed storm shutter mounting structure. The frame system may include of first and second elongated profiled jambs, an elongated profiled header mounted to and traversing a distance between an upper portion of each of the first and second jambs, and an elongated profiled sill mounted to and traversing a distance between a bottom portion of each of the profiled jambs. Each of the profiled jambs, header and sill have a width sufficient to traverse at least a portion of a distance between an interior and an exterior surface of a building wall defining a building aperture. Alternatively, the building aperture frame system may include of first and second profiled jambs capable of extending vertically along first and second vertical side walls of a building aperture. Each of the profiled jambs is capable of extending along a horizontal distance of at least a portion of the vertical side walls.

Abstract: The present invention relates to a heat insulating door wall structure for use in a refrigerator or the like. By constituting the surface of the door with a colored glass plate or the like having a transparent layer at its front surface and a colored layer at its reverse surface, a deep luster is provided by the transparent glass plate located before the colored layer. Owing to high rigidity of the glass plate, undulations that may be formed on the front surface of the door by contraction of a heat insulating material filled through expansion or foaming, or by warping of the door due to temperature differences between the exterior and interior of the door are advantageously prevented. Moreover, by increasing the strength of the door, reinforcing members of the door can be dispensed with, for a simple construction and a reduction in cost.

Abstract: A new interior wall construction relies on a new metal stud. The new stud is a U-shaped channel having parallel sides and a generally flat bight. The bight is recessed interiorly of its edges and mounts a wood block. The block is secured by diagonally inserted screws piercing the interior corners of the recess. A sheet rock installer mounts the plaster board so as to have common edges with the stud. Thereafter a carpenter inserts a wood blocking in the stud prior to mounting the door jamb.

Abstract: A vehicle tilt-out window with a resilient seal insert includes an annular frame which is bonded to the vehicle window opening. The frame includes a resilient double lip seal which is molded into a recess formed in the frame and the lip seal cooperates with a glass panel mounted upon the frame by homogeneous hinge tabs extending from the frame permitting the glass panel to be tilted relative to the frame for ventilation purposes and an articulated pivoting latch mounted to a homogeneous latch base locks the glass panel against the lip seal.

Abstract: The present invention provides a variable angle wedge that supports a replacement window and compensates for whatever sill angle exists on the previous window frame. A flange opposite the variable angle extends between a window engaging member and a sill engaging member. The angle defined between the window engaging member and the sill engaging member can be decreased by removing a distal portion of the flange.

Abstract: A modification of the Z-bar mount portion of the door hinge mount to raise the hinge mount flat portion at its upper portion where the curvilinear bridge piece is located between the insulating mount portion and the hinge portion to extend the extrusion to form a cover stop around the hinge to a point essentially flush with a plane perpendicular to the door lateral edge and overlying the hinge is disclosed. This produces a rounded pleasing cover stop which masks the hinge from the exterior. Also, it inhibits the door from opening at an angle more than 90.degree. from the closed position, which with the pneumatic closer and safety chain produces a three-way redundant system to resist the door blowing off its mount or hinge. In addition, it further blocks the access of strong winds from penetrating the areas between the knuckles of the hinge and the space between the door and mount.

Abstract: A door frame reinforcing plate used for reinforcing a door frame adjacent a lock striker. The reinforcing plate is comprised of a flat plate section adapted to be secured over an interior flat surface of the frame adjacent the lock striker. The flat plate section has a lock bolt opening therein adjacent a first end of the plate section where the plate is bent at right angle to form a flange to overlie an edge surface portion of the door frame. A plurality of holes are provided in the plate above and below the opening for receiving connecting screws which secure the lock striker. A further series of holes is provided in the plate section to receive fasteners which are secured to the frame from an exterior surface of the frame. The reinforcing plate is not visible from outside the door frame, as it is concealed behind the door frame and behind the usual frame moldings.

Abstract: A rooftop access for an HVAC sheet metal enclosure is provided by cutting a T-shaped opening in a wall of the enclosure and inserting a frame with a door and a peripheral flange, the upper portion of which is inserted through the slot at the top of the opening. The flange upper portion includes a flashing, projecting over the frame below.

Abstract: An extruded aluminum window frame is shown having a thermal barrier held in place within the extrusion by channels having circular C-shaped insulation end pockets. An extrusion bridge is preferably located between the circular C-shaped insulation pockets in skip-debridged form within a polyurethane thermal barrier or may be conventionally located below the polyurethane thermal barrier for entire removal.

Abstract: A door frame and gusset system for attaching a hinge for supporting a door. The door frame includes an emboss indentation having a universal set of openings which can match a plurality of different screw hole patterns for hinges.

Abstract: The section has a tubular shape with a substantially polygonal cross-section, provided with two larger faces (1, 2) opposite to one another and two smaller faces (3, 4) forming a connection with said larger faces, which extend in abutment elements (5, 6) suitable for defining with said larger faces the inner front and the outer front, respectively, of the window or door frame. The two larger faces (1, 2) comprise respective central portions (11, 12) parallel to one another provided with flaps (13, 14) defining C-shaped cavities (15, 16) for housing and connecting various members of the window or door frame. Each larger face also comprise lateral portions (17, 19; 18, 20) converging towards the corresponding lateral portions of the other larger face until they connect with the smaller faces. The section includes a hole (21) for drainage purposes.

Abstract: An extruded plastic frame window sash in which the frame has a closed hollow body cross section with a recess extending into the hollow body from the outer periphery of the frame. The individual frame members are held together around a window pane by a tensioned band disposed within the recess and engaging each of the frame members. The tension band extends about the entire sash frame and is joined together at its end to maintain the tension in the band holding the frame together. The walls of the recess reinforce the frame members to prevent deflection induced by the tensioned band.

Abstract: A jamb assembly is used to form a door frame system for installation within a wall having an opening for a door. The jamb assembly comprises a first elongated member having an L-shaped shoulder along one side of the member. A groove running parallel to the shoulder extends the length of the member. The jamb assembly has a second elongated member identical to the first member. The members are inverted relative to one another so that the L-shaped shoulders of the first and second members fit together to form an expandable base of the jamb assembly. A third elongated member has a tongue projecting on one side thereof that extends the length of the third member. The tongue is formed to fit into the groove of the first or the second elongated member to form a cap for the jamb assembly. The tongue extends beyond the ends of the first and second members when the jamb assembly serves as a head jamb assembly.

Abstract: A refrigerator door construction is disclosed which includes door rail elements formed from a foamed polymeric substance. At least one substantially transparent panel is supported, retained by and sealed in the door rail. Connection elements are provided for connecting the door rail elements. At least one hinge is provided for allowing pivotal movement of the door about an axis. The foam rail element may also form one or more spacer elements between adjacent panels so that separate, discrete spacer bars may be eliminated.

Abstract: End portions (10) of a tap plate (A) are welded to a metal door frame (B) with welding projections (12). The tap plate (A) has a front face (18) which is recessed from a rabbet surface (22) of the door frame by a thickness (24) of a heavy-weight hinge leaf (26). Adjacent each of the tapped bores (30) for receiving a hinge leaf mounting bolt (32), a button (40) projects forward from the tap plate front face. The buttons project forward by a difference (54) between the thickness of the heavy-weight hinge leaf and a thickness (56) of a standard hinge leaf (58). Each of the buttons defines a necked-down portion (44) around its periphery. The projecting portion of the button is removed to mount a heavy-weight hinge leaf (FIG. 3). With the buttons still in place, a standard-weight hinge leaf is mounted to the tap plate with its front face flush with the rabbet surface of the door frame (FIG. 6).

Abstract: A door frame having excellent fire-resistance, flexural strength and screw holding properties is fabricated from gypsum fiberboard, specifically a gypsum fiberboard having a density of at least 60 lbs./cu.ft., a flexural strength of at least about 30 lbs. (1/2" thick material), and a screw holding capability of at least about 400 lbs. A preferred gypsum fiberboard material for fabrication of the door frame comprises a composition containing a substantially uniform dispersion of solids including by weight about 65% to 90% set gypsum, about 7% to about 30% pulped paper, up to about 9% binder, and about 0.8% to 2% inorganic fiber. A wood veneer is preferably applied to the visible faces of the gypsum fiberboard door frame members.

Abstract: A loading dock shelter with head pad assembly and hinge gap closure wherein reinforced side wing assemblies seal corner/hinge areas, as a truck/trailer backs into the loading dock, to thereby form a protective weather seal for the dock. Respective side wings for right and left portions of the shelter are cantilevered to set the wings outwardly of the door of the dock, when the dock is in use, thereby filling the gap between door jamb and truck/trailer open doors. Each attached side wing is thus extended outwardly to seal the gap between trailer and dock shelter. The semi-flexible nature of the wings permits each one to set itself against the inside of vehicular open doors, notwithstanding possible off-center positioning of the vehicle. This head pad assembly is so conformed that its effective life is extended over the norm.

Abstract: A lightweight steel/wood earthquake brace for existing or new residential garage front wall. In the preferred embodiment, folded sheet metal legs are bolted together to form a rigid L-bracket. Symmetrical L-brackets are bolted to the garage door wood header and to the concrete footing to stiffen the wall against wind or earthquake. In another embodiment the steel members are connected with protruding tabs and holes.

Abstract: A glazing pocket filler is disclosed for use with a frame member having a glazing pocket of predetermined width for receiving a lateral edge of an infill panel. The glazing pocket filler comprises a filler panel having a length substantially corresponding to the width of the glazing pocket. A spring leg extends inward and forward from the filler panel and has a bearing surface located at a forward end thereof. The spring leg is configured such that when the filler panel is positioned across the glazing pocket, the bearing surface of the spring leg engages an inwardly convex portion of the frame member's forward glazing pocket wall to bias the rearward edge of the filler panel into engagement with the interior glazing pocket edge formation. Simultaneously the spring leg biases the inward face of the filler panel snugly against the outer edges of the frame member's front and rear glazing pocket walls. In this manner the filler panel is maintained in close engagement with the frame member.

Abstract: The buck frame is in a one-piece construction and is designed to be embedded in a poured concrete wall. The exterior of the buck frame is provided with reinforcing ribs, while its interior surfaces form a centrally-located boss, the side faces of which are provided with lips and grooves to releasably retain a window frame, made of four separate interfitting parts. A resilient polyurethane board is fitted between the lintel part of the window frame and the registering boss of the buck frame to provide for installation and removal of the horizontally-slidable window panes and also of the window frame parts.

Abstract: A U-shaped corner clip for use with mitered corners of first and second hollow frame members. One leg of the clip has a hook to engage an opening in the outer edge of a first frame member. The other leg is insertable through an opening in the second frame member but has a length such that it passes from the interior of the second frame member into the interior of the first frame member and there resiliently bears on the inner face of the inner edge of the other frame member. Thus, any force tending to rotate the frame members apart in a direction to increase the angle therebetween is resisted by the action of the second leg member on the first frame member. The clip also resists any force tending to move the frame members linerally away from each other in any direction.

Abstract: A sheet metal door frame formed by a substantially horizontally arranged U-shaped head piece and a pair of substantially vertically arranged likewise U-shaped jambs. The jambs preferably have square-cut ends which are arranged to extend into cut-outs at opposite ends of the head piece. The head piece and jambs present side walls, each of which terminates in a free longitudinal end at which an outwardly bent flange is provided for attachment of architraves. The head piece may additionally have hook-shaped end portions formed in its side walls at its opposite ends. These hook-shaped end portions are arranged to overlap end portions of the corresponding side walls of the jambs so as to engage the outwardly bent flanges of the jambs.

Abstract: A synthetic door frame includes an interior channel into which mounting members are fitted for securing the synthetic door frame to a building. The synthetic door frame further includes a cap which fits over the channel and covers the frame mounting members.

Abstract: A door or window assembly comprising a rigid first frame (1) defining an opening, and a second frame (9) adapted to be fitted into and close off the opening in the first frame (1), the first frame (1) being at least partly or wholly hollow and having a surface part with an opening (4) leading into a channel section (2) partly defined by side walls (6) of the said first frame (1), the second frame (9) including retaining means (12) of which a part can enter said channel section (2) through said opening (4) and thereafter securely engage the first frame (1) to prevent the second frame (9) from being withdrawn from the first frame (1).

Abstract: A construction kit for horizontally and vertically sliding window assemblies in which each window includes a sash. A meeting rail is connected to each sash and includes a slot at each of the inner and outer surfaces of the meeting rail. Weather stripping is fitted into the slot at outer surface of the meeting rail and is wrapped around the end of the meeting rail and secured within the slot at the inner surface of the meeting rail.

Abstract: A multi-pane insulated glass door assembly in which the forward pane of the glass unit extends outwardly a greater distance than the panes rearwardly thereof and is supported by an outer metal frame having a relatively narrow forwardly extending perimeter portion adjacent the peripheral edge of the forward glass pane so as to provide the door with a modernistic, substantially all glass front appearance. In one embodiment, the outer metal frame has a rear portion extending inwardly behind the forward glass pane and a molding is interposed between the forwardly extending perimeter portion of the metal frame and the peripheral edge of the forward glass pane to provide a finished appearance. A dark ink is affixed to an inside peripheral face of the forward glass pane for masking the peripheral components of the door assembly from sight through the forward glass pane from the front side thereof.

Abstract: A reinforcing plate for reinforcing a doorjamb to prevent break-ins and particularly kick-ins of the door by unauthorized persons is mounted in back of the doorjamb in the space between the jamb and the door frame. In order to install the reinforcing plate behind the doorjamb, the interior trim strip is removed from the door frame and the reinforcing plate is mounted behind the doorjamb, preferably by the use of shims to temporarily jam the plate between the doorjamb and the door frame. While the reinforcing plate is temporarily secured by a wedging means against the back of the door frame, holes are drilled in the door frame and through the reinforcing plate using appropriately-sized drill bits. Self-tapping threaded screws are then passed through the doorjamb and screwed tightly into the reinforcing plate the attach the plate to the doorjamb and reinforce the jamb. As an alternative, special fastenings are provided to fasten the striker plate to the reinforcing plate.

Abstract: A door assembly having hidden screw construction includes a plurality of elongated brackets positioned around the side jambs and header of a door opening. The brackets each include elongated U-shaped channels extending along the length thereof. Screws are threaded through the bottom walls of the channels into the frame of the door so as to secure the brackets to the door. An elongated cover strip extends along the length of each channel and is detachably secured thereto in covering relation over the heads of the screws to hide the heads of the screws from view.

Abstract: A door frame is prefabricated at remote construction sites and is installed into wall openings without requiring substantial on-site fittings, moldings, trims, and attachments. The door frame includes a header jamb and header grooves. A header scribe strip is fitted to and disposed in one of the header grooves. Header spring means are disposed in said header groove and are pressing the header scribe strip outwardly. Header plate means are pivotally attached to the side of the frame facing the opening face of the wall opening and disposed such as to assume a first locking position. A first and a second side jamb each have a first end attached to the header jamb and have a first and a second side groove. A first side scribe strip and a second side scribe strip are in each case fitted to and disposed in one of the respective side grooves. First and second side spring means are disposed in each case in the respective side grooves and press the respective side scribe strip outwardly.

Abstract: A reversible hinge door assembly includes a pair of door brackets fitted on the opposite edges of the door to be mounted. The door brackets each include longitudinal channels for receiving a hinge bracket. The hinge bracket may be mounted in either of the hollow channels of the door brackets at the opposite edges of the door. The hinge is mounted to the door bracket. The hinge may be reversed from one side of the door to the other by sliding the hinge bracket out of the channel in the door bracket on one side of the door and by reinserting it into the hollow channel of the door bracket on the other side of the door.

Abstract: An improved door sill construction. The sill includes a core including a form made from spun class fibers treated with a polyester resin. The spun glass fibers are oriented in both lineal rows and random mats in order to maximize strength. The sill further includes a cladding coating the form which is stable to ultraviolet radiation.

Abstract: A one-piece metal frame fin is locked to the wooden frame members of a window unit by exterior cladding. A notch in the frame members receives the inner portion of the nailing fin while the outer portion of the fin is recessed into the wood when the fin is in its closed position for storage, transport and use in abutting frame members of multiple window units. An L-shaped corner nailing fin is carried on one of the frame fins and can be pivoted into locking engagement with the adjacent frame fin during installation of the window unit. In the case of joined multiple window units a mullion cover extends over the adjacent ends of the frame nailing fins and is locked to the outer nose portion of the exterior cladding. Use of foam sealing strips eliminates the need for on the job site caulking.