US3198297A

US3198297A - Door and window structures for buildings

Info

Publication number: US3198297A
Application number: US326323A
Authority: US
Inventors: Roger J Halle
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-06-22
Filing date: 1963-11-21
Publication date: 1965-08-03
Anticipated expiration: 1982-08-03

Description

2 Sheets-Sheet 1 R. J. HALLE I06 ae DOOR AND WINDOW STRUCTURES FOR BUILDINGS Aug. 3, 1965 Original Filed June 22, 1953 Y we N a N 50 V T m m Ell W A HM a e 2. a O n E5 fig: 1 II m u w 3 f S? w a Aug. 3, 1965 R. J. HALLE DOOR AND WINDOW STRUCTURES FOR BUILDINGS Original Filed June 22, 1955 2 Sheets-Sheet 2 ROGER J.HALLE, INVENTOR BY M. -u ATTORNEY United States Patent 4 Claims. or. 189-46) This application is in part a continuation of my copending application Serial No. 129,590, filed August 7, 1961, for Door Structures for Buildings, now abandoned, and is in remaining part a continuation of my cop-ending application Serial No. 129,591, filed August 7, 196-1, for Wi dow Structures for Buildings, now abandoned, and is therefore a continuation of both said applications. Said applications Serial Nos. 129,590 and 129,591 were respectively divisions of my application Serial No. 363,021, filed June 22, 1953, for Art of Building, now abandoned, said application Serial No. 363,021 having been copending with said applications Serial Nos. 129,590 and 129,591. Said application Serial No. 363,021 was a continuation-in-part of my application Serial No. 100,387, filed June 21, 1949, for Methods of Building, now abandoned, said application Serial No. 100,387 having been copendin-g with said application Serial No. 363,021.

This invention relates to door, window, or wall-opening frame means in the art of building and to assemblies of such means. More specifically, the invention relates to a door or window assembly composed of sub-frames joined together in conjunction with or around frame or structural elements of a building to form a unitary door, window, or wall-opening frame.

An important object of the invention is to provide an effective means for attaching door or window frame assemblies to structural elements in a standardized manner, so that door or window frame assemblies are essentially interchangeable with window or door frame assemblies or wall panels. It is a further object of the invention that the door or window frame assemblies may be quickly and readily attached at the site, and when the sub-frames are assembled or joined they will cooperate to provide unitary door or window frames. In the achievement of the above objects, it is also considered important to provide for necessary tolerances, for rapid and easy attachment means and for desired insulation and Weather seals.

Examples of the invention are illustrated in the accompanying drawings, wherein:

FIG. 1 is an isometric, exploded view of a door frame, to show its manner and direction of assembly and association with columns and other elements;

FIG. 2 is a vertical section of a typical door frame, with adjacent portions of wall and floor structure, taken on line 2 of FIG. 3;

FIG. 3 is a horizontal section of the door frame shown in FIG. 2, taken on line 3 of FIG. 2;

FIG. 4 is a horizontal section, similar to FIG. 3, of another assembly, illustrating some alternate details and other conditions possible, within the invention;

FIG. 5 is an isometric, exploded view of window frame, to show its manner and direction of assembly and association with columns and other elements;

FIG. 6 is a vertical section of a typical window frame, with adjacent portions of wall and floor structure, taken on line 6 of FIG. 7;

FIG. 7 is a horizontal section of the window frame shown in FIGv 6, taken on line 7 of FIG. 6; and

FIG. 8 is a horizontal section, similar to FIG. 7, of a still further assembly, illustrating some alternate details and other conditions possible within the invention.

, FIG. 1 shows a door frame utilizing the invention. It

3,198,297 Patented Aug. 3, 1965 is composed of two sub-frames 10 and 11, which are applied in the direction of columns 12 and 13 from opposite sides thereof, and when secured thereto form a complete, unitary door frame. A door can be hung in sub-frame 10, and sub-frame 11 provides the necessary stops for the door. In assembled position, the complete frame 10, 11 is essentially vertically coplanar with and below

panels

14 and 15, which are shown attached to columns 12- and =13 on respectively the same sides as door sub-frames 10 and 11. Sub-frames 10 and 11 consist of head portions 16 and 1-7 and side portions 18, 19. Since the door frame assembly 10, 1 1 is illustrated as for an interior door, no saddle or weather seals are shown. It is understood, however, that saddles and weather seals can be included in the desig for example as in FIGS. 2 and 3, described below.

FIG. 2, in which there is illustrated a vertical section of an assembled frame, shows an exterior sub-frame 20 organized and assembled in conjunction with an interior sub-frame 21 to form a unitary and

complete door frame

20, 21. Exterior sub-frame 20 is essentially composed of a four-sided frame that surrounds a door 22 (shown dotted). The head 23 of the sub-frame 20 consists of a horizontal portion 24, with an upstanding flange 25, to which is attached a panel 26 by a bolt, clip or other suit: able means at 27. It also includes at its outer extremity a short downward-facing flange 28, which acts as a water drip. At its inner extremity it also has a downwardfacing flange 29, which abuts the inner door frame 21 in a manner so as to make possible an adequate weather seal.

The frame has two side pieces, one side piece 30 being described below in connection with the horizontal section shown in FIG. 3. The side pieces connect the head 23 of the door sub-frame with its sill 3'1.

Sill 31 is composed of an essentially horizontal portion 32, having a slightly outward and downward slope, with an extension 33 to provide for the shedding of water in an exterior direction clear of the wall of the building. It also has a downward-facing flange 34.whic-h serves to provide a means for attachment to the panel 35. The sub-frame 20 is att-ached to the panel 35 by means of bolts, clips or the like at 36. An upward facing flange 3-7 at the inner extremity of the sill 31 provides a weather seal.

Interior sub-frame 21, as in the case of exterior subframe 20, is essentially composed of a four-sided frame consisting of a head 40, a sill 41 and two side pieces, one being side piece 4-2. Head 4-0 consists of a portion 44- which at its inner extremity, extends perpendicularly downward and acts as a stop 45 for door 46 (shown dotted). Door stop 45 in turn is joined to portion 47, which separates

doors

22 and 46. The extension 48 of portion 47 acts as a stop for door 22. Flange 49, extending upward from portion 47, abuts downward extending flange 29 of sub-frame 20 to form the aforementioned weather seal. A space at 50 provides for erection tolerance. A flange 51 extending upward from portion 44 serves to provide an attachment means for panel 52, by use of bolts, clips or the like at 53.

As in sub-frame 20, side piece 42 of sub-frame 21 is described in detail in connection with the horizontal section shown in FIG. 3. It connects the head 4-0 or subframe 20 with its sill 41.

Sill 41 consists of forms corresponding with those of head 4-0. It contains a portion 55 which slopes downward slightly toward its extremity 56, thereby more readily accommodating door 46 and making passageover the sill easier. It also has a downward extending flange 57, which rests on floor panel 58. Floor surfacing 59 is shown applied on floor panel 58, which in turn rests on I-bean 60.

In conformity with portion 45 of head 40, the sill 41 contains a vertical portion 61 which serves to act as a stop for door 46. It also contains a spacing portion 62 that corresponds with portion 47 of the head, and flange 63 which corresponds with flange 49 of the head.

FIG. 3, which shows a horizontal section at line 3 of FIG. 2, includes, besides sub-frames 2t and 21, an adjacent pair of

wall panels

64 and 65, a column 66, attaching means 67 and 68 for securing the panels to the column, and attaching means 69 and 71 which secure the subframe side pieces 31? and 42 to the column and which correspond to attaching means 67 and 63 of the panels.

The configuration of the

sides

36 and 42 of

sub-frames

26 and 21 conforms respectively to the configuration of

sub-frame heads

23 and 46. For example, in sub-frame Ztl, portion 71 corresponds with portion 24, and flange 72 corresponds with flange 29. In addition, flange 73 serves to surround and attach sub-frame 2i) to column 66, with attachment by securing means indicated at 69.

Similarly, sub-frame 21 contains flange 74, which surrounds and attaches sub-frame 21 to column 66. The two sub-frames 2t) and 21 when joined together to the column 66 with suitable gasketing (not shown) form a unitary frame 26), 21. It should be noted that suitable provision for assembly or erection tolerances has been allowed, as indicated by spaces at 75, 76 and 77.

FIG. 4 is a horizontal section similar to FIG. 3, and at its left-hand side shows an alternate door frame assembly 86, $1 constituted by sub-frames 36 and S1. The combined, unitary frame $6, 81 is that shown in FIG. 1 as composed of sub-frames 16 and 11. Sub-frames 8i) and 81 attach to column 82 and 83 and 84 in like fashion to attachements 69 and 70 shown in PEG. 3, and allowance is made for similar tolerances. A stop for door 85, resulting from sub-frame 81 extending beyond sub-frame 86, is shown at 36. Panels 87 and 88 attach to column 82 is similar manner to

panels

64 and 65 of FIG. 3.

FIG. 4 also shows a door frame 90, 91 at a location perpendicular to another wall, such as at an exterior wall. A similar condition would occur wherever one wall portion is at right angles to another, and additional example occurring in the case of an exterior corner (not shown). To attach frame 96, 91 composed of sub-frames 9t) and 91, respective angles 92 and 93, which, if desired, can be vertically coextensive with the door frame, are attached to the column 82 through sub-frame 81 and panel 88 by bolts, clips or other suitable attaching means at 84 and 94. Sub-frame W consists of a flat portion 5 at the internal extremity of which a perpendicular portion 96 serves as a stop for sub-frame 91 as well as for door 97 (shown dotted). Sub-frame 96 also includes a flnage 98, which serves to provide an attaching means at 99 to join and secure the two sub-frames 9i and 91 together. At its outer extremity, sub-frame 913 includes a flange 1% which is attached to angle 92 at 161. Sub-frame 91 includes a flat portion 102, which at its internal extermity abuts sub-frame 9d at portion 96. It also includes at right angles to portion 162 a flange 163, which corresponds to flange 100 of sub-frame 9i). Sub-frame 96- and sub-frame 21 are attached to angles 92 and 93 respectively at 161 and 104. Suitable tolerances are provided at 165, 166 and 167.

FIG. shows a window frame utilizing the invention. It is composed of two sub-frames 111i and 111, which are applied in the direction of

columns

112 and 113 from opposite sides thereof, and when joined thereto form a complete, unitary window frame. To provide adequate weather protection and seals, window sash and glazing (which for simplicity and clarity are not shown) are normally mounted in sub-frame 11. while sub-frame 111 serves to unite with sub-frame 1116 around

columns

112 and 113, and when secured thereto, to form the unitary

window frame assembly

116, 111. A setting capable of receiving a fixed piece of glass is shown at 114, but it is to be understood that essentially within the confines of the four sides of sub-frame 110 the necessary forms and details can be incorporated to provide for 4 double-hung, horizontal-sliding, casement, pivoted, projected or other types or combinations of types of sash containing either single or multiple glazing. It is also to be understood that screens can similarly be provided as desired.

In assembled

position sub-frames

119 and 111 are essentially vertically co-planar with and respectively above panels and 116, which are shown attached tocolumns 112 and 113. Sub-frames 111), 111 consist respectively of

head portions

117 and 118, side portions 119 and 12d and

sills

121 and 122.

FIG. 6, in which there is illustrated a vertical section of an assembled frame, shows an exterior sub-frame 125 organized and assembled in conjunction with an interior sub-frame 126 to form a unitary and

complete window frame

125, 126.

Window frame

125, 126 is that shown in FIG. 5 as composed of

sub-frames

110 and 111. Exterior sub-frame 125 is essentially composed of a foursided frame that surrounds window glazing. The head 127 of

frame

125, 126 consists of a horizontal portion 128, with an upstanding flange 129, to which is attached a panel 136 by bolt, clip or other suitable means at 131. Head 127 includes at its outer extremity a downward sloping extension 132 which is capable of shedding water, and which includes at its under side a water drip. At its inner extremity it has a downward extension 133 which serves to act as a stop for fixed glazing 134, which is secured in place by stop 135 as attached at 136. A horizontal internal extension 137 of portion 133 overlaps and acts as a closure with the horizontally extending portion 139 of the head 138 of sub-frame 126. The head portion 139 also has an upward extending flange 140, which provides a means for attachment of closure strip 141, which in turn extends against ceiling panel 142. Ceiling panel 142 is attached to an I-bearn 143 of the building frame by suitable means at 144. Appropriate tolerances providing spacing to permit necessary adjustment in assembly and erection are shown at 145, 146, 147, 148 and 149.

Sill 156 of sub-frame 125 corresponds with and is connected to head 127 by means of side piece 152. Similarly, sill 151 of sub-frame 126 corresponds with and is connected to head 138 by side piece 153. The

side Pieces

152 and 153 are described in detail in connection with the horizontal section shown in FIG. 7.

Sill 1511 consists of an essentially horizontal, slightly downward and outward sloping portion 155 terminating at its outer extremity in an extending portion 156 capable of shedding water outside the walls of the building. It also includes a downward-facing flange 157 shown attached to panel 158 by bolt, clip or other attaching means at 159. At the inner extremity of portion 155, an upward extending flange 160 serves to act as a stop for window glazing 134, which is attached by stop 162. Stop 162 corresponds to stop 136 of head 127, and is secured by suitable means at 163. Extension 164 of portion 160 overlays the inner sill 151 to provide a suitable closure.

Sill 151 is composed of a horizontal element 165 with downward extending flange 166 attached to a panel 167 below it by bolt, clip or other suitable means at 168.

FIG. 7, which shows a horizontal section at line 7 of FIG. 6, includes, besides

sub-frames

125 and 126, a pair of

adjacent wall panels

170 and 171 and attaching

means

172, 173, 174 and 175 for securing the frames and panels to the building column 176. The configuration of the

side pieces

152 and 153 of

sub-frames

125 and 126 conforms respectively to the configuration of the

heads

127 and 138 of

sub-frames

125 and 126. Thus, specifically, portion 177 conforms with portion 128; portion 178 with portion 133; portion 179 with portion 137. Glazing stop 180 is shown attached to sub-frame 125 at 181. Suitable tolerance is shown at 183, 184, and 186.

FIG. 8 is a horizontal section similar to FIG. 7, and at its left-hand side shows an alternate window frame assembly 1%, 191 constituted by sub-frames and 191. Sub-frames 1% and 191 are attached to column 192 at 193 and 194 in a similar manner to that shown in FIG. 7 in connection with column 176 and similar allowance is made for tolerances. A casement or projected type sash with glazing is shown at 195, with conforming step-like configuration in sub-frame 190 at 196, fitting the flanged structure of the sash frame 195.

While exterior sub-frame 190 contains the window sash 195, interior sub-frame 191 serves to complete the

unitary frame

190, 191 around column 192, with closure effected through the flange overlap at the side pieces of the subframes at 197. Suitable tolerance is shown as in FIG. 7. Standard wall panels are shown at 193 and 199.

FIG. 8 also shows a

window frame

200, 201 in a location perpendicular to another wall, the example illustrated indicating an exterior wall condition. A similar condition would occur wherever one wall portion i at right angles to another, an additional example existing in the case of a simple outside corner (not shown). To attach the

frame

200, 201 composed of

sub-frames

200 and 201,

respective angles

202 and 203 are attached to column 192 respectively through sub-frame 190 and panel 198 by bolts, clips or other suitable attaching means at 194 and 204. Sliding or double-hung

glazed sash

205 and 206 are accommodated at side piece 207 of exterior sub-frame 200 by means of conforming configuration, such as the vertical trackways shown. A frame containing screening is shown at 208. Side piece 207 also includes a flange 209 which is attached at 210 to angle 202, which, if desired, can be vertically coextensive with the window frame. Side piece 211 of interior sub-frame 201 is attached to similar angle 203 at 212.

Side pieces

207 and 211 include flange extensions which overlap and can be attached at 213 to join the

sub-frames

200 and 201 into the complete, unitary

window frame assembly

200, 201.

While various examples and conditions have been shown, it is to be understood that the invention is not limited to the specific forms or conditions herein illustreated and described, but may be carried out in other ways and with other details without departure from the principles of the invention. In addition, while, for simplicity, no gasketing, weather-stripping or window or door hardware has been shown, it is to be understood that these can be included in conventional manner. Similarly, in windows, other types of sash can be accommodated; or sash can be omitted, or in door frames, doors can be omitted, so that frames become merely wall-opening frames without sash or glazing or doors, with details modified as may be desired. Also, the frames indicated may be enlarged or otherwise modified to include alternate details, such as those for single or double standard-hinged, horizontal-sliding, double-acting, pivoted, pin-jointed or projected doors or for revolving doors.

I claim:

1. In a building, in combination with a pair of spaced columns which are aligned in a wall assembly of the building and which have an identical square enveloping contour in cross-section, each column being disposed with opposite faces thereof at respectively opposite sides of the wall assembly, a door frame composed of two prefabricated, substantially congruent, unitary sub-frames applied to opposite sides of the aforesaid columns, said sub-frames each having vertical sides respectively along the columns and a portion at the top of the vertical sides extending between the columns, to define a door opening, said sub-frames being mutually dimensioned and fitting together, inwardly of the opening, to form said door frame and to constitute it as a door-receiving form, each of said sub-frames having structure which faces the opening along both sides and the top, the opening-facing structure of one sub-frame including a portion which overlaps a portion of the opening-facing structure of the other sub-frame, said portions being shaped so that they may be brought into said overlapping relation upon insertion of said subframes between the columns from respectively opposite sides of the Wall assembly, at least of the vertical sides one of said sub-frames including structure extending inwardly of the opening to constitute a closure abutment for a door hung in the assembled door frame, each of said sub-frames having vertical flanges along both of its vertical sides disposed to be parallel with said. wall assembly and arranged in flatwise overlapping abutment on the adjacent one of the aforesaid faces of the adjacent column, each of said flanges being dimensioned to overlap said adjacent column face by a distance equal to about one-half the width of said column face, said subframes being secured to the columns in assembled relation of the door frame, and at least one wall panel joined to one of the columns and having a flat portion overlapping one of the said faces of said last-mentioned column by about half the width thereof, said panel extending in the plane of the wall assembly adjacent said last-mentioned column face, in a direction away from the column on the other side thereof from the door frame, said overlapping panel portion and the adjoining vertical flange of one of the sub-frames being aranged so that neither overlaps the other and so that they together substantially cover said last-mentioned column face, and being shaped and dimensioned for each to cover only one-half of the width of the column face, in a manner characteristic of interchangeability of such panel and such door sub-frame in respect to the attachment of such panels and door frames to columns.

2. In a building, the combination as defined in claim 1, which includes a second wall panel also joined to the column to which the first panel is joined and having a flat portion overlapping the opposite face of said lastmentioned column by about half the Width thereof, said second wall panel extending in the plane of the wall assembly adjacent said last-mentioned opposite column face in a direction away from the column on the other side thereof from the door frame, and said overlapping portion of the second panel and the adjoining vertical flange of one of the sub-frames being arranged so that neither overlaps the other and so that they together substantially cover said last-mentioned opposite column face, and being shaped and dimensioned for each to cover only one-half of the width of the said opposite column face, in a manner characteristic of interchangeability of such panel and such door sub-frame in respect to the attachment of such panels and door frames to columns.

3. In a building, in combination with a pair of spaced columns which are aligned in a wall assembly of the building and which have an identical square enveloping contour in cross-section, each column being disposed with opposite faces thereof at respectively opposite sides of the wall assembly, a window frame composed of two pie-fabricated unitary, substantially congruent, openingdefining frame portions shaped to adjoin the columns and extend across the space between them and dimensioned and arranged in mutually fitting engagement to constitute the aforesaid window frame, said frame portions being respectively insertable between the columns on opposite sides of the wall assembly and being secured to the columns in assembled relation of the window frame, each frame portion having vertical sides respectively along the columns and portions respectively at the top and bottom extending between the columns, said vertical sides of one of the frame portions being arranged to overlap the corresponding vertical sides of the other frame portion and being shaped so that said .frame portions may be brought into said overlapping relation upon insertion of said frame portions between the columns from opposite sides of the wall assembly, each of said frame portions having vertical flanges along both of its vertical sides disposed to be parallel wtih said wall assembly and arranged at flatwise overlapping abutment on the adjacent one of the aforesaid faces of the adjacent column, each of said flanges being dimensioned to overlap said adjacent column face by a distance equal to about onehalf the width of said column face, and at least one Wall panel joined to one of the columns and having a flat portion overlapping one of the said faces of the lastrnentioned column by about half the Width thereof, said panel extending in the plane of the Wall assembly adjacent said last-mentioned column face in a direction away from the column on the other side thereof from the Window frame, said overlapping panel portion and the adjoining vertical fiange of one of the frame portions being arranged so that neither overlaps the other and so that they together substantially cover said last-mentioned column face, and being shaped and dimensioned for each to cover only one-half of the width of the column face, in a manner characteristic of interchangeability of such panel and Window frame portion in respect to the attachment of such panels and window frames to columns.

4. In a building, the combination as defined jlT'ClZlliiL 3, which includes a second wall panel also joined to the column to which the first wall panel is joined and having a fiat portion overlapping the opposite face of said lastmentioned column by about half/the width thereof, said second Wall panel extending in the plane of the wall assembly adjacent said last-mentioned opposite column face in a direction away from the column on the other side thereof from the window frame, and said overlapping portion of the second panel and the adjoining vertical flange of one of the frame portions being arranged so that neither overlaps the other and so that they together substantially cover said last-mentioned opposite column 8 face, and being shaped and dimensioned-for each to cover only one-half of the Width of the said opposite column face, in a manner characteristic of interchangeability of such panel and window frame portion in respect to the attachment of such panels and Window frames to columns.

References Cited by the Examiner UNITED STATES PATENTS 1,995,764 3/35 Bohnsack 189-46 2,454,523 11/46 Philip 2011 References Elites by the Applicant UNITED STATES PATENTS 1,948,662 2/34 Tracy.

2,293,648 8/42 Horn.

2,454,523 11/48 Philip.

2,582,765 1/52 Brew.

2,728,956 1/56 Jackson.

2,742,602 4/ 56 Tolman.

FOREIGN PATENTS 57,077 3/44 Netherlands. 60,343 12/47 Netherlands.

CHARLES E. OCONNELL, Primary Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No, 5,198,297 August 3, 1965 Roger J" Halle It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 2, 1111a 69, for "I -bean" read I beam column 3, line 30, for "and 83" read at 83 line 31, for "attachements" read attachments line 35, for "is" read in line 39, for "and" read 7 an 11.ne 48, for "flnage" read flange column 6, line 30, after "first" insert e wall line 69, for "wtih" read T with column 8, llne 21, for "2, 42,602" read 1 2, 42,117 r S1gned and sealed this 28th day of June 1966K (SEAL) Attest:

ERNEST W. SWIDER EDWARD J. BRENNER Attesting Officer Commissioner of Patents

Claims

1. IN A BUILDING, IN COMBINATION WITH A PAIR OF SPACED COLUMNS WHICH ARE ALIGNED IN A WALL ASSEMBLY OF THE BUILDING AND WHICH HAVE AN IDENTICAL SQUARE ENVELOPING CONTOUR IN CROSS-SECTION, EACH COLUMN BEING DISPOSED WITH OPPOSITE FACES THEREOF AT RESPECTIVELY OPPOSITE SIDES OF THE WALL ASSEMBLY, A DOOR FRAME COMPOSED OF TWO PREFABRICATED, SUBSTANTIALLY CONGRUENT, UNITARY SUB-FRAMES APPLIED TO OPPOSITE SIDES OF THE AFORESAID COLUMNS, SAID SUB-FRAMES EACH HAVING VERTICAL SIDES RESPECTIVELY ALONG THE COLUMNS AND A PORTION AT THE TOP OF THE VERTICAL SIDES EXTENDING BETWEEN THE COLUMNS, TO DEFINE A DOOR OPENING, SAID SUB-FRAMES BEING MUTUALLY DIMENSIONED AND FITTING TOGETHER, INWARDLY OF THE OPENING, TO FORM SAID DOOR FRAME AND TO CONSTITUTE IT AS A DOOR-RECEIVING FORM, EACH OF SAID SUB-FRAMES HAVING STRUCTURE WHICH FACES THE OPENING ALONG BOTH SIDES AND THE TOP, THE OPENING-FACING STRUCTURE OF ONE SUB-FRAME INCLUDING A PORTION WHICH OVERLAPS A PORTION OF THE OPENING-FACING STRUCTURE OF THE OTHER SUB-FRAME, SAID PORTIONS BEING SHAPED SO THAT THEY MAY BE BROUGHT INTO SAID OVERLAPPING RELATION UPON INSERTION OF SAID SUBFRAMES BETWEEN THE COLUMNS FROM RESPECTIVELY OPPOSITE SIDES OF THE WALL ASSEMBLY, AT LEAST ONE OF SAID SUB-FRAMES INCLUDING STRUCTURE EXTENDING INWARDLY OF THE OPENING TO CONSTITUTE A CLOSURE ABUTMENT FOR A DOOR HUNG IN THE ASSEMBLED DOOR FRAME, EACH OF SAID SUB-FRAMES HAVING VERTICAL FLANGES ALONG BOTH OF ITS VERTICAL SIDES DISPOSEAD TO BE PARALLEL WITH SAID WALL ASSEMBLY AND ARRANGED IN FLATWISE OVERLAPPING ABUTMENT ON THE ADJACENT ONE OF THE AFORESAID FACES OF THE ADJACENT COLUMN, EACH OF SAID FLANGES BEING DIMENSIONED TO OVERLAP SAID ADJACENT COLUMN FACE BY A DISTANCE EQUAL TO ABOUT ONE-HALF THE WIDTH OF SAID COLUMN FACE, SAID SUBFRAMES BEING SECURED TO THE COLUMNS IN ASSEMBLED RELATION OF THE DOOR FRAME, AND AT LEAST ONE WALL PANEL JOINED TO ONE OF THE COLUMNS AND HAVING A FLAT PORTION OVERLAPPING ONE OF THE SAID FACES OF SAID LAST-MENTIONED COLUMN BY ABOUT HALF THE WIDTH THEREOF, SAID PANEL EXTENDING IN THE PLANE OF THE WALL ASSEMBLY ADJACENT SAID LAST-MENTIONED COLUMN FACE, IN A DIRECTION AWAY FROM THE COLUMN ON THE OTHER SIDE THEREOF FROM THE DOOR FRAME, SAID OVERLAPPING PANEL PORTION AND THE ADJOINING VERTICAL FLANGE OF ONE OF THE SUB-FRAMES BEING ARRANGED SO THAT NEITHER OVERLAPS THE OTHER AND SO THAT THEY TOGETHER SUBSTANTIALLY COVER SAID LAST-MENTIONED COLUMN FACE, AND BEING SHAPED AND DIMENSIONED FOR EACH TO COVER ONLY ONE-HALF OF THE WIDTH OF THE COLUMN FACE, IN A MANNER CHARACTERISTIC OF INTERCHANGEABILITY OF SUCH PANEL AND SUCH DOOR SUB-FRAME IN RESPECT TO THE ATTACHMENT OF SUCH PANELS AND DOOR FRAMES TO COLUMNS.