BS 5950-5:1998

Committees responsible
Foreword
Section 1. General
1.1 Introduction
     1.1.1 Aims of economical structural design
     1.1.2 Overall stability
     1.1.3 Accuracy of calculation
1.2 Scope
1.3 Normative references
1.4 Terms and definitions
1.5 Symbols
Section 2. Limit state design
2.1 General principles and design methods
     2.1.1 General
     2.1.2 Methods of design
2.2 Loading
     2.2.1 General
     2.2.2 Dead, imposed and wind loading
     2.2.3 Accidental loading
     2.2.4 Temperature effects
2.3 Ultimate limit states
     2.3.1 Limit states of strength
     2.3.2 Stability limit state
     2.3.3 Fatigue
     2.3.4 Brittle fracture
     2.3.5 Structural integrity
2.4 Serviceability limit states
     2.4.1 Serviceability loads
     2.4.2 Deflection
2.5 Durability
Section 3. Properties of materials and section properties
3.1 Range of thicknesses
3.2 Design thickness
3.3 Properties of materials
     3.3.1 General
     3.3.2 Strength of steel
     3.3.3 Other properties of steel
3.4 Effects of cold forming
3.5 Calculation of section properties
     3.5.1 Method of calculation
     3.5.2 Cross-section properties
     3.5.3 Net section properties for members in bending or
           compression
     3.5.4 Section properties for members in tension
Section 4. Local buckling
4.1 General
4.2 Maximum width to thickness ratios
4.3 Basic effective width
4.4 Effective widths of plates with both edges supported
     (stiffened elements)
     4.4.1 Elements under uniform compression
     4.4.2 Elements under stress gradient
4.5 Effective widths of plates with one edge supported
     (unstiffened elements)
     4.5.1 Elements under uniform compression
     4.5.2 Elements under combined bending and axial load
4.6 Edge stiffeners
4.7 Intermediate stiffeners
     4.7.1 Minimum stiffener rigidity
     4.7.2 Reduced sub-element properties
     4.7.3 Limitations in the case of multiple-intermediate
           stiffeners
Section 5. Design of members subject to bending
5.1 General
5.2 Laterally stable beams
     5.2.1 General
     5.2.2 Determination of moment capacity
     5.2.3 Utilization of plastic bending capacity
5.3 Web crushing
5.4 Shear in webs
     5.4.1 General
     5.4.2 Maximum shear stress
     5.4.3 Average shear stress
5.5 Combined effects
     5.5.1 Combined bending and web crushing
     5.5.2 Combined bending and shear
5.6 Lateral buckling
     5.6.1 General
     5.6.2 Buckling resistance moment
     5.6.3 Effective lengths
     5.6.4 Destabilizing loads
5.7 Deflections
5.8 Flange curling
5.9 Effects of torsion
     5.9.1 General
     5.9.2 Direct stresses due to combined bending and torsion
     5.9.3 Angle of twist
Section 6. Members in compression
6.1 General
     6.1.1 Introduction
     6.1.2 Effective cross-sectional area
     6.1.3 Use of enhanced K values
6.2 Flexural buckling
     6.2.1 Effective lengths
     6.2.2 Maximum slenderness
     6.2.3 Ultimate loads
     6.2.4 Singly symmetrical sections
     6.2.5 Compound sections composed of channels back to back
6.3 Torsional flexural buckling
     6.3.1 General
     6.3.2 Sections with at least one axis of symmetry (x axis)
     6.3.3 Non-symmetrical sections
6.4 Combined bending and compression
     6.4.1 General
     6.4.2 Local capacity check
     6.4.3 Overall buckling check
Section 7. Members in tension
7.1 General
7.2 Tensile capacity
     7.2.1 General
     7.2.2 Single angles, plain channels and T-sections
     7.2.3 Double angles, plain channels and T-sections
7.3 Combined bending and tension
Section 8. Connections
8.1 General recommendations
     8.1.1 General
     8.1.2 Intersections
     8.1.3 Joints in simple construction
     8.1.4 Joints in rigid construction
     8.1.5 Joints in semi-rigid construction
     8.1.6 Strength of individual fasteners
     8.1.7 Forces in individual fasteners
     8.1.8 Joints subject to vibration and/or load reversal
     8.1.9 Splices
8.2 Bolted connections
     8.2.1 General
     8.2.2 Bolt pitch and edge distances
     8.2.3 Effective diameter and areas of bolts
     8.2.4 Shear capacity of bolt
     8.2.5 Bearing capacity
     8.2.6 Tensile stress on net section
     8.2.7 Bolts subject to tension
     8.2.8 Combined shear and tension
     8.2.9 Moment capacity of bolt groups
8.3 Friction grip bolts
8.4 Weld detail and design
     8.4.1 General
     8.4.2 Details of fillet welds
     8.4.3 Design of fillet welds
     8.4.4 Partial penetration butt welds
     8.4.5 Design of butt welds
     8.4.6 Single flare V welds
     8.4.7 Arc spot welds
     8.4.8 Elongated arc spot welds
8.5 Resistance spot welds
     8.5.1 General
     8.5.2 Details of resistance spot welds
     8.5.3 Design of resistance spot welds
8.6 Maximum pitch for connections in sections
     8.6.1 Maximum pitch: compression members
     8.6.2 Maximum pitch: connection of two channels to form
           an I-section
8.7 Screws, blind rivets and powder actuated fasteners
8.8 Holding-down bolts
Section 9. Simplified rules for commonly used members
9.1 General
9.2 Z purlins with lips
     9.2.1 General
     9.2.2 Design rules
     9.2.3 Wind uplift
9.3 Z sheeting rails with lips
     9.3.1 General
     9.3.2 Vertical supports
     9.3.3 Design rules
9.4 Lattice joists
     9.4.1 General
     9.4.2 Design rules and limitations
     9.4.3 Lateral support
Section 10. Loading Tests
10.1 General
     10.1.1 Purpose of testing
     10.1.2 Types of loading tests
     10.1.3 Quality control
10.2 Test conditions
     10.2.1 General
     10.2.2 Measurements
     10.2.3 Loading
10.3 Test procedures
     10.3.1 Preliminary loading
     10.3.2 Load increments
     10.3.3 Coupon tests
     10.3.4 Test report
10.4 Relative strength coefficient
     10.4.1 General
     10.4.2 For predetermining a test load
     10.4.3 For calibrating the results of a failure test
10.5 Component tests
     10.5.1 General
     10.5.2 Full cross-section tension test
     10.5.3 Full cross-section compression tests
     10.5.4 Full cross-section bending tests
     10.5.5 Testing of connections with fasteners
10.6 Proof test
     10.6.1 General
     10.6.2 Proof test load
     10.6.3 Proof test criteria
10.7 Strength test
     10.7.1 General
     10.7.2 Strength test load
     10.7.3 Criteria
10.8 Failure test
     10.8.1 General
     10.8.2 Failure criteria
     10.8.3 Evaluation of test results
10.9 Load tables
     10.9.1 General
     10.9.2 Tables based completely on testing
     10.9.3 Tables based on combined testing and analysis
Annex A (normative) Screws, blind rivets and powder actuated
                      fasteners
Annex B (informative) K factors for some bending and
                      compression elements
Annex C (informative) alpha factors for members in compression
Annex D (informative) Warping constants for some common sections
Bibliography

Provides recommendations for designing structural steelwork in buildings and allied structures by means of cold formed sections. Mainly intended for steel sections of thickness not in excess of 8 mm.