BS 5975:1982

Foreword
Cooperating organizations
Code of practice
Section one. General
1 Scope
2 References
3 Definitions
4 Symbols
5 Legislation
Section two. Procedures
6 General
7 Formality of procedures
8 Design brief
9 Communication of requirements
10 Coordination and supervision
11 Checking
12 Alterations
13 Loading the falsework
14 Dismantling
Section three. Materials and components
15 General considerations
16 Testing and inspection
17 Steelwork (other than scaffold tube)
18 Timber
19 Concrete and concrete components
20 Brickwork and blockwork
21 Other materials
22 Steel scaffold tubes, couplers and other fittings
23 Manufactured components for falsework
Section four. Loads applied to falsework
24 General
25 Weights of materials
26 Self-weights
27 Imposed loads
28 Environmental loads
Section five. Foundations and ground conditions
29 General
30 Site investigation for falsework foundations
31 Testing of soils
32 Allowable bearing pressures
33 Modification factors applied to presumed bearing
    pressures
34 Simple foundations on sands and gravel
35 Simple foundations of cohesive soils
36 Heavy vibrations
37 Fill material
38 Piles
39 Protection of the foundation area
Section six. Design of falsework
40 General concepts
41 Design brief and basic approach
42 Forces applied to falsework
43 Analysis of falsework structure
44 Foundations to falsework
45 Additional considerations affecting certain design
    solutions
46 Design using scaffold tube and fittings
Section seven. Work on site
47 Introduction
48 Specific design instructions
49 General workmanship
50 Checking falsework
51 Application of loads to falsework
52 Dismantling
53 Maintenance, inspection and identification of
    materials
Section eight. Standard solutions
54 Introduction
55 Procedure for the use of standard designs
56 Criteria assumed in preparing the standard solutions
57 Limitations
58 Dimensional information
Appendices
A Permissible stresses and modulus of elasticity for
    grade 43A steel of BS 4360
B Properties of components in tube and coupler
    falsework
C Initial testing, quality control and inspection of
    falsework equipment
D Fatigue in Bailey Bridge sections
E Additional data on material properties
F Wave forces
G Site investigations for foundations for falsework
H Examples of design brief contents
J Forces from concrete on sloping soffits
K Design of steel beams at points of reaction or
    concentrated load
L Effective lengths of steel members in compression
M Selection of propping and repropping procedures for
    multi-storey buildings
N Bibliography
Tables
1 Grade stresses and moduli of elasticity for the wet
    condition
2 Equivalent strength classes for softwoods graded in
    accordance with BS 4978
3 Equivalent strength classes for North American
    softwoods graded in accordance with NLGA and NGRDL
4 Modification factor, K1, by which the geometrical
    properties of timber for the dry exposure condition
    should be multiplied to obtain values for the wet
    exposure condition
5 Modification factor, K3, for duration of load on
    falsework
6 Modification factor, K4, for bearing stresses
7 Maximum depth-to-breadth ratios
8 Permissible stresses and moduli of elasticity for
    general falsework applications
9 Commercial grade timber suitable to produce mainly
    class SC3 timber
10 Adjustable steel prop heights
11 Values of wind speed factor, S3 (for probability
    level 0.63)
12 Dynamic wind pressure, q, for various design wind
    speeds
13 Force coefficient, Cf, for falsework
14 Shielding factor, eta
15 Presumed allowable bearing pressure under vertical
    static loading
16 Field identification and description of soils
17 Ground water level modification factor
18 Minimum value of coefficient of static friction, mu
19 Dimensions for standard solutions for slab support
    arrangements
20 Dimensions for standard solutions for beam support
    arrangements
21 Permissible bending stress in compressive members,
    pbc, for beams
22 Permissible axial compressive stress, pc, on cross
    section
23 Maximum permissible axial stresses and loads in
    steel scaffold tubes
24 Safe working loads for individual couplers and
    fittings
25 Modulus of elasticity for concrete
26 Density of reinforced concrete
27 Density ranges for light-weight concretes
28 Masses of scaffolding materials
29 Masses and densities of men and materials
30 Masses of corrugated steel sheeting
31 Effective lengths and slenderness ratios of an
    unstiffened web acting as a column
32 Effective lengths of load-bearing stiffeners
33 Effective lengths of struts
34 Effective lengths for beams without intermediate
    restraints
35 Effective length for cantilever beams without
    intermediate lateral restraint
36 Two lifts of propping without repropping
37 Two lifts of propping plus one lift of repropping
Figures
1 Safe working loads for props
2 Controlled heaping of concrete
3 Basic wind speed, V
4 Ground surface conditions and height above ground
    factor for wind, S2
5 Wind forces on soffit: wind blowing parallel to
    secondary beams
6 Wind forces on soffit: wind blowing parallel to
    primary beams
7 Wind forces on edge formwork
8 Wind forces on combined beam and soffit formwork
9 Wind loading: combined formwork and falsework
10 Typical force combinations
11 Typical examples of stability of node points
12 Lateral restraint provided by friction
13 Base detail on slopes
14 Maximum deviation of load path
15 Eccentricity of loading
16 Effective lengths of tube and coupler scaffolding
17 Points of measurement of tolerances for purposely
    fabricated steelwork
18 Arrangement of members for construction of concrete
    slabs
19 Arrangement of members for typical beam support
20 I-beam dimensions
21 Non-breaking waves: section diagram
22 Figure deleted
23 Figure deleted
24 Figure deleted
25 Distribution of forces on sloping soffits
26 Stress dispersion: buckling
27 Stress dispersion: bearing
28 Positional restraint of steel members in axial
    compression
29 Girder restraint (1)
30 Girder restraint (2)

Gives recommendations for the methods of design, erection and use of temporary structures used to support permanent structures until such time as the latter become self-supporting.