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Chemical Resistant Brick: 9" Series Units Required for Brick Circles

9 x 4-1/2 x 2-1/4 INCH ARCH BRICK (Available in Fire Clay Only)
Inside Diameter No. 3 Arch No. 2 Arch No. 1 Arch Straight Total Inside Diameter No. 3 Arch No. 2 Arch No. 1 Arch Straight Total

0'6" 19 - - - 19 7'0" - - 76 41 117
1'0" 12 15 - - 27 7'6" - - 76 49 125
1'6" 4 30 - - 34 8'0" - - 76 56 132
1'9" - 38 - - 38 8'6" - - 76 64 140
2'0" - 34 8 - 42 9'0" - - 76 71 147
2'6" - 26 23 - 49 9'6" - - 76 79 155
3'0" - 19 38 - 57 10'0" - - 76 87 163
3'6" - 11 53 - 64 10'6" - - 76 94 170
4'0" - 4 68 - 72 11'0" - - 76 102 178
4'3" - - 76 - 76 11'6" - - 76 109 185
4'6" - - 76 4 80 12'0" - - 76 117 193
5'0" - - 76 11 87 12'6" - - 76 124 200
5'6" - - 76 19 95 13'0" - - 76 132 208
6'0" - - 76 26 102 13'6" - - 76 139 215
6'6" - - 76 34 110 14'0" - - 76 147 223
6'0" - - 76 26 102 14'6" - - 76 154 230

9 x 4-1/2" x 2-1/4 INCH WEDGE BRICK
Inside Diameter No. 2 Wedge No. 1 Wedge Straight Total Inside Diameter No. 2 Wedge No. 1 Wedge Straight Total

2'3" 57 - - 57 14'0" - 91 143 234
2'6" 51 10 - 61 14'6" - 91 151 242
3'0" 38 30 - 68 15'0" - 91 158 249
3'6" 25 51 - 76 15'6" - 91 166 257
4'0" 13 70 - 83 16'0" - 91 173 264
4'6" - 91 - 91 16'6" - 91 181 272
5'0" - 91 7 98 17'0" - 91 188 279
5'6" - 91 15 106 17'6" - 91 196 287
6'0" - 91 22 113 18'0" - 91 203 294
6'6" - 91 30 121 18'6" - 91 211 302
7'0" - 91 38 129 19'0" - 91 219 310
7'6" - 91 45 136 19'6" - 91 226 317
8'0" - 91 53 144 20'0" - 91 234 325
8'6" - 91 60 151 20'6" - 91 241 332
9'0" - 91 68 159 21'0" - 91 249 340
9'6" - 91 75 166 21'6" - 91 256 347
10'0" - 91 83 174 22'0" - 91 264 355
10'6" - 91 90 181 22'6" - 91 271 362
11'0" - 91 98 189 23'0" - 91 279 370
11'6" - 91 105 196 23'6" - 91 286 377
12'0" - 91 113 204 24'0" - 91 294 385
12'6" - 91 121 212 24'6" - 91 301 392
13'0" - 91 128 219 25'0" - 91 309 400
13'6" - 91 136 227 25'6" - 91 317 408
          26'0" - 91 324 415
          26'6" - 91 332 423
          27'0" - 91 339 430
          27'6" - 91 347 438

9 x 4-1/2 x 2-1/4 INCH KEY BRICK
Inside Diameter No. 4 Key No. 3 Key No. 2 Key No. 1 Key Straight Total Inside Diameter No. 4 Key No. 3 Key No. 2 Key No. 1 Key Straight Total
1'6" 26 - - - - 26 12'6" - - - 113 5 118
2'0" 17 13 - - - 30 13'0" - - - 113 9 122
2'6" 9 25 - - - 34 13'6" - - - 113 13 126
3'0" - 38 - - - 38 14'0" - - - 113 17 130
3'6" - 29 13 - - 42 14'6" - - - 113 21 134
4'0" - 21 25 - - 46 15'0" - - - 113 26 139
4'6" - 13 38 - - 51 15'6" - - - 113 30 143
5'0" - 4 51 - - 55 16'0" - - - 113 34 147
5'3" - - 57 - - 57 16'6" - - - 113 38 151
5'6" - - 55 4 - 59 17'0" - - - 113 42 155
6'0" - - 50 13 - 63 17'6" - - - 113 47 160
6'6" - - 46 21 - 67 18'0" - - - 113 51 164
7'0" - - 42 30 - 72 18'6" - - - 113 55 168
7'6" - - 38 38 - 76 19'0" - - - 113 59 172
8'0" - - 34 46 - 80 19'6" - - - 113 63 176
8'6" - - 29 55 - 84 20'0" - - - 113 68 181
9'0" - - 25 63 - 88 20'6" - - - 113 72 185
9'6" - - 21 72 - 93 21'0" - - - 113 76 189
10'0" - - 17 80 - 97 21'6" - - - 113 80 193
10'6" - - 13 88 - 101 22'0" - - - 113 84 197
11'0" - - 9 96 - 105 22'6" - - - 113 88 201
11'6" - - 4 105 - 109 23'0" - - - 113 93 206
12'0" - - - 113 - 113 23'6" - - - 113 97 210
              24'0" - - - 113 101 214
              24'6" - - - 113 105 218