BS 4429:1987
Current
The latest, up-to-date edition.
Specification for rigging screws and turnbuckles for general engineering, lifting purposes and pipe hanger applications
Hardcopy , PDF
English
30-04-1987
Foreword
Committees responsible
Specification
Section one. General requirements
1.1 Scope
1.2 Definitions
1.3 Lifting applications
1.4 Size
1.5 Tolerance on dimensions
1.6 Heat treatment
1.7 Hot dip galvanizing
1.8 Screw threads
1.9 Freedom from defects
1.10 Proof loading
1.11 Marking
1.12 Test certificate
Section two. Specific requirements for rigging screws
2.1 General
2.2 Tubular body
2.3 Workmanship
2.4 Attachments
2.5 Types of rigging screw
2.6 Open and closed dimensions
2.7 Safe working loads
Section three. Specific requirements for turnbuckles
3.1 General
3.2 Designation
3.3 Open body
3.4 Workmanship
3.5 Attachments
3.6 Types of turnbuckle
3.7 Open and closed dimensions
3.8 Safe working loads
Section four. Specific requirements for attachments
4.1 General
4.2 Screwed elongated eyes
4.3 Screwed forks
4.4 Screwed trapezoidal hooks
4.5 Lock-nuts
Appendices
A Information to be supplied by the purchaser with
the enquiry and order
B Notes on design
C Selection, application and use of rigging screws
and turnbuckles for lifting applications
Tables
1 Recommended maximum sizes of marking stamps
2 Tubular bodies for rigging screws
3 Open and closed dimensions (H) and safe working
loads for rigging screws
4 Hexagon-ended open bodies for turnbuckles
5 Open and closed dimensions (H) and safe working
loads for turnbuckles
6 Screwed elongated eyes
7 Screwed forks (supplied complete with bolt and
nut)
8 Screwed trapezoidal hooks for turnbuckles
9 Types of defect found in in-service inspections
and actions to be taken in the event of a defect
Figures
1 Tubular body for rigging screws
2 Types of rigging screw
3 Hexagon-ended open body for turnbuckles
4 Types of turnbuckle
5 Screwed elongated eye
6 Screwed fork
7 Screwed trapezoidal hook for turnbuckles
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