Multi-Storey Steel Buildings

STEEL BUILDINGS IN EUROPE
Multi-Storey Steel Buildings
Part 4: Detailed Design

Multi-Storey Steel Buildings
Part 4: Detailed Design

Part 4: Detailed Design

4 – ii

Part 4: Detailed Design

FOREWORD
This publication is part four of the design guide, Multi-Storey Steel Buildings.
The 10 parts in the Multi-Storey Steel Buildings guide are:
Part 1:
Part 2:
Part 3:
Part 4:Part 5:
Part 6:
Part 7:
Part 8:
Part 9:
Part 10:

Architect’s guide
Concept design
Actions
Detailed design
Joint design
Fire Engineering
Model construction specification
Description of member resistance calculator
Description of simple connection resistance calculator
Guidance to developers of software for the design of composite beams

Multi-Storey Steel Buildings is one of twodesign guides. The second design guide is
Single-Storey Steel Buildings.
The two design guides have been produced in the framework of the European project
“Facilitating the market development for sections in industrial halls and low rise
buildings (SECHALO) RFS2-CT-2008-0030”.
The design guides have been prepared under the direction of Arcelor Mittal, Peiner
Träger and Corus. The technicalcontent has been prepared by CTICM and SCI,
collaborating as the Steel Alliance.

4 – iii

Part 4: Detailed Design

Contents
Page No
FOREWORD

III

SUMMARY

VI

1

INTRODUCTION
1.1 General
1.2 Scope of this document

1
1
1

2

BASIC CONCEPTS
2
2.1 Introduction
2
2.2 Simple construction
2
2.3 Sway and non-sway frames
3
2.4 Second order effects
4
2.5 Generaldesign procedure
7
2.6 Design of steel bracing systems to achieve cr  10 for all combinations
of actions
8
2.7 The effects of imperfections
10
2.8 Design summary
14

3

PRACTICAL GLOBAL ANALYSIS FOR ‘SIMPLE CONSTRUCTION’
3.1 Introduction
3.2 Actions and their combinations
3.3 Analysis for gravity loads
3.4 Allowance for second order effects
3.5 Design Summary

15
15
15
16
1819

4

SERVICEABILITY LIMIT STATE
4.1 General
4.2 Load combinations
4.3 Horizontal deflection limits
4.4 Vertical deflection limits
4.5 Precambering
4.6 Dynamic response
4.7 Design summary

20
20
20
20
21
23
23
24

5

ULTIMATE LIMIT STATE
5.1 Introduction
5.2 Floor systems
5.3 Columns
5.4 Vertical bracing
5.5 Horizontal bracing
5.6 Design summary

25
25
25
3742
44
46

6

ROBUSTNESS
6.1 Accidental design situations
6.2 Consequence classes
6.3 Design for the consequences of localised failure in multi-storey buildings
6.4 Key elements
6.5 Risk assessment
6.6 Design summary

47
47
48
49
53
54
54

REFERENCES

55

APPENDIX A
WORKED EXAMPLES
A.1 Worked Example – Simply supported, laterally unrestrained beam

56
57

4 – ivPart 4: Detailed Design
A.2
A.3
A.4
A.5
A.6

Worked Example – Simply supported beam with intermediate lateral
restraints
Worked Example – Simply supported, secondary composite beam
Worked Example – Simply supported, primary composite beam
Worked Example – Pinned column using non-slender H sections
Worked Example – Bolted connection of an angle brace in tension to a
gusset

4–v

6471
81
94
98

Part 4: Detailed Design

SUMMARY
This document is the fourth part of a publication covering all aspects of medium rise
multi-storey building design. The guide focuses on the detailed design of buildings that
use steel bracing or concrete cores to resist horizontal actions and provide horizontal
stability.
The objective of this document is to introduce the basic conceptsof multi-storey form
of construction, commonly referred to as ‘simple construction’ and to provide guidance
on practical aspects of building design.
It provides detailed guidance on how to design for stability, and goes on to give advice
on the global analysis of multi-storey buildings.
It also covers the serviceability and ultimate limit state requirements of EN 1993 and
EN 1994 and...