final-report-of-the-advisory-committee-on-falsework-bragg-report - Flipbook - Page 5
'
Introduction 7
Principal recommendations
1 Falsework collapses
Historical perspective
Temporary Works Co-ordinator
Summary 73
Responsibility and liability 73
8
6 Training and manpower
12
Professional training 80
Course standards 84
CITB facilities 84
Certification 85
Incentives 85
Time scale 86
Financial arrangements 87
Trade Unions 87
Need for a textbook of falsework technology
Summary 88
2 Technical reasons for collapse
Stability in the horizontal plane 20
Progressive collapse 24
Overloads 24
Inadequate foundations 24
Support of beams 28
Grillages 30
Tolerances and eccentricities 30
Faulty setting-out 34
Defective or inadequate materials 34
Dismantling 34
Conclusions 35
4 Technical recommendations
Estimation of loads 46
Identifiable horizontal forces 46
3 % horizontal load rule 48
Lateral stability 48
Bracing and lacing 51
Longitudinal stability 55
Selection of materials and equipment
Proprietary equipment 59
Tolerances 61
Factors of safety 62
Research and development 63
5 Recommended procedures
68
87
7 Implementation of recommendations
Statutory enforcement 90
BSI Code of Practice 91
3 Procedural inadequacies
Design brief 38
Construction industry in Britain 40
Construction industry abroad 41
West Germany 41
USA 42
Canada 43
Choice of parties 66
The design brief 66
Acceptance of falsework drawings
Loading of falsework 70
General site procedures 71
71
56
Appendices
1 Case studies 93
Second Narrows Bridge, Inquiry
British Columbia, 1958 93
Welshpool Road Overpass,
Western Australia 1966 97
Heron Road Bridge, Ontario 1966 100
Birling Road Overbridge, Kent 1971 103
Arroyo Seco Bridge, California 1972 107
River Loddon, Berkshire 1972 111
Skyline Plaza, Fairfax County,
Virginia 1973 117
Summary of a selection of falsework
collapses 120
Details of some inspections carried out by
HMFI following Loddon 127
2 Organisations giving evidence 130
3 Persons giving evidence 131
4 Papers considered by the committee 132
5 Proposed outline syllabus for appreciation
courses 138
Index
141
5
