## Tables

The following tables will prove useful in figuring the quantity of material required to cover a given number of square feet.

## Flat-Seam Roofing

Table showing quantity of 14 x 20-inch tin required to cover a given number of square feet with flat-seam tin roofing. A sheet of 14 x 20 inches with 1/2-inch edges measures, when edged or folded, 13 x 19 inches or 242 square inches. In the following all fractional parts of a sheet are counted as full sheet.

 No. of sq. ft. Sheets required 100 59 110 65 120 70 130 76 140 82 150 88 160 94 170 100 180 105 190 111 200 117 210 123 220 129 230 135 240 140 250 146 260 152 270 158 280 164 290 170 300 175 310 181 320 187
 No. of sq. ft. Sheets required 330 193 340 199 350 205 360 210 370 216 380 222 390 228 400 234 410 240 420 245 430 251 440 257 450 263 460 269 470 275 480 280 490 286 500 292 510 298 520 304 530 309 540 315 550 321
 No. of sq. ft. Sheets required 560 327 570 333 580 339 590 344 600 350 610 356 620 362 630 368 640 374 650 379 660 385 670 391 680 397 690 403 700 409 710 414 720 420 730 426 740 432 750 438 760 444 770 449
 No. of sq. ft. Sheets required 780 455 790 461 800 467 810 473 820 479 830 484 840 490 850 496 860 502 870 508 880 514 890 519 900 525 910 531 920 537 930 543 940 549 950 554 960 560 970 566 980 572 990 578

1000 square feet, 583 sheets

A box of 112 sheets 14 x 20 inches will cover approximately 192 square feet.

Example. How much 14 x 20 inch tin with 1/2-inch edges is required to cover a roof of 20 feet x 84 feet? Take 20 x 84 = 1,680 square feet.

Referring to the table for Flat Seam Roofing, 1000 square feet require

583 sheets and 680 square feet require 397 sheets, making a total of

980 sheets.

It should be understood that this amount is figured on the basis of 247 square inches in an edged sheet, which will be a trifle less when the sheets are laid on the roof.

Example. What quantity of 20 x 28-inch tin will be required to lay a standing seam roof, measuring 37 feet long x 45 feet in width?

Take 37 x 45 = 1,665 square feet, or 16 squares and 65 feet. Referring to the table for Standing Seam Roofing, 16 squares require 4 boxes and 48 sheets, and 65 feet require 20 sheets, making a total of 4 boxes and 68 sheets.

## Standing-Seam Roofing

 Table showing the quantity of 20 X 28-inch tin in boxes, and sheets required to lay any given standing-seam roof. SQ. FEET SHEETS SQUARES SQ. FEET liOXES SHEETS SQUARES BOXES SHEETS 1 1 .. 68 . 21 35 9 77 2 1 .. 69 . 21 36 9 108 3 1 .. 70 . 22 37 10 27 4 2 .. 71 . 22 38 10 58 5 2 .. 72 . 22 39 10 89 6 2 .. 73 . 22 40 11 8 7 3 .. 74 . 23 41 11 39 8 3 .. 75 . 23 42 11 70 9 3 .. 76 . 23 43 11 101 10 4 .. 77 . 24 44 12 20 11 4 .. 78 . 24 45 12 51 12 4 .. 79 . 2J 46 12 82 13 4 .. 80 . 25 47 13 1 14 5 .. 81 . 25 48 13 32 15 5 .. 82 . 25 49 13 63 16 5 .. 83 . 25 50 13 94 17 6 .. 84 . 26 51 14 13 18 6 .. 85 . 26 52 14 44 19 6 .. 86 . 26 53 14 75 20 7 .. 87 . 27 54 14 106 21 7 .. 88 . 27 55 15 25 22 7 .. 89 . 27 56 15 56 23 7 .. 90 . 28 57 15 87 24 8 .. 91 . 28 58 16 6 25 8 .. 92 . 28 59 16 37 26 8 .. 93 . 28 60 16 68 27 9 .. 91 . 29 61 16 99 28 9 .. 95 . 29 62 17 18 29 9 .. 96 . 29 63 17 49 30 10 .. 97 . 30 64 17 80 31 10 .. 98 . 30 65 17 111 32 10 .. 99 . 30 66 18 30 33 10 .. 100 . 31 67 18 61 34 11 1 .. . 31 68 18 92 35 11 2 .. . 02 69 19 11 36 11 3 .. . 93 70 19 42 37 12 4 .. 1 12 71 19 73 38 12 5 .. 1 43 72 19 104 39 12 6 .. 1 74 73 20 23 40 13 7 .. 1 105 74 20 54 41 13 8 .. 2 24 75 20 85 42 13 9 .. 2 55 76 21 4 43 13 10 .. 2 86 77 21 35 44 14 11 .. 3 5 78 21 66 45 14 12 .. 3 36 79 21 97 46 14 13 .. 3 67 80 22 16 47 15 14 .. 3 98 81 22 47 48 15 15 .. 4 17 82 22 78 49 15 16 .. 4 48 83 22 109 50 16 17 .. 4 79 84 23 28 51 16 18 .. 4 110 85 23 59 52 16 19 .. 5 29 86 23 90 53 16 20 .. 5 60 87 24 9 54 17 21 .. 5 91 88 24 40 55 17 22 .. 6 10 89 24 71 56 17 23 .. 6 41 90 24 102 57 18 24 .. (i 72 91 25 21 58 18 25 .. 6 103 92 25 52 59 18 26 .. 7 22 93 25 83 60 19 27 .. 7 53 94 26 2 61 19 28 .. 7 84 95 26 33 62 19 29 .. 8 3 96 26 64 63 19 30 .. 8 34 97 26 95 64 20 31 .. 8 65 98 27 14 65 20 32 .. 8 96 99 27 45 66 20 33 .. 9 15 100 27 76 67 21 34 .. 9 46

Size of sheet before working, 20 X 28 inches. Exposed on roof 27X 17 3/4 inches Square inches per sheet exposed 479 1/4 inches. Sheets per box 112.

 NET WEIGHT PER BOX TIN PLATESBasis 14 x 20 , 112 Trade term. 80-lb. 85-lb. 90-lb. 95-lb. 100-lb. IC IXL IX IXX IXXX IXXX X Weight per box, lb. 80 85 90 95 100 107 128 135 155 175 195 Size of sheets Sheets per box 80 85 90 95 100 107 128 135 155 175 195 10 x 14 225 14 x 20 112 80 85 90 95 100 107 128 135 155 175 195 20 x 28 112 160 170 180 190 200 214 256 270 310 350 390 10 x 20 225 114 121 129 136 143 153 183 193 221 250 279 11 x 22 225 138 147 156 164 172 184 232 234 268 302 337 11 1/2 x 23 225 151 161 170 179 189 202 242 255 293 331 368 12 x 12 225 82 87 93 98 103 110 132 139 `59 180 201 12 x 24 112 82 87 93 &9632;98 103 110 132 139 159 180 201 13 x 13 225 97 103 109 115 121 129 154 163 187 211 235 13 x 26 112 97 103 109 115 121 129 154 163 187 211 235 14 x 14 225 112 119 126 133 140 150 179 189 217 245 273 14 x 28 112 112 119 126 133 140 160 179 189 217 245 273 i15 x 15 225 129 137 145 153 161 172 206 217 249 281 313 16 x 16 225 146 155 165 174 183 196 234 247 283 320 357 17 x 17 225 165 175 186 196 206 221 264 279 320 361 403 18 x 18 112 93 98 104 110 116 124 148 156 179 202 226 19 x 19 112 103 110 116 122 129 l -138 165 174 200 226 251 20 x 20 112 114 121 129 136 143 153 183 193 221 260 279 21 x 21 112 126 134 142 150 158 169 202 213 244 276 307 22 x 22 112 138 147 156 164 172 184 221 234 268 302 337 23 x 23 112 151 161 170 179 189 202 242 255 296 331 368 24 x 24 112 164 175 185 195 204 220 363 278 319 360 401 26 x 26 112 193 205 217 229 241 258 309 326 374 422 471 16 x 20 112 91 97 103 109 114 122 146 154 177 200 223 14 x 31 112 124 132 140 147 155 166 198 209 240 271 302 11 1/4 x 22 1/4 112 73 78 82 87 91 98 13 1/4 x 17 3/4 112 60 71 76 80 84 90 13 1/4 x 19 1/2 112 73 77 82 87 91 97 13 1/2 x 19 1/2 112 75 80 85 89 94 100 13 1/2 x 19 3/4 112 76 81 86 90 95 &9632;102 14 x 18 3/4 124 83 88 93 98 103 110 14 x 19 1/4 120 83 88 93 98 103 110 14 x 21 112 84 89 95 100 105 112 14 x 22 112 88 94 99 105 110 118 14 x 22 1/4 112 89 95 100 106 111 119 151/2 x 23 112 102 108 115 121 127 136
 STANDARD WEIGHTS AND GAUGES OF TIN PLATES Trade term .. 65-lb. 70-lb. 75-lb. 80-lb. 85-lb. 90-lb. 95-lb. 100-lb. Nearest wire gauge No. . 35 35 34 33 32 31 31 30 Weight, square foot, lb. . .298 .322 .345 .367 .390 .413 .436 .459 &9632;Weight, box, 14 x 20, lb. . 65 70 75 80 85 90 95 100 Trade term ..... IC IXL IX IXX IXXX IXXXX Nearest wire gauge No. . 30 28 28 27 26 25 24 Weight, square foot, lb. . 491 .588 .619 .712 .803 .895 .987 Weight, box, 14 x 20. lb. . 107 128 135 155 175 195 215 IC 14 x 20 IC 20 x 28 IX 14 x 20 IX 20 x 28 Black plates before coating lb. lb. lb. lb. weight per 112 sheets 95 to 100 190 to 200 125 to 130 250 to 260 When coated the plates.weigh per 112 sheets . 115 to 120 230 to 240 145 to 150 290 to 300