3 Equal Roll Trough

Area (ft2)

Belt
Width

Surcharge
Angle (β)

Trough angle (α)

20°

30°

35°

45°

16"

0°

0.065

0.097

0.108

0.129

5°

0.075

0.108

0.118

0.140

10°

0.097

0.118

0.129

0.151

15°

0.108

0.129

0.140

0.161

20°

0.118

0.151

0.151

0.172

25°

0.140

0.161

0.172

0.183

30°

0.151

0.172

0.183

0.194

18"

0°

0.086

0.118

0.140

0.161

5°

0.108

0.140

0.151

0.183

10°

0.118

0.161

0.172

0.194

15°

0.140

0.172

0.183

0.205

20°

0.161

0.194

0.205

0.226

25°

0.183

0.215

0.226

0.237

30°

0.205

0.226

0.237

0.248

20"

0°

0.108

0.161

0.172

0.205

5°

0.129

0.183

0.194

0.226

10°

0.161

0.205

0.215

0.248

15°

0.183

0.226

0.237

0.258

20°

0.205

0.248

0.258

0.280

25°

0.226

0.269

0.280

0.301

30°

0.258

0.291

0.301

0.323

24"

0°

0.172

0.237

0.269

0.312

5°

0.205

0.269

0.301

0.344

10°

0.237

0.301

0.334

0.366

15°

0.269

0.334

0.355

0.398

20°

0.312

0.366

0.388

0.420

25°

0.344

0.398

0.420

0.452

30°

0.388

0.441

0.463

0.484

30"

0°

0.280

0.388

0.441

0.517

5°

0.334

0.441

0.484

0.560

10°

0.388

0.495

0.538

0.603

15°

0.441

0.549

0.592

0.646

20°

0.506

0.603

0.635

0.689

25°

0.560

0.657

0.689

0.732

30°

0.624

0.710

0.743

0.786

36"

0°

0.409

0.581

0.657

0.764

5°

0.495

0.657

0.721

0.829

10°

0.581

0.732

0.797

0.893

15°

0.657

0.807

0.872

0.958

20°

0.743

0.893

0.947

1.023

25°

0.840

0.969

1.023

1.087

30°

0.926

1.055

1.109

1.163

42"

0°

0.570

0.807

0.904

1.066

5°

0.689

0.915

1.012

1.152

10°

0.797

1.023

1.109

1.238

15°

0.915

1.130

1.206

1.335

20°

1.033

1.238

1.313

1.421

25°

1.163

1.356

1.421

1.518

30°

1.292

1.464

1.528

1.604

48"

0°

0.753

1.076

1.206

1.421

5°

0.904

1.216

1.335

1.528

10°

1.066

1.356

1.475

1.647

15°

1.216

1.496

1.604

1.765

20°

1.378

1.647

1.744

1.884

25°

1.539

1.787

1.884

2.002

30°

1.711

1.948

2.034

2.131

3 Equal Roll Trough

Area (ft2)

Belt
Width

Surcharge
Angle (β)

Trough angle (α)

20°

30°

35°

45°

54"

0°

0.969

1.378

1.550

1.819

5°

1.163

1.550

1.711

1.959

10°

1.356

1.733

1.884

2.110

15°

1.561

1.916

2.056

2.260

20°

1.765

2.099

2.228

2.411

25°

1.970

2.293

2.411

2.562

30°

2.185

2.486

2.594

2.723

60"

0°

1.206

1.711

1.927

2.260

5°

1.453

1.938

2.142

2.443

10°

1.701

2.164

2.347

2.626

15°

1.948

2.390

2.562

2.809

20°

2.196

2.616

2.777

3.003

25°

2.400

3.929

3.003

3.197

30°

2.723

3.100

3.240

3.391

66"

0°

1.442

2.045

2.303

2.702

5°

1.744

2.325

2.573

2.928

10°

2.045

2.594

2.809

3.143

15°

2.336

2.863

3.068

3.358

20°

2.626

3.132

3.326

3.595

25°

2.831

3.412

3.595

3.832

30°

3.261

3.714

3.886

4.058

72"

0°

1.765

2.508

2.820

3.305

5°

2.120

2.831

3.132

3.574

10°

2.476

3.154

3.434

3.843

15°

2.842

3.488

3.746

4.112

20°

3.208

3.821

4.058

4.381

25°

3.584

4.166

4.381

4.661

30°

3.972

4.521

4.725

4.951

80"

5°

2.669

3.638

3.929

4.489

10°

3.122

3.983

4.338

4.844

15°

3.563

3.638

4.704

5.156

20°

4.047

4.822

5.124

5.533

25°

4.489

5.328

5.500

5.845

30°

5.005

5.705

5.963

6.254

84"

0°

2.433

3.444

3.875

4.553

5°

2.928

3.907

4.306

4.919

10°

3.412

4.349

4.725

5.285

15°

3.907

4.801

5.145

5.651

20°

4.402

5.253

5.586

6.017

25°

4.919

5.726

6.028

6.405

30°

5.457

6.211

6.491

6.803

88"

0°

2.766

3.907

4.392

5.145

5°

3.261

4.435

4.801

5.479

10°

3.843

4.898

5.317

5.942

15°

4.349

5.436

5.737

6.286

20°

4.962

5.909

6.286

6.770

25°

5.479

6.491

6.706

7.115

30°

6.125

6.986

7.287

7.642

96"

0°

3.305

4.650

5.220

6.114

5°

3.853

5.307

5.673

6.469

10°

4.564

5.813

6.297

7.040

15°

5.134

6.501

6.770

7.416

20°

5.877

6.997

7.449

8.008

25°

6.469

7.653

7.911

8.385

30°

7.244

8.267

8.611

9.031