BS 1139-2.1:1991
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Metal scaffolding. Couplers Specification for steel couplers, loose spigots and base-plates for use in working scaffolds and falsework made of steel tubes
Hardcopy , PDF
English
31-01-1991
31-08-2006
Brief history
1. Object and field of application
2. References
3. Definitions
3.1 Coupler
3.2 Right angle coupler (RA)
3.3 Swivel coupler (SW)
3.4 Parallel coupler (PA)
3.5 Sleeve coupler (SF or SS)
3.6 Loose spigot (LS)
3.7 Base-plate (BP)
4. Symbols
4.1 Measured values
4.2 Statistical values
5. Materials and design
5.1 Materials
5.2 Data required from the manufacturer for
assessment purposes
6. Requirements
6.1 Design requirements
6.2 Required characteristics for couplers under
load (see clause 9)
6.3 Requirements in the case of design alteration
7. Sampling for prototype tests
8. Assessment methods
8.1 Assessment without statistical analysis
8.2 Assessment with statistical analysis
9. Load tests for prototype couplers
9.1 General
9.2 Testing of behaviour under load of right angle
couplers
9.3 Testing of behaviour under load of swivel couplers
9.4 Determination of the ultimate load for right angle
and swivel couplers
9.5 Testing of the torsional rigidity of right angle
couplers
9.6 Tensile tests on friction type sleeve couplers
9.7 Bending load capacity testing of class B sleeve
couplers
9.8 Tensile testing of sleeve couplers with sheer
pins
9.9 Testing of behaviour under load of parallel
couplers
9.10 Determination of the ultimate load for parallel
couplers
Tables
1. Summary of requirements for testing the behaviour
under load of prototype couplers specified in
clauses 8 and 9
2. Examples of sampling plans for inspection by
attributes
3. Examples of sampling plans for inspection by
variables
4. Flow diagram giving instructions for random
sampling when testing the behaviour of right angle
couplers, swivel couplers, sleeve couplers or
parallel couplers by attributes or by variables
Figures
1. Maximum clearance between centring device and tube
2. Operating characteristics
3. Test apparatus
a) to test the behaviour under load of right angle
couplers
b) to test the behaviour under load of swivel
couplers
c) to determine the ultimate load of right angle
and swivel couplers
4. Test apparatus to determine the torsional rigidity
of right angle couplers
5. Angle of rotation phi against the torque M for
class B right angle couplers
6. Test apparatus for tensile testing of sleeve
couplers
7. Test apparatus for bending load capacity testing
of class B sleeve couplers
8. Test apparatus for investigating the behaviour
under load of parallel couplers
9. Test apparatus to determine the ultimate load of
parallel couplers
Requirements for materials and design and test procedures for couplers, loose spigots and base plates used for connecting steel tubes of 48.3 mm outside diameter and of at least 3.2 mm nominal wall thickness.
| Committee |
B/514
|
| DevelopmentNote |
Supersedes 85/15498 DC and BS 1139-2(1982). Also numbered as EN 74. (06/2005)
|
| DocumentType |
Standard
|
| Pages |
28
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
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