Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

Recommendations

Info

Downloaded From : www.EasyEngineering.netSlipforms 417Vertical reinforcingJackrod connecting stud- by scanada -Jackrod- by scanada -Reinforcing template guideBraceLevelling device- by scanada -2000 mm (min.)Postww.EasyEngineering.nHydraulic jack- by scanada -STD. yoke type 9A- by scanada -510 mm12" Lg.wedgeJackrod stiffener- by scanada -Yoke wedge(Typ.)1200 (form)Yoke collars(Typ.)SlipformHorizontalreinforcingFIGURE 15-2 Essential parts of a slipform assembly. (Source: ScanadaInternational, Inc.)Downloaded From : www.EasyEngineering.net
418 Chapter FifteenDownloaded From : www.EasyEngineering.netSheathingFor structures that include walls with inner and outer surfaces, twosets of sheathing are required. The sheathing may be made of dressedand matched lumber, such as 1 × 4 or 1 × 6 boards installed vertically,¾-in. plywood with the grain installed vertically, or sheet steel. Steelhas a longer life and a lower friction drag on the concrete than boardsor plywood. The sheathing usually varies in height from 3 ft 6 in. to 5ft 0 in.; a height of 4 ft 0 in. is commonly used. The opposite faces ofthe sheathing should be about ¼ in. wider at the bottom than at thetop, to reduce the friction and to ease the release of the concrete fromthe forms.ww.EasyEngineering.nWales or RibsAs illustrated in Figure 15-2, the sheathing is usually held in alignmentby two rows of wales or ribs on each side. For structures with planefaces, such as buildings and piers, the wales are typically assemblies ofthree-ply 2 × 8 or 2 × 10 lumber planks nailed together. However, forstructures having curved surfaces, such as silos, the wales usually arethree-ply 2 × 6 or 2 × 8 lumber planks sawed to the required curvature.The end joints between lumber planks in a rib should be staggered.Steel wales are generally used with steel sheathing. The wales serve thefollowing purposes:1. They support and hold the sheathing in position.2. They support the working platform.3. They support the suspended scaffolding.4. They transmit the lifting forces from the yokes to the formsystem.5. They act as horizontal beams between the yokes to resist thelateral pressures of the concrete.YokesEach yoke consists of a horizontal cross member connected to a jack,plus a yoke for each set of sheathing and wales. As illustrated inFigure 15-2, the top of each leg is attached to the cross member, andthe lower end is attached to the bottom wale.The yokes serve two purposes. They transmit the lifting forcesfrom the jacks to the wales. The yoke legs must also hold the sheathingin the required positions and resist the lateral pressures of theconcrete, because form ties cannot be used to maintain the requiredspacing between the form sheathings.Downloaded From : www.EasyEngineering.net
Page 1 and 2:
ww.EasyEngineering.nDownloaded From
Page 3 and 4:
Downloaded From : www.EasyEngineeri
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
2 Chapter OneDownloaded From : www.
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
8 Chapter TwoDownloaded From : www.
Page 35 and 36:
10 Chapter TwoDownloaded From : www
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
22 Chapter ThreeDownloaded From : w
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 62 and 63:
Page 64 and 65:
38 Chapter ThreeExample 3-7A floor
Page 66 and 67:
Page 68 and 69:
42 Chapter FourDownloaded From : ww
Page 70 and 71:
Page 72 and 73:
Page 75:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 99:
Page 103:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
88 Chapter FiveDownloaded From : ww
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
100 Chapter FiveDownloaded From : w
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
120 Chapter FiveExample 5-12Class I
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
164 Chapter SixDownloaded From : ww
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
186 Chapter SevenDownloaded From :
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
198 Chapter EightDownloaded From :
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
Page 245 and 246:
Page 247 and 248:
Page 249 and 250:
212 Chapter NineDownloaded From : w
Page 251 and 252:
Page 253 and 254:
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
Page 266 and 267:
Page 268 and 269:
Page 270 and 271:
Page 272 and 273:
Page 274:
Page 278:
Page 282 and 283:
Page 284 and 285:
Page 286 and 287:
Page 288 and 289:
Page 290 and 291:
Page 292 and 293:
Page 294 and 295:
Page 296 and 297:
Page 298 and 299:
Page 300 and 301:
Page 302 and 303:
ww.EasyEngineering.n260 Chapter Nin
Page 304 and 305:
Page 306 and 307:
Page 308 and 309:
Page 310 and 311:
Page 312 and 313:
Page 314 and 315:
Page 316 and 317:
Page 318 and 319:
Page 320 and 321:
Page 322 and 323:
Page 324 and 325:
Page 326 and 327:
284 Chapter TenDownloaded From : ww
Page 328 and 329:
Page 330 and 331:
Page 332 and 333:
Page 334 and 335:
Page 336 and 337:
Page 338 and 339:
Page 340 and 341:
Page 342 and 343:
Page 344 and 345:
Page 346 and 347:
ww.EasyEngineering.n304 Chapter Ten
Page 348 and 349:
Page 351 and 352:
Page 353 and 354:
Page 355 and 356:
Page 357 and 358:
Page 359 and 360:
Page 361 and 362:
Page 363 and 364:
320 Chapter ElevenDownloaded From :
Page 365 and 366:
Page 367 and 368:
Page 369 and 370:
Page 371 and 372:
Page 373 and 374:
Page 375 and 376:
Page 378:
Page 382:
Page 385 and 386:
Page 387 and 388:
Page 389 and 390:
Page 391 and 392:
Page 393 and 394:
Page 395 and 396:
Page 397 and 398:
Page 399 and 400:
Page 401 and 402:
Page 403 and 404:
Page 405 and 406:
Page 407 and 408:
Page 409 and 410:
Page 411 and 412:
Page 413 and 414: 366 Chapter TwelveDownloaded From :
Page 423 and 424: Downloaded From : www.EasyEngineeri
Page 429 and 430: 382 Chapter ThirteenDownloaded From
Page 443 and 444: 396 Chapter FourteenDownloaded From
Page 463: ww.EasyEngineering.n416 Chapter Fif
Page 467 and 468: 420 Chapter FifteenDownloaded From
Page 471 and 472: ww.EasyEngineering.n424 Chapter Fif
Page 479 and 480: 432 Chapter SixteenDownloaded From
Page 489: Downloaded From : www.EasyEngineeri
Page 501 and 502: 452 Chapter SeventeenDownloaded Fro
Page 515 and 516:
466 Appendix ADownloaded From : www
Page 517 and 518:
468 Appendix ADownloaded From : www
Page 519 and 520:
Page 521 and 522:
472 Appendix BDownloaded From : www
Page 523 and 524:
Page 525 and 526:
Page 527 and 528:
ww.EasyEngineering.n478 Appendix BD
Page 529 and 530:
Page 531 and 532:
Page 533 and 534:
Page 535 and 536:
Page 537 and 538:
Page 539 and 540:
Page 541 and 542:
Page 543 and 544:
494 Appendix CDownloaded From : www
Page 545 and 546:
Page 547 and 548:
Page 549 and 550:
Page 551 and 552:
Page 553 and 554:
ww.EasyEngineering.n504 Appendix CD
Page 555 and 556:
Page 557 and 558:
508 Appendix EDownloaded From : www
Page 559 and 560:
510 Appendix EDownloaded From : www
Page 561 and 562:
Page 563 and 564:
Page 565 and 566:
Page 567:
show all

Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?