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BS EN 1004-1:2020

BS EN 1004-1:2020

$167.15

Mobile access and working towers made of prefabricated elements – Materials, dimensions, design loads, safety and performance requirements

Published By Publication Date Number of Pages
BSI 2020 44
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This document applies to the design of mobile access and working towers made of prefabricated elements with dimensions which are fixed by the design and with a height up to 12 m (indoors) and up to 8 m (outdoors). This document applies to mobile access and working towers used as temporary work equipment.

This document:

  • gives guidelines for the choice of the main dimensions and stabilizing methods,

  • gives safety and performance requirements, and

  • gives information on complete towers.

This product standard does not apply to scaffolds according to EN 12810‑1 and EN 12811‑1.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms and definitions
11 4 Classification
4.1 Load classes
4.2 Access classes
4.3 Height classes
12 5 Designation
6 Materials
7 General requirements
7.1 General
14 7.2 Dimensions
7.3 Openings within platforms
7.3.1 Access openings
7.3.2 Apertures
7.4 Side protection
7.4.1 General
15 7.4.2 Principal guardrail
7.4.3 Intermediate side protection
16 7.4.4 Toe-board
7.5 Castor wheels
7.5.1 General
7.5.2 Brakes
7.5.3 Test loads
7.5.4 Wheels
17 7.6 Access to platforms
7.6.1 Access types
7.6.2 General requirements
7.6.3 Additional requirements
7.6.3.1 Stairway and stairladder
18 7.6.3.2 Access type A – stairway (see Figure 4)
7.6.3.3 Access type B – stairladder (see Figure 5)
19 7.6.3.4 Access type C – inclined ladder (see Figure 6)
7.6.3.5 Access type D -vertical ladder (see Figure 7)
20 7.7 Means for stabilizing
7.7.1 Stabilizers and outriggers
7.7.2 Ballast
7.8 Connections
7.8.1 General
21 7.8.2 Vertical spigot and socket connection
7.8.3 Other vertical connections
7.9 Working and access platform units
7.10 Erection and dismantling
7.11 Requirements for mobile access towers less than 2 m working platform height
7.11.1 Requirements for access
22 7.11.2 Requirements for positional stability when accessing from outside
7.11.2.1 General
7.11.2.2 Safety factor
7.11.2.3 Vertical loads
8 Requirements for structural design
8.1 General
8.2 Characteristic actions on the complete structure including its parts
8.2.1 Verticals loads
8.2.1.1 Tower nominal self-weight as given by the manufacturer
8.2.1.2 Uniformly distributed load on the topmost platform
8.2.1.3 Load resulting from an inclination of 1 %
23 8.2.1.4 Minimum vertical service load on the structure, equally distributed on 4 legs
8.2.2 Horizontal loads
8.2.2.1 Horizontal service load on the topmost platform
8.2.2.2 Horizontal loads on all components to simulate wind
8.3 Characteristic actions on parts of the structure
8.3.1 Loads on platform units
8.3.2 Load on side protection
8.3.2.1 Downward load
24 8.3.2.2 Horizontal load
25 8.3.3 Load on stairways and stairladders
26 8.3.4 Load on inclined ladders
8.3.5 Load on Vertical ladder
8.4 Deflections
8.4.1 Elastic deflection of platform components
8.4.2 Elastic deflection of side protection
9 Structural design
9.1 Basic design principle
9.1.1 Introduction
27 9.1.2 Structural design of components
9.1.2.1 Steel
9.1.2.2 Aluminium
9.1.2.3 Timber
9.1.2.4 Other materials
9.1.3 Limit states
9.2 Structural analysis
9.2.1 Choice of a model
28 9.2.2 Imperfections
9.2.2.1 General
9.2.2.2 Inclinations between vertical components
29 9.2.3 Rigidity assumptions
9.2.3.1 Joints between tubular members
9.2.3.2 Connecting devices
30 9.2.4 Resistance
9.2.4.1 General
9.2.4.2 Connecting devices
9.3 Verification
9.3.1 General
9.3.2 Partial safety factors
9.3.2.1 Partial safety factors for actions, γF
9.3.2.2 Partial safety factors for material resistances, γM
9.3.3 Ultimate limit state
9.3.3.1 General
31 9.3.3.2 Tubular members
9.3.3.3 Joints between tubular members
9.3.3.4 Side protection
32 9.3.4 Serviceability limit state
9.4 Positional stability
9.4.1 General
9.4.2 Load cases
9.4.2.1 General
9.4.2.2 Load case 1
33 9.4.2.3 Load case 2
10 Tests
11 Instruction manual
12 Marking
12.1 Components
34 12.2 Manufacturer’s label
13 Assessment
35 Annex A (normative)Stiffness test on complete tower structure
A.1 General requirements (see Figures A.1 and A.2)
A.2 Test structure
A.3 Test method
A.4 Result of test (see Figure A.2)
38 Annex B (informative)A-deviations
39 Annex C (informative)Reduction of the wind load to equal members being upwind

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BS EN 1004-1:2020
$167.15