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BSI 21/30412754 DC:2021 Edition

BSI 21/30412754 DC:2021 Edition

$13.70

BS 1139-6. Metal scaffolding – Part 6. Prefabricated tower scaffolds outside the scope of BS EN 1004, but utilizing components from such systems. Specification

Published By Publication Date Number of Pages
BSI 2021 37
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PDF Catalog

PDF Pages PDF Title
1 Form 36_30412754.pdf
3 BS 1139-6 DPC (1).pdf
7 1 Scope
2 Normative references
3 Terms and definitions and symbols
3.1 Terms and definitions
3.1.1 prefabricated tower scaffold
8 3.1.2 standard configuration
3.1.3 non-standard configuration
3.1.4 prefabricated tower scaffold standard configurations
3.1.4.1 cantilever tower scaffold
3.1.4.2 large deck tower scaffold
9 3.1.4.3 linked tower scaffold
3.1.4.4 stepped tower scaffold
3.1.4.5 high level tower scaffold
10 3.1.5 prefabricated tower scaffold components
3.1.5.1 base plate
3.1.5.2 end frame
3.1.5.2.1 walk through end frame
11 3.1.5.2.2 step through end frame
3.1.5.2.3 portal end frame
3.1.5.3 high clearance frame
3.1.5.4 bridge beam
12 3.1.5.5 bridge deck
3.1.5.6 platform unit
3.1.6 working platform level
3.1.8 cantilever platform
13 3.1.9 bay
3.1.10 cladding
3.1.11 netting
3.1.12 sheeting
14 3.1.13 tie
3.1.14 anchor
3.1.15 supplier
3.1.16 application
3.1.17 use
3.1.18 alteration
3.1.19 user
3.1.20 variation
3.2 Symbols
4 Classification
4.1 Load classes
15 4.2 Access classes
4.3 Height classes
4.4 Configuration classes
4.5 Wind classes
5 Materials
16 6 General requirements
6.1 General
6.1.1 Standard configurations
6.2 Dimensions
17 6.2.1 High clearance frames
6.2.2 Walk through end frames
18 6.2.3 Step through end frames
6.2.4 Portal end frames
19 6.3 Openings within platforms
6.4 Side protection
6.5 Castor wheels and base plates
6.6 Access to platforms
6.7 Means for stabilizing
6.7.1 Stabilizers and outriggers
6.7.2 Ballast
20 6.7.3 Tying in
6.8 Connections
6.9 Working and access platform units
6.10 Assembly and dismantling
6.11 Requirements for prefabricated tower scaffolds less than 2 m working platform height
6.12 Requirements for prefabricated tower scaffolds used for access to another place
6.13 Vertical distances between platforms
6.13.1 Requirements for platforms used for vertical ascent and descent and work
21 6.13.2 Requirements for platforms used only for work and not for vertical ascent or descent
7 Requirements for structural design
7.1 General
23 7.1.1 Cladding
7.1.2 Internal and external support
7.2 Characteristic actions on the complete structure including its parts
7.2.1 Vertical loads
7.2.1.1 Tower nominal self-weight as given by the manufacturer
7.2.1.2 Uniformly distributed load on the working platform(s)
24 7.2.1.3 Load resulting from an inclination of 1%
7.2.1.4 Minimum vertical service load on the structure, equally distributed on four legs
7.2.2 Horizontal loads
7.2.2.1 Horizontal service loads
7.2.2.2 Horizontal loads to simulate wind
7.3 Characteristic actions on parts of the structure
7.3.1 Loads on platform units
7.3.2 Load on side protection
7.3.2.1 Downward load
7.3.2.2 Horizontal loads
25 7.3.3 Loads on stairways and stairladders
7.3.4 Load on inclined ladders
7.3.5 Load on vertical ladder
7.4 Deflections
7.4.1 Elastic deflection of platform components
7.4.2 Elastic deflection of side protection
8 Structural design
8.1 Basic design principle
8.1.1 Introduction
8.1.2 Structural design of components
8.1.2.1 Steel
8.1.2.2 Aluminium
8.1.2.3 Timber
26 8.1.2.4 Other materials
8.1.3 Limit states
8.2 Structural analysis
8.3 Verification
8.3.1 General, partial safety factors and ultimate limit state
8.3.2 Side protection
8.3.3 Serviceability limit state
8.3.4 Verification report
27 8.3.5 Design certificate
8.4 Positional stability
8.4.1 General
8.4.2 Load Case 1
8.4.2.1 Safety factor
8.4.2.2 Vertical loads
8.4.2.3 Horizontal loads
28 8.4.2.4 Additional loads
8.4.3 Load Case 2
8.4.3.1 Safety factor
8.4.3.2 Vertical loads
8.4.3.3 Horizontal loads
8.4.3.4 Additional loads
8.4.4 Special load case for cantilever tower scaffolds
9 Deflection
10 Information to be supplied with the prefabricated tower scaffold
10.1 General
30 10.2 Identification of components in the structure
10.2.1 Assembly, permissible alterations and dismantling
31 10.3 Inspection information
32 10.4 Stability
10.5 Application and moving
10.5.1 The instruction manual or assembly use and dismantling plan shall give at least the following information regarding what should be checked before each application of the prefabricated tower scaffold as an addition to the checks made during the …
10.5.2 The instruction manual or assembly, use and dismantling plan shall give guidelines for the safe application of the prefabricated tower scaffold.
10.5.3 The instruction manual or assembly, use or dismantling plan shall give information regarding the means of access to the prefabricated tower scaffold.
10.5.4 The instruction manual or assembly, use and dismantling plan shall give guidelines for the lifting of tools and materials to the working platform of the prefabricated tower scaffold within the limits of the permitted load and stability.
10.5.5 The instruction manual or assembly, use and dismantling plan shall detail the procedure for moving the prefabricated tower scaffold, including:
33 10.5.6 The instruction manual or assembly, use and dismantling plan shall state at least the following safety information:
34 10.6 Inspection, care and maintenance
11 Marking
12 Assessment
36 Annex A (informative) Contents of an assembly, use and dismantling plan
A.1 General
A.2 Assembly, Use and Dismantling Plan contents
A.3 Engineering drawing
A.4 Method statement
37 A.5 Risk assessment
A.6 Instruction manual(s)
A.7 Rescue plan
A.8 Handover/Inspection records

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BSI 21/30412754 DC
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