US3239984A

US3239984A - Refractory wall and nose construction

Info

Publication number: US3239984A
Application number: US354935A
Authority: US
Inventors: Louis H Hosbein
Original assignee: MH Detrick Co
Current assignee: MH Detrick Co
Priority date: 1964-03-26
Filing date: 1964-03-26
Publication date: 1966-03-15
Anticipated expiration: 1983-03-15
Also published as: DE1526160C3; GB1075921A; DE1526160B2; DE1526160A1

Description

March 15, 1966 L. H. HOSBEIN 3,239,934

REFRACTORY WALL AND NOISE CONSTRUCTION Filed March 26, 1964 4 Sheets-Sheet 1 INVENTOR. Lou 15' h. Hosbeu 4 Sheets-Sheet 2 L. H. HOSBEIN REFRACTORY WALL AND NOISE couswnucwxow Filed March 26, 1964 'I If] March 15, 1966 INVENTOR 11011 1.5 H. fiasbez l BY March 15, 1966 L. H. HOSBEIN REFRACTORY WALL AND NOISE CONSTRUCTION Filed March 26, 1964 4 Sheets-Sheet 5 NS W lF mm RN 3 SI Mil Q QQ 3 Q Q as n a a, 5 Mb% m 2 WM a 0. E Y 0 f L United States Patent Ofiiice 3,239,984 Patented Mar. 15, 1966 3,239,984 REFRACTORY WALL AND NOSE CONSTRUCTION Louis H. Hoshein, Glencoe, IlL, assignor to M. H. De-

trick Company, Chicago, Ill., a corporation of Delaware Filed Mar. 26, 1964, Ser. No. 354,935 Claims. (Cl. 52-487) This is a continuation in part of my application Serial No. 90,516, on Multiple Support Refractory Arch and Wall Construction, filed February 196-1, patented May 12, 1964, Patent No. 3,132,447. My invention relates to refractory structures, and more particularly to refractory wall and nose constructions.

My invention relates to refractory structures that are supported from elongated refractory brackets or hanger members that are of a generally rectangular character, and which are each provided with a pair of opposed side faces that are provided with a pair of marginal longitudinally extending ribs and an intermediate rib defining a pair of longitudinally extending grooves in each of said side faces, which are adapted to receive ribs on refractory wall tiles, for suspending said wall tiles from said bracket members.

My elongated refractory bracket or hanger members are adapted for supporting wall tiles in a nose structure, in a curtain Wall structure and in a roof structure. When used in connection with a curtain wall or a nose structure, said refractory bracket members are mounted on a metal framework by means of new and improved metallic bracket members. Each of said refractory bracket members is associated with one of the metal brackets in such a way as to be engaged at one end thereof with the metal bracket and extend horizontally therefrom, acting somewhat like a cantilever beam in supporting the wall tiles that are suspended therefrom or otherwise supported thereby. More specifically, the metallic bracket members are preferably provided with rectangular openings, into which the substantially rectangular in cross section refractory bracket members are received, said openings being provided between a pair of side Walls of said metallic brackets, a fiat top wall connecting said side walls, and a transversely extending wall near the bottom of said side walls, which is provided with a forwardly projecting shelf portion upon which said refractory bracket member is mounted. Preferably said refractory bracket member and said metallic bracket are provided with interengaging means for preventing movement of said refractory bracket member lengthwise of itself relative to the metallic bracket.

It is an important purpose of my invention to provide a nose construction in a furnace structure in which none of the tiles that form said nose construction are of a tapered character, but are all of substantially the same cross sectional area from end toend thereof. Such tiles are easier to manufacture and have greater internal uniform density than tiles of a tapered shape. The more uniform density of the wall tiles, that are used in connection with my invention, provides greater mechanical strength and better thermal properties than would be the case of a tile of a tapered shape.

In utilizing the elongated refractory bracket members extending horizontally frommetallic brackets, I suspend horizontal rows of tiles from said refractory bracket members and other horizontal tiles from these, and so on, in a downward direction from the refractory bracket members to the bottom face of the nose structure, and utilize wall tiles that have flat end faces so that by using tiles of different appropriate lengths, the bot tom horizontal rows of said wall tiles provide a fiat bottom face for the nose structure, so that a substantially rectangular nose structure results, inasmuch as the tiles suspended from the refractory bracket members form a wall that is provided with a vertical face. Because of the fact that there are rows of tiles extending in the same direction as the length of the refractory bracket member, or horizontally of the wall in a direction transversely of the wall, in my improved nose structure, none of the wall tiles that are exposed on the heated faces of the nose structure extend to the outermost cool face of the nose structure. This has the advantage that the thermal expansion of each tile will be more uniform throughout the body of the tile than if this were not the case, and internal stresses due to uneven heating are minimized.

It is another purpose of my invention to utilize such a flat bottom faced nose structure in conjunction with a top wall or roof of a furnace that is made up of wall tiles that have flat end faces to form a roof that has a flat bottom face, whereby the flat bottom face of the roof and the flat bottom face of the nose structure can be aligned so as to form a continuous surface.

It is another purpose of my invention toprovide a refractory curtain wall structure in which the metal brackets and refractory hanger members are used, as above referred to, to suspend rows of refractory wall tiles therefrom, which are interlocked so that all of the tiles of the curtain wall are suspended from the refractory bracket members by their interlocked relationship with the wall tiles adjacent thereto. Said refractory curtain wall structure is provided with a flat bottom face, which is obtained by utilizing wall tiles of different lengths in order to terminate the flat bottom ends of all said bottom rows of tiles in horizontal alignment with each other. My improved refractory curtain structure also has the advantage that the outer cool face thereof is made up of wall tiles that do not extend to the hot inner face of the wall, thus also, in the curtain wall structure, avoiding having tiles that are subjected to a high temperature difference because of having one end or face thereof exposed to the high heat of the furnace and the other end or face thereof a cool face.

One of the purposes of my invention is to provide a refractory bracket or hanger member that is of a sturdy construction, devoid of reduced neck portions that cause weakened places to exist in such refractory members. This is accomplished by providing a refractory bracket or hanger member that has a body portion that is relatively thick, and which has projecting formations thereon extending beyond the sides of the body portion for holding the wall forming refractories or tiles assembled therewith, said body portion being of a rectangular character in cross section except for the projecting formations, which are preferably in the form of the above mentioned longitudinally extending marginal and intermediate ribs.

When using such a hanger or bracket member in a roof structure, I provide a wall structure in which the refractory Wall tiles are mounted on the refractory bracket members and extend inwardly beyond said bracket members on each side thereof to the inner or heat exposed face of the wall, the wall tiles having ribs thereon that engage between a pair of the ribs on the bracket members and extend inwardly beyond said bracket ward movement relative to the bracket members and other refractory wall tiles that are each mounted between a pair of the refractory wall tiles connected withthe bracket members, which other refractory wall tiles are located between the inner face of the refractory bracket member and the inner heat exposed face of the wall, extending from the bracket member to the inner heat exposed face of the wall, all the wall tiles being interlocked with each other by interfitting ribs and grooves.

In all of the structures in which my improver refractory bracket members are adapted to be used as above referred to, the wall tiles are square incross section and of small relative cross section. Thus the massiveness of the hanger member does not in any way interfere with use of wall tiles that are of such a character that the same will have the maximum resistance to cracking or spalling. The wall tiles are preferably of the character disclosed in my co-pending application Serial No. 90,516, now Patent No. 3,132,447.

Other objects and advantages of my invention will appear as the description of the drawings proceeds. I desire to have it understood, however, that I do not intend to limit myself to the particular details shown or described, except as defined in the claims.

In the drawings:

FIG. 1 is a perspective view of a refractory bracket member and the metal bracket with which it is used, showing the same separated from each other.

FIG. 2 is a similar view, showing the refractory bracket member engaged with the metal bracket.

FIG. 3 is a front elevational view of the metal bracket.

FIG. 4 is a vertical sectional view through the metal bracket, showing the refractory bracket member in elevation in position in the metal bracket.

FIG. 5 is a fragmentary elevational view partly broken away and partly in section of a furnace wall and nose structure made in accordance with my invention, as viewed fro-m the line 55 of FIG. 6.

FIG. 6 is a fragmentary sectional view through a portion of a furnace, taken on the line 6-6 of FIG. 5, showing my improved nose structure.

FIG. 7 is a view similar to FIG. 5 of a refractory curtain wall embodying my invention.

FIG. 8 is a fragmentary vertical sectional view partly broken away, taken on the line 88 of FIG. 7.

FIG. 9 is a perspective view of a slightly modified refractory bracket member.

FIG. 10 is a fragmentary view partly in vertical section and partly in elevation of a roof made in accordance with my invention, and

FIG. 11 is a fragmentary view partly in elevation and partly in section taken at right angles to FIG. 10.

Referring in detail to the drawings, in FIG. 6 a framework having a horizontally extending frame member is shown, which frame member has a bottom flange 21 to which a frame member 22 is attached by means of brackets 23, said frame member 20 having a plurality of metal brackets mounted on one side thereof, said metal brackets having body portions that are provided with parallel vertical side Walls 24, which are connected at their upper ends by means of a flat transverse top wall 25, from which a flange 26 extends upwardly at the rear edge thereof, said flange 26 extending perpendicularly to the flat wall portion 24 and being engaged with a flat bar 27, which is mounted in fixed position on the frame member 20 and spaced from the side wall 28 thereof by means of spacing members 29.

The side walls 24 of the metallic bracket are provided with inclined edge portions 30 adjacent their lower extremities and with short straight horizontal bottom edge portions 31, which are undercut at 32 to provide a projecting finger portion 33 that has a flat end face. Said finger portion also has a fiat bottom edge 34, the bottom edges of the side walls 24- inclining upwardly toward their forward edges as shown at 35. A transversely extending wall 36 connects the side walls 24 near the bottom thereof and extends forwardly and upwardly from the inclined edge 35, having a vertically extending portion 37 and an inclined portion 38 and terminating in a flat topped shelf portion 39, which projects forwardly from the side walls 24. The transverse wall portion 36 is preferably rovided with a stiffening fin 40 extending under the shelf portion 39. The forward edges 41 of the side walls 24 incline forwardly from the fiat top wall 25 adjacent the transverse wall 36 so as to provide side walls 24- that are of an upwardly tapering character and have a much greater width near their lower ends than at their upper ends. Said bracket members are also provided with a transverse vertical wall 42 aligning with the flange 26 and being provided with a slot-like opening 43 having its length extending transversely of the bracket.

The metal brackets are assembled with the frame members by tilting the same to insert the flange 26 back of the flat bar 27 and swinging the same downwardly so that the end 33 of the finger engages the end edge of the lower flange 21 of the frame member 20 and the straight edge portions 31 of the side walls 24 engage with the top face of said flange 21. It will be noted that the shelf portion 39 is narrower than the main body portion of the bracket, the inclined transverse wall portion 38 having tapered side edges 44. It will also be noted that the side walls, together with the bottom and upper transverse walls, form a rectangular opening in the bracket and that the shelf portion 39 extends forwardly from said rectangular opening. The side walls 24, on their inner faces, are provided with rectangular lugs 45 that are located opposite each other and are considerably nearer the top transverse wall 25 of the bracket than the bottom transverse wall portion 38. The openings 43 are provided so that if desired, fastening elements may be inserted through said openings and into the side wall 28 of the frame member 20, although this is ordinarily not necessary, as the bracket members will stay in the position shown in FIGS. 6 and 8 after being placed in such position in the manner above described.

The refractory bracket member 46 is of an elongated character, having a flat end face 47 and a face having a flat wall portion 48 parallel to the flat end face 47 and a flat inclined wall portion 49, one end of the refractory bracket member 46 being preferably cut away as shown at 49. Said refractory bracket member has a flat 10ngitudinal top face 50 and a flat longitudinal bottom face 51, which extend at right angles to the flat end face 47 and a pair of longitudinal side faces provided with marginally extending

longitudinal ribs

52 and 53 and with an intermediate longitudinally extending rib 54. The

ribs

52, 53 and 54 are of the same width at their bases and of the same height and are so spaced that the

grooves

55 and 56, that are provided between the ribs, are of approximately the same width and depth as the width and height of the

ribs

52, 53 and 54.

The

ribs

52 and 53 have wide flat inclined faces 57 extending from the flat faces 51 and 50 to the flat top faces 58 of said ribs and relatively narrow inclined faces 59 extending to the bottoms of the

grooves

55 and 56, respectively. The intermediate ribs 54 are provided with wide flat top faces 60 and narrow inclined side faces 59, which are of the same width and angularity as the side faces 59 of the

ribs

52 and 53. Accordingly the

grooves

55 and 56 are of a contour to receive a rib of approximately the shape of the intermediate rib 54. The flat top faces 58 and 60 of the ribs extend perpendicularly to the flat faces 50 and 51 of the refractory bracket member 46.

Each of the ribs 54 is provided with a recess or notch 61 located near the end of the bracket member having the inclined end face 49, said recesses each having a flat bottom face 62, a flat faced side wall 63 extending at right angles to the flat bottom face 62 and. a flat faced inclined wall 64 extending from the flat bottom face 62 and diverging toward the inclined side face 59 of said rib. This locates the recess 61 so as to open upwardly in each of the ribs 54 when the refractory bracket members 46 are assembled with the metal brackets, said recesses 61 receiv the fiat bottom wall 51 of each bracket 46 is inengagefnent with the flat shelf portion 39 of a metallic bracket and the flat top wall 50 of the refractory bracket member 46 is in engagement with the under side of the flat top transverse wall 25 of the metallic bracket. The refractory bracket member 46, when in this position, is held firmly from any tilting movement relative to the metal bracket and from any movement in and out, or l'ongitudinally of itself, with respect to said metal bracket.

The wall tiles that are associated with and suspended from the refractory bracket members 46 are all of the same general character, and are similar to the wall tiles shown and described in my co-pending application Serial No. 90,516 now Patent No. 3,132,447. All said wall tiles have a pair of marginal ribs 65 at one end thereof, which are of the same cross sectional size and shape as the intermediate ribs 54 of the refractory bracket members 46, and are adapted to fit in the

grooves

55 and 56 of said refractory bracket members (see FIGS. 5 and 7). Said ribs 65 extend continuously across a pair of opposed side faces of the wall tiles. All said wall tiles are substantially square in cross section and are elongated in a direction transverse to that of the ribs 65. Said pair of side walls are further provided with ribs that are substantial duplicates of the marginal ribs 65 and extend parallel thereto, including ribs 66, which are opposite each other on said pair of sides, but spaced from the ends of said wall tiles opposite those which have the marginal ribs 65 thereon, and ribs 67, that are between the

ribs

65 and 66. The

ribs

65, 67 and 66 are so spaced from each other that grooves 68, corresponding in shape and size to the

grooves

55 and 56 of the refractory bracket members, are provided between said ribs, said grooves extending continuously across said pair of side faces of the wall tiles and being opposite each other. The provision of the ribs 66 spaced from the fiat end faces 69 of the wall tiles provide reduced portions 70 on said wall tiles that are in alignment with the bottoms of the grooves 68. The wall tiles also have flat end faces 71 at the ends thereof at which the marginal ribs 65 are provided. The other pair of longitudinal side faces of the wall tiles are provided with ribs that are similar to the

ribs

65, 66 and 67, but may be somewhat shallower. Said ribs are primarily provided for the prevention of passage of gases between adjacent refractory members, and are all of the same general contour, but are staggered on the opposite sides of the wall tiles, said ribs being indicated by the numeral 72 in the drawings. As said ribs 72 interfit into grooves 73 in adjoining wall tiles, said interfitting ribs and grooves will aid, in holding the adjacent tiles in the desired relative position to each other.

It will be noted that the rib portions of the refractory hanger members project laterally beyond the opposite side edges of the shelf portions 39 and, except for the extremities thereof that are seated within the metal brackets, are available for engagement with wall tiles throughout the major portion of their length. Referring to FIG. 5, it will be seen that the refractory bracket members 46 are spaced apart sufficiently to receive wall tiles between them so that a row of wall tiles can be mounted on the refractory bracket member to be suspended therefrom, each of said wall tiles being engaged with a pair of adjacent refractory bracket members. Such engagement is between the marginal ribs 65 on the wall tiles 74 and the ribs 52 of the refractory bracket members 46, the ribs 52 being seated in the grooves 68'and the ribs 65 being seated in the grooves 55. In the form of the invention shown in FIGS. 5 and 6 a row of three of said refractory wall tiles 74 is mounted between each pair of refractory bracket members 46, said row extending lengthwise of the bracket member 46, or transversely of the wall. Wall tiles 75, that are duplicates of the wall tiles 74, are mounted in a row vertically below each of the refractory bracket members 46 so as to be in vertical alignment therewith. The wall tile 75 that is nearest the metallic bracket mounted end of the refractory member 46 is mounted in a slightly lower position than the other two refractory wall tiles 75, as will be evident from FIG. 6. The refractory wall tiles are mounted in an inverted position with respect to the refractory wall tiles 74, the reduced end portions 70 being upwardly, as will be obvious from FIG. 5, and the marginal flanges 65 thereon being downwardly.

Each of said wall tiles 75 is mounted between a pair of the wall tiles 74 and is suspended from said wall tiles 74, as the ribs 67 on the wall tiles 75 will be seated in grooves 68 between a rib 66 and a rib 67 of a wall tile '74, and a rib 66 of each wall tile 75 will be seated between two ribs 67 of the wall tiles 74 adjacent thereto, except for the wall tiles 75 that are in alignment with the shelf portion 39 of the metal bracket, which are displaced the distance between the pair of parallel supporting ribs on the wall tiles below the other pair of wall tiles 75, but because of the overlap of the

wall tiles

74 and 75, will still have a rib 66 thereof located between a rib 67 and a rib 66 of the adjacent wall tiles 74. Accordingly, all of the wall tiles 75 will be suspended from the wall tiles 74, the wall tiles 74 and '75 being in alignment with each other lengthwise of the wall.

Other wall tiles 74, which are the same as the wall tiles 74 and positioned in a similar manner, are in vertical alignment with the wall tiles 74 and immediately below the same, the marginal ribs 65 thereof being seated between the marginal ribs 65 at the lower ends of the wall tiles 75 and the adjacent ribs 67 on said wall tiles 75. The flat end faces 69 of the wall tiles 74' are at the bottom end of the wall shown in FIGS. 5 and 6.

Mounted between the wall tiles 74' are wall tiles 75' that are similar to the wall tiles 75 except that they are shorter, being provided with only one intermediate rib 6'7 and a marginal rib 65 and a rib 66 spaced from the fiat end 69 thereof. Said wall tiles 75 are arranged with their flat end walls 71 downwardly and in alignment with the flat end walls 69 of the wall tiles 74'. The wall tiles 75' that are in alignment with the shelf portions 39 of the metal brackets are shorter than the wall tiles 7'5 and would only have two pairs of opposed supporting ribs corresponding to the marginal ribs 6 5 and the ribs 66, so that the bottom flat faces 71 thereof would align with the other flat faces of the wall tiles 74' and 75. The wall tiles 75' are all supported between the wall tiles 74 by engagement of the ribs on the wall tiles 75 with the ribs on the wall tiles 74, in a similar manner to that described above, the ribs 66 thereon engaging between the ribs 67 of the wall tiles 74, as shown in FIG. 5, and the ribs 67 on the wall tiles 75' engaging between a rib 66 and a rib 67 of the wall tiles 74. The shorter wall tiles 75' aligning vertically with shelf portions 3?, will also have their ribs 66 positioned between a rib 66 and the rib 67 of adjacent wall tiles 74', inasmuch as they will be the distance between a pair of parallel ribs shorter than the other wall tiles 75.

Mounted by means of suitable brackets on the frame members 22 are tiles 76 that are similar to the wall tiles previously described, but are shown as being slightly longer. Said wall tiles 76 provide a furnace roof having a flat bottom wall formed by means of the fiat end faces 77 of said tiles. The flat bottom end faces 69 and 71 of the tiles 74 and 75' align with the flat end faces of the tiles '76.

As a result, a rectangular nose structure is provided in the furnace, of which a fragmentary portion is shown in FIGS. 5 and 6, which has a flat horizontal wall formed by the fiat ends of the

tiles

74, 75 and 76 and a vertical wall extending at right angles thereto formed by the heat exposed or inner faces of the

tiles

74, 74, '75 and 75'.

In order to complete the vertical wall of the nose structure between a refractory wall indicated generally at 78 and the

tiles

74, 74', 75 and 75 suspended from the refractory bracket members 46, refractory wall tiles '79 are mounted between the refractory bracket members 46 having the ribs 66 thereof mounted in the grooves 56 of the refractory bracket members 46. Mounted between the wall tiles 79 and supported on the top flat faces 50 of the refractory bracket members 46 are wall tiles 80, which are shorter than the wall tiles 74, and still shorter wall tiles 81, all of which are provided with a rib structure of the same character as that of the tiles 74, said tiles having their reduced end portions 70 mounted on the flat walls 50 and having ribs, such as the rib 66, seated between a pair of ribs of the wall tiles 79. The wall 78 may be of any suitable character and mounted in any suitable manner on the framework.

'It will be noted that all the wall tiles of the nose structure that are exposed to the direct heat of the furnace do not have any portions thereof exposed to the cooler outer air, the heat exposed portion of the nose structure being made up entirely of the

wall tiles

75, 74 and the

wall tiles

74, 75, 79 and 80 that are in alignment with the flat end walls 47 of the refractory bracket members 46.

In FIGS. 7 and 8, my improved wall structure utilizing the metal brackets and the refractory bracket members hereinbefore described, is shown as being applied to a refractory curtain wall. The refractory bracket members 46 are associated with the metal bracket members in the same manner as previously described in connection with FIGS. and 6 and have a row of wall tiles mounted on the refractory members to be suspended therefrom in the same manner as previously described, the same reference numerals being applied thereto as in FIGS. 5 and 6. The refractory wall tiles 74 have the marginal ribs 65 thereof engaged with the grooves 55 of the refractory bracket members 46 and the refractory wall tiles 75, which are duplicates of the Wall tiles 74, are mounted vertically below the refractory bracket members 46 and engage with the wall tiles 74 in the same manner as in FIGS. 5 and 6, having the ribs 66 thereof engaged in the grooves 68 of the wall tiles 74. The wall tiles 75 are mounted in an inverted position with respect to the wall tiles 74 and are engaged by the wall tiles 74' by engagement of the marginal ribs 65 on the wall tiles 75 with the grooves 68 of the wall tiles 74'. Thus the wall tiles 74' are suspended from the wall tiles 75. The wall tiles 75' are similarly suspended from the wall tiles 74', as will be obvious from FIG. 7. As in the form of the invention shown in FIGS. 5 and 6, the wall tiles 75 that are in vertical alignment with the shelf portions 39 are displaced the same distance downwardly as the corresponding wall tiles in the form of the invention shown in FIGS. 5 and 6.

A plurality of vertically spaced horizontal rows of ribbed wall tiles made up of the

wall tiles

74 and 75 arranged in the overlapping relationship shown in FIG. 7,

extend downwardly from the

wall tiles

74 and 75, the

wall tiles of the adjacent rows overlapping and interengaging as shown in FIG. 7. In order to provide a flat bottom face for the curtain wall, the wall tiles 75' in the lowermost rows of wall tiles are shorter than the other wall tiles 75, as will be clear from FIG. 7, the same being suspended from wall tiles 74', which are of the same length as the wall tiles 74. This arrangement of shorter wall tiles 75 is the same as at the bottom end of the vertical wall portion of the nose structure shown in FIGS. 5 and 6.

Wall tiles

79, 80 and 81 are mounted with relation to the bracket members 46 in the form of the invention shown in FIGS. 7 and 8 in the same manner as in the form of the invention shown in FIGS. 5

and 6 in order to complete the vertical wall between 74 and 75, the same being mounted in a similar manner to the wall tiles 76 shown in FIG. 6 on frame members 22' mounted on the frame members 20 in a similar manner to that described in connection with the frame members 22.

The curtain wall shown in FIGS. 7 and 8 has its hot side toward the horizontal top wall made up of the refractory wall tile members 82, the right hand side of the wall shown in FIG. 8 being the cool side. It will be noted upon reference to FIG. 8 that there are two rows of refractory wall tile members between the refractory wall tile members that are on the cool face of the wall and the hot face thereof. The same is true of the refractory wall tile members 74', as the refractory

wall tile members

74 and 75 are in alignment with each other lengthwise of the wall, as is also true of the refractory wall tile members 74' and 75'. Accordingly there is no refractory wall tile in the curtain wall that is exposed to the direct heat of the furnace, that is also exposed to the cooler air outside the furnace.

Referring now to FIG. 9, an elongated refractory bracket member, similar to that shown in FIGS. 1, 2 and 4 is shown therein, which has a substantially rectangular body portion, said bracket member having flat end faces and a pair of flat longitudinal side faces 91 that extend at right angles to the end faces 90 and either one of which can be the bottom face of the bracket. Said refractory bracket members have longitudinal side faces that are provided with marginal longitudinally extending

ribs

92 and 93, which project from the main rectangular body portion of the bracket member. Also projecting from the walls that are provided with the

marginal ribs

92 and 93 are the intermediate ribs 94. The ribs 94 and the

ribs

92 and 93 are of the same cross sectional size and are so spaced that

grooves

95 and 96 are provided between the ribs 94 and the

ribs

92 and 93, said grooves being of approximately the same depth and width as the width and height of the

ribs

92, 93 and 94. Said grooves have flat bottom walls 97 and the

ribs

92, 93 and 94 have flat top or outer walls 98, which walls 98 are of substantially the width of the bottom walls 97 of the grooves. The

ribs

92 and 93 have rounded corners, as shown at 99, and the ribs 94 have side walls 100 that H diverge slightly toward the bottom walls 97 of the

grooves

95 and 96, the

ribs

92 and 93 having inclined walls 101 that are inclined similarly to the side walls 100 of the ribs 94. Thus the

grooves

95 and 96 gradually widen outwardly toward the entrances into the same, the

walls

100, 101 inclining only sufficiently to facilitate the moulding of the refractory bracket members, being at an angle only slightly greater than a right angle to the top walls 98.

The refractory bracket members are mounted on any suitable framework, which is shown in FIGS. 10 and 11 as comprising frame members 102, upon which metal bracket members 103 are mounted. The bracket members 103 have a pair of depending ears 104 thereon that terminate in inturned ends 105 that extend at an oblique angle to the downwardly extending portion 104 and are adapted to engage the

marginal ribs

92 or 93 of the refractory bracket members, which bracket members are indicated generally by the numeral 106 in FIGS. 10 and 11. While the marginal ribs of the refractory bracket members are designated by the numerals 92 and 93-, said marginal ribs are duplicates, and it is understood that the bracket member 106 can be utilized with either the marginal ribs 92 or the marginal ribs 93 upwardly and in engagement with the metallic brackets 103, it being only necessary that the metallic bracket members carried by the framework are engaged with upper marginal ribs of the refractory bracket members 106 in order that these will serve their purpose of supporting a roof or arch structure from the metallic framework.

With the refractory bracket members 106 in the position shown in FIGS. and 11, the wall tiles are ready to be assembled therewith. The wall tiles that are used in building the refractory arch or roof shown in FIGS. 10 and 11 are of the same general character as the Wall tiles previously described. Said wall tiles are shown in FIGS. 10 and 11 as comprising longer wall tiles 107 and shorter wall tiles 108. The

wall tiles

107 and 108 are of a similar character, being only different in length. Said wall tiles 107 have substantially fiat end walls 109 and are provided with marginal ribs 110 at one end thereof, which are of the same cross sectional size and shape as the

marginal ribs

92 and 93 of the refractory bracket members 106. Said wall tiles are also provided with a plurality of ribs 111, 112 and 113, that are all of the same cross sectional size and shape, the cross sectional size and shape thereof being the same as the ribs 94 of the bracket member 106. The end walls of the wall tiles 107 opposite those that have the marginal ribs 110 thereon are spaced from the ribs 113 so as to provide a reduced end portion 114 thereon. The ribs 111, 112 and 113 are spaced from each other and from the marginal rib 110 such distances that the width and depth of the grooves formed between them, indicated by the numerals 115, 116 and 117, are substantially the same as the width and height of the ribs 111, 112 and 113, and the bottom Walls of the grooves 115, 116 and 117 are of approximately the same width as the faces of the ribs 111, 112 and 113, with the entrances to said grooves of approximately the same width as the base portions of the ribs 111, 112 and 113.

The end ribs or flanges 110 are seated in the grooves 96 of the refractory bracket members 106, the wall tiles thus being supported by and suspended from the refractory bracket members 106, because of the engagement of the marginal ribs 110 with the marginal ribs 513 of the refractory brackets 106, said ribs 93 being seated in the grooves 115 of the Wall tiles 107.

The faces of the wall tiles 107 that are at right angles to the faces thereof that have the alternating ribs and grooves are provided with alternating depressions 118 and raised portions 119 providing shallow ribs and grooves, which are for the purpose of reducing the passage of hot gases between adjoining wall tiles, but which have no supporting function, while the

ribs

110, 111, 112 and 113, and the grooves 115, 116 and 117 serve not only as means for supporting one wall tile on another, and supporting the wall tiles 107 on the refractory brackets 106, but also serve to provide such a circuitous path for the hot gases. While the ribs 110, 111, 112 and 11.3 on each of said tiles 107 are opposite the

ribs

110, 111, 112 and 113 on the opposite side thereof, the shallow ribs 119 on one side of the tiles 107 are opposite the shallow grooves 118 on the opposite side thereof.

The wall tiles 108 are provided with marginal ribs 120 at one end thereof, which are of the same cross sectional size and shape as the

marginal ribs

92 and 93 of the bracket members 106 and marginal ribs 110 of the wall tiles 107. Said wall tiles 108 are also provided with

ribs

121 and 122 that are both of the same cross sectional size and shape, which is the same as that of the ribs 94 of the refractory hanger members 106 and of the ribs 111, 112 and 113. The wall tiles 108 have fiat end walls 123 and the ribs 122 are spaced from one end of the wall tiles 108 so as to provide reduced portions 124 corresponding to the reduced portions 114 of the tiles 107. The ribs 121 'and 122 are spaced from each other and from the marginal ribs 120 so that the width and depth of the

grooves

125 and 126 is substantially the same as the width and height of the

ribs

121 and 122 and thus of the ribs 111, 112 and 113, and the bottom walls of the

grooves

125 and 126 are approximately the same width as the outer faces of the

ribs

111, 112 and 113, 121 and 122.

The faces of the wall tiles 108 that are at right angles to those that have the alternating ribs and grooves 120,

10 121, 122, 125 and 126 thereon, are provided with alternating depressions 118 and raised portions 119, just as are the wall tiles 107, the raised portions 119 of the tiles 108 being adapted to engage the depressed portions 118 of the

tiles

107 and 108 adjacent which the same are located.

Upon reference to FIG. 10, it will be noted that there is a tile 107 located on each side of a refractory bracket member 106 and suspended therefrom by engagement of the marginal ribs with the marginal ribs 92 on the refractory bracket members. Upon reference to FIG. 11, it will be noted that a row of said tiles 107 is mounted on each side of the refractory bracket member 106, the tiles 107 being shown as overlapping the joints of the hanger members 106 in FIG. 11. A wall tile 108 is mounted between each pair of the wall tiles 107, there being thus a row of the wall tiles 108 between the inner or heat exposed face of the wall and each refractory bracket member 106, as will be obvious from FIG. 11. Said wall tiles 108 are mounted between the tiles 107 with the marginal ribs seated against the reduced portions 114 of the adjacent wall tiles 107 and with the

ribs

121 and 122, respectively, thereof, seated in the grooves 117 and 116, respectively, of the wall tiles 107 on each side thereof. The ribs 111 of the wall tiles 107 lie adjacent the reduced end portions 124 of the wall tiles 108, while the ribs 112 and 113 of the wall tiles 107 are seated in the grooves 126 and of said wall tiles 108. The wall tiles 108 are thus suspended from the walll tiles 107 and have their inner ends 123 aligned with the inner ends 109 of the wall tiles 107, with a row of said wall tiles 108 lying between two rows of wall tiles 107 and being in vertical alignment with a refractory bracket member 106.

In the structure shown in FIGS. 10 and 1 1 an intermediate row of wall tiles 107 is also suspended. from the wall tiles 107 that are hung from the bracket members 106, thus providing a row of wall tiles that are out of alignment with the refractory bracket members 106, which permits the spacing of the metal framework members 102, brackets 103 and refractory bracket members 106 further apart transversely than would otherwise be possible. It will be obvious that when the intermediate wall tiles 107 are put in position they are arranged with their marginally ribbed ends downwardly instead of upwardly, so that the ribs 110 of the intermediate row of wall tiles 107 will lie opposite the reduced ends 114 of the adjacent wall tiles 107 that are hung from the bracket members 106, and ribs 113, 112 and 111 of said intermediate wall tiles 107 will be seated in the grooves 115, 116 and 117, respectively. of the wall tiles 107 that support the same from the refractory bracket 106, while the ribs 110 on the wall tiles that are hung from the brackets 106 will lie opposite the reduced upper end portions 114 of the intermediate wall tiles 107 and the ribs 111, 112 and113 of the hanger suspended wall tiles 107 will be seated in the grooves 117, 116 and 115, respectively, of the intermediate wall tiles 107. Thus the intermediate rows of wall tiles 107 will be interlocked with the rows of wall tiles 107 that are suspended from the refractory bracket members 106, as will also be the wall tiles 108.

What I claim is:

1. The combination with a metallic framework of metallic brackets mounted on said framework, each of said metallic brackets having wall portions defining a rectangular opening therein and a projecting shelf portion, elongated refractory bracket members mounted on said shelf portions and having end portions mounted in said rectangular opening, to support said refractory brackets to extend horizontally from said metallic brackets, each of said refractory bracket members having a pair of marginal ribs thereon extending longitudinally of each of a pair of longitudinal side faces thereof and an intermediate rib on each of said side faces equidistantly spaced from said marginal ribs and extending parallel thereto to provide a pair of parallel longitudinal grooves in each of said side faces, a flat bottom face engaging said shelf portion and a flat top face parallel thereto, and wall tiles mounted on said refractory bracket members to depend therefrom, said wall tiles having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces of each thereof, the ribs on one of the side faces of said pair being opposite the ribs on the other side face of said pair, said ribs on said wall tiles including marginal ribs each seated in a groove between a marginal rib on a refractory bracket member and an intermediate rib on said refractory bracket member to suspend said wall tiles from said refractory bracket members.

2. The combination with a metallic framework of metallic brackets mounted on said framework, each of said metallic brackets having wall portions defining a rectangular opening therein and a projecting shelf portion, elongated refractory bracket members mounted on said shelf portions and having end portions mounted in said rectangular opening, to support said refractory bracket members to extend horizontally from said metallic brackets, each of said refractory bracket members having a pair of marginal ribs thereon extending longitudinally of each of a pair of longitudinal side faces thereof and an intermediate rib on each of said side faces equidistantly spaced from said marginal ribs and extending parallel thereto to provide .a pair of parallel longitudinal grooves in each of said side faces, a flat bottom face engaging said shelf portion and a flat top face parallel thereto, wall tiles mounted on said refractory bracket members to depend therefrom, said wall tiles having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces of each thereof, the ribs on one of the side faces of said pair being opposite the ribs on the other side face of said pair, said ribs on said wall tiles including marginal ribs each seated in a groove between a marginal rib on a refractory bracket member and an intermediate rib on said refractory bracket member to suspend said wall tiles from said refractory bracket members, and wall tiles suspended from said first mentioned wall tiles, said last mentioned wall tiles having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces of each thereof, the ribs on one of the side faces of said pair being opposite the ribs on the other side face of said pair, said ribs on said last mentioned wall tiles including marginal ribs each seated in a groove between a pair of said ribs on said first mentioned wall tiles.

3. The combination with a metallic framework of metallic brackets mounted on said framework, each of said metallic brackets having a pair of parallel transversely spaced side walls, a flat top wall extending between said side walls and a transverse wall connecting said side walls adjacent the lower ends thereof and having a forwardly projecting flat shelf portion, elongated refractory bracket members having end portions engaging said metallic brackets and extending horizontally therefrom, each of said refractory bracket members having a pair of marginal ribs thereon extending longitudinally of each of a pair of longitudinal side faces thereof and an intermediate rib on each of said side faces equidistantly spaced from said marginal ribs and extending parallel thereto to provide a pair of parallel longitudinal grooves in each of said side faces, a flat bottom face engaging said shelf portion and a flat top face parallel thereto engaging said top wall of said metallic bracket member to support said refractory bracket member on said metallic bracket, and wall tiles mounted on said refractory bracket members to depend therefrom, said wall tiles having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces of each thereof, the ribs on one of the side faces of said pair being opposite the ribs on the other side face of said pair, said ribs on said wall tiles including marginal ribs each seated in a groove between a marginal rib on a refractory bracket member and an intermediate rib on said refractory bracket member to suspend said wall tiles from said" refractory bracket members.

4. The combination with a metallic framework of metallic brackets mounted on said framework, each of said metallic brackets having a pair of parallel transversely spaced side walls, lugs projecting inwardly from said side walls, a fiat top wall extending between said side walls and a transverse wall connecting said side walls adjacent the lower ends thereof and having a forwardly projecting fiat shelf portion, elongated refractoly bracket members having end portions engaging said metallic brackets and extending horizontally therefrom, each of said refractory bracket members having a pair of marginal ribs thereon extending longitudinally of each of a pair of longitudinal side faces thereof and an intermediate rib on each of said side faces equidistantly spaced from said marginal ribs and extending parallel thereto to provide a pair of parallel longitudinal grooves in each of said side faces, a flat bottom face engaging said shelf portion and a flat top face parallel thereto engaging said top Wall of said metallic bracket member to support said refractory bracket member on said metallic bracket, said intermediate ribs being recessed to receive said lugs, and wall tiles mounted on said refractory bracket members to depend therefrom, said wall tiles having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces of each thereof, the ribs on one of the side faces of said pair being opposite the ribs on the other side face of said pair, said ribs on said wall tiles including marginal ribs each seated in a groove between a marginal rib on a refractory bracket member and an intermediate rib on said refractory bracket member to suspend said wall tiles from said refractory bracket members.

5. A refractory bracket member having an elongated rectangular body portion having continuous marginal longitudinal ribs on a pair of opposed longitudinal side faces thereof and having flat top and bottom faces, and an intermediate longitudinal rib extending continuously along each of said side faces in parallelism to said marginal ribs in equidistantly spaced relation thereto to define a pair of parallel longitudinally extending grooves in each side face of said pair, said ribs on one of said side faces being opposite the ribs on said other side face, said intermediate ribs each having a recess therein on one side thereof adjacent one end thereof, said recesses being opposite each other.

6. The combination with a metallic framework of a horizontal row of metallic brackets mounted on said framework, each of said metallic brackets having a pair of parallel transversely spaced side walls, a flat top wall extending between said side walls and a transverse wall connecting said side walls adjacent the lower ends thereof and having a forwardly projecting flat shelf portion, elongated refractory bracket members extending horizontally from said metallic brackets, said refractory bracket members having flat top and bottom faces engaging said fiat top walls and said shelf portions respectively, to support said refractory bracket members on said metallic brackets, and side faces each having upper and lower marginal ribs and an intermediate rib extending lengthwise thereof, said intermediate ribs being opposite each other and spaced from said marginal ribs to define longitudinal grooves alternating with said ribs, vertically elongated wall tiles each mounted between a pair of said refractory bracket members, said wall tiles having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces of each thereof, the ribs on one of the side faces of said pair being opposite the ribs on the other side face of said pair, said ribs on said wall tiles including marginal ribs seated in the grooves between the lower marginal ribs and the intermediate ribs on said refractory bracket members to suspend said wall tiles from said refractory bracket members, said wall tiles having said ribbed portions extending downwardly beyond said refractory bracket members, and wall tiles vertically aligning with said bracket members and suspended from said first mentioned wall tiles, said last mentioned wall tiles having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces of each thereof, the ribs on one of the side walls of said pair being opposite the ribs on the other side face of said pair, said ribs on said last mentioned wall tiles including marginal ribs each seated in a groove between a pair of ribs on the downwardly extending portions of one of said first mentioned Wall tiles.

7. The combination with a metallic framework of a horizontal row of metallic brackets mounted on said framework, each of said metallic brackets having a pair of parallel transversely spaced side Walls, a flat top wall extending between said side walls and a transverse wall connecting said side walls adjacent the lower ends thereof and having a forwardly projecting flat shelf portion, elongated refractory bracket members extending horizontally from said metallic brackets, said refractory bracket members having a flat top and bottom faces engaging said flat top walls and said shelf portions re spectively, to support said refractory bracket members on said metallic brackets, and side faces each having upper and lower marginal ribs and an intermediate rib extending lengthwise thereof, said intermediate ribs being opposite each other and spaced from said marginal ribs to define longitudinal grooves alternating with said ribs, vertically elongated wall tiles each mounted between a pair of said refractory bracket members, said wall tiles having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces of each thereof, the ribs on one of the side faces of said pair being opposite the ribs on the other side face of said pair, said ribs on said wall tiles including marginal ribs seated on the groves between the lower marginal ribs and the intermediate ribs on said refractory bracket members to suspend said wall tiles from said refractory bracket members, said wall tiles having said ribbed portions extending downwardly beyond said refractory bracket members, wall tiles vertically aligning with said bracket members and suspended from said first mentioned Wall tiles, said last mentioned wall tiles having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces of each thereof, the ribs on one of the side faces of said pair being opposite the ribs on the other side face of said pair, said ribs on said last mentioned wall tiles including marginal ribs each seated in a groove between a pair of ribs on the downwardly extending portion of one of said first mentioned wall tiles, wall tiles mounted on and extending upwardly from said refractory bracket members and wall tiles mounted between said refractory bracket members having ribs thereon seated in the grooves between the intermediate and upper marginal ribs of said refractory bracket members.

8. In a furnace structure, a metallic framework, a horizontal row of metallic brackets mounted on said framework, each of said metallic brackets having a pair of transversely spaced side walls, a flat top wall extending between said side walls and a transverse wall connecting said side walls adjacent the lower ends thereof and having a forwardly projecting flat shelf portion, elongated refractory bracket members extending horizontally from said brackets, said refractory bracket members having flat top and bottom faces engaging said flat top walls and shelf portions respectively, to support said refractory bracket members on said metallic brackets, and having side faces each having upper and lower marginal ribs and an intermediate rib extending lengthwise thereof, said intermediate ribs being opposite each other and spaced from said marginal ribs to define longitudinal grooves alternating with said ribs, vertically elongated wall tiles each having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces thereof, the ribs on one of the side faces of said pair being opposite the ribs on the other side face of said pair, each of said wall tiles having flat end faces, longitudinal rows of said wall tiles being mounted between pairs of said refractory bracket members, said ribs on said wall tiles including marginal ribs seated in the grooves between the lower marginal ribs and the intermediate ribs on. said refractory bracket members to suspend said wall tiles from said refractory bracket members, said wall tiles having said ribbed portions extending downwardly beyond said refractory bracket members, longitudinal rows of wall tiles vertically aligning with said bracket members and suspended from said first mentioned wall tiles, said last mentioned wall tiles having ribbed portions extending downwardly beyond the lower ends of said first mentioned wall tiles, and bottom alternating rows of longer and shorter suspended ribbed wall tiles, said shorter bottom row wall tiles being vertically below said refractory bracket members and of such length as to horizontally align the bottom fiat ends of all said bottom rows of tiles with each other to form a rectangular nose portion, and a refractory roof extending horizontally from said wall tiles having a flat bottom face aligning with said bottom flat ends of said bottom row tiles.

9. In a furnace structure, a metallic framework, a horizontal row of metallic brackets mounted on said framework, each of said metallic brackets having a pair of transversely spaced side walls, a fiat top wall extending between said side walls and a transverse wall connecting said side walls adjacent the lower ends thereof and having a forwardly projecting flat shelf portion, elongated refractory bracket members extending horizontally from said brackets, said refractory bracket members having flat top and bottom faces engaging said flat top walls and said shelf portions respectively, to support said refractory bracket members on said metallic brackets, and having side faces each having upper and lower marginal ribs and an intermediate rib extending lengthwise thereof, said intermediate ribs being opposite each other and spaced from said marginal ribs to define longitudinal grooves alternating with said ribs, and a refractory curtain wall mounted on said refractory bracket members, said curtain wall comprising vertically elongated wall tiles each having a plurality of parallel alternating ribs and grooves extending continuously across a pair of opposed side faces thereof, the ribs on one of the side faces of said pair being opposite the ribs on the other side face of said pair, each of said wall tiles having fiat end faces, longitudinal rows of said Wall tiles being mounted between .pairs of said refractory bracket members, said ribs on said wall tiles including marginal ribs seated in the grooves between the lower marginal ribs and the intermediate ribs on said refractory bracket members to suspend said wall tiles from said refractory bracket members, said wall tiles having said ribbed portions extending downwardly beyond said refractory bracket members, longitudinal rows of wall tiles vertically aligning with said bracket members and suspended from said first mentioned wall tiles, said last mentioned wall tiles having ribbed portions extending downwardly beyond the lower ends of said first mentioned wall tiles, and a plurality of vertically spaced horizontal rows of ribbed wall tiles extending downwardly from each of said aforementioned rows of wall tiles, the wall tiles of horizontally adjacent rows overlapping and interengaging and including bottom alternating rows of longer and shorter suspended ribbed wall tiles, said shorter bottom row wall tiles being vertically below said refractory bracket members and of such length as to horizontally align the bottom fiat ends of all said bottom rows of tiles with each other.

10. A refractory bracket member having an elongated rectangular body portion having continuous marginal longitudinal ribs on a pair of opposed longitudinal side faces 15 thereof and having flat top and bottom faces, and an intermediate longitudinal rib extending continuously along each of said side faces in parallelism to said marginal ribs in equidistantly spaced relation thereto to define a pair of parallel longitudinally extending grooves in each side face of said pair, said ribs on one of said side faces being opposite the ribs on said other side face, said intermediate ribs each having a recess therein on one side thereof adjacent one end thereof, said recesses each having a fiat bottom Wall, a wall perpendicular to said bottorn wall at the end thereof adjacent said one end of said rib and an upwardly outwardly inclined wall at the other end of said recess, said recesses being opposite each other.

References Cited by the Examiner UNITED STATES PATENTS 1,443,487 1/1923 Liptak 110 99 1,463,045 7/1923 Liptak 52 479 1,705,965 3/1929 De Wolf 110-99 1 6 Ferguson 52483 Doyle et al 52608 X Beecher 52487 Antill 52569 X Young 52487 X Christofiersen 52702 X Weber 110-99 Longenecker 1l0-99 X Hosbein 52486 X FOREIGN PATENTS France.

Great Britain. Great Britain. Great Britain. Great Britain.

RICHARD W. COOKE, JR., Primary Examiner.

JACOB L. NACKENOFF, Examiner.

Claims

1. THE COMBINATION WITH A METALLIC FRAMEWORK OF METALLIC BRACKETS MOUNTED ON SAID FAMEWORK, EACH OF SAID METALLIC BRACKETS HAVING WALL PORTIONS DEFINING A RECTANGULAR OPENING THEREIN AND A PROJECTING SHELF PORTION, ELONGATED REFRACTORY BRACKET MEMBERS MOUNTED ON SAID SHELF PORTIONS AND HAVING END PORTIONS MOUNTED IN SAID RECTANGULAR OPENING, TO SUPPORT SAID REFRACTORY BRACKETS TO EXTEND HORIZONTALLY FROM SAID METALLIC BRACKETS, EACH OF SAID REFRACTORY BRACKET MEMBERS HAVING A PAIR OF MARGINAL RIBS THEREON EXTENDING LNGITUDINALLY OF EACH OF A PAIR OF LONGITUDINAL SIDE FACES THEREOF AND AN INTERMEDIATE RIB ON EACH OF SAID SIDE FACES EQUIDISTANTLY SPACED FROM SAID MARGINAL RIBS AND EXTENDING PARALLEL THERETO TO PROVIDE A PAIR OF PARALLEL LONGITUDINAL GROOVES IN EACH OF SAID SIDE FACES, A FLAT BOTTOM FACE ENGAGING SAID SHELF PORTION AND A FLAT TOP FACE PARALLEL THERETO, AND WALL TILES MOUNTED ON SAID REFRACTORY BRACKET MEMBERS TO DEPEND THEREFROM, SAID WALL TILES HAVING PLURALITY OF PARALLEL ALTERNATING RIBS AND GROOVES EXTENDING CONTINUOUSLY ACROSS A PAIR OF OPPOSED SIDE FACES OF EACH THEREOF, THE RIBS ON ONE OF THE SIDE FACES OF SAID PAIR BEING OPPOSITE THE RIBS ON THE OTHER SIDE FACE OF SAID PAIR, SAID RIBS ON SAID WALL TILES INCLUDING MARGINAL RIBS EACH SEATED IN A GROOVE BETWEEN A MARGINAL RIB ON A REFRACTORY BRACKET MEMBER AND AN INTERMEDIATE RIB ON SAID REFRACTORY BRACKET MEMBER TO SUSPEND SAID WALL TILES FROM SAID REFRACTORY BRACKET MEMBERS.