Rolling Lift Bridges in Practice

About the Author xi

Preface xiii

Acknowledgments xvii

Abbreviations and Symbols xix

Part I Historical Considerations 1

1 Heaven and Earth, Water and Fire 3

Note 5

2 Seas, Lakes, Rivers, Canals 7

Notes 10

3 Chicago, Illinois 11

Note 13

4 Peru, Illinois 15

5 The Mid-nineteenth-Century Generation 17

Notes 21

6 The Hazelet and Meals Families 23

Notes 26

7 The Sanitary District of Chicago 29

8 William D. Scherzer, Engineer and Inventor 31

Note 34

9 Scherzer Rolling Lift Bridge Co. ? The Early Years 35

Notes 40

10 Chicago's Bridge Department 41

Notes 47

11 Albert Scherzer's Death 49

Notes 55

12 Keller & Harrington 57

Notes 58

13 The Scherzer Rolling Lift Bridge Co. 1922-1936 59

Note 60

14 Hazelet & Erdal 61

Notes 65

Part II Technical Considerations 67

15 Early Movable Bridge Types 69

Notes 74

16 Modern Bascule Bridges 75

Note 81

17 Myths, Misunderstandings, and Factual Errors 83

Notes 95

18 Loads and Leaf Balance 97

Notes 104

19 Structural Forms for Bascule Spans 105

20 Foundations 111

Notes 116

21 Treads, Tracks, and Their Girders 117

Segmental Girders and Track Girders 141

Notes 145

22 Bascule Structure 147

Notes 161

23 Mid-span Shear Locks 163

Notes 169

24 Operating Systems 171

Notes 179

25 Safety Features 181

Notes 186

Appendix A List of Rolling Lift Bridges 187

Appendix B List of US Patents 201

Bibliography 205

Index 213

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• Tecnologia de transporte e comércio
• Pontes

Scherzer bridge; rolling lift bridge; movable bridge; bridge engineering; bascule bridge; rolling lift bridge structural engineering; rolling lift bridge planning; Scherzer bridge history; Scherzer bridge mechanics; rolling lift bridge principles