CISC Guide for Specifying Architecturally Exposed Structural Steel

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CISC

Guide for Specifying

Architecturally ExposedStructural Steel

by Terri Meyer Boake


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CISC


Architecturally ExposedStructural Steel


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Copyright © 2012Canadian Instute of Steel Construcon

All rights reserved.This book or any part thereof must not be reproduced

without wrien permission from the publisher.

Second EdionFirst Prinng March 2012

ISBN 978-0-88811-160-9

Front cover images courtesy Terri Meyer Boake


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CISC


Architecturally Exposed

Structural Steel

Terri Meyer Boake, B.E.S., B.Arch., M.Arch., LEED AP

School of Architecture

University of WaterlooWaterloo, Ontario

Canadian Institute of Steel Construction

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Table of Contents

TABLE OF CONTENTS

Foreword 6

1 The Challenge 7 What Is AESS? 7 Purpose of the Guide 7 Evoluon of Architecturally Exposed Structural Steel 7 Development of the New CISC AESS Documents 8 Primary Factors of Inuence That Dene AESS 8 Form, Fit and Finish 9

The Matrix 10

2 Categories 12 The Categories Approach 12 Standard Structural Steel 12 AESS 1 - Basic Elements 13 AESS 2 - Feature Elements (view distance > 6 metres) 14 AESS 3 - Feature Elements (view distance 6 metres) 15

AESS 4 - Showcase Elements 16 AESS C - Custom Elements 17 Mixed Categories 17

3 Characteriscs 18 Characteriscs of the Matrix 18 AESS 1 - Characteriscs 1.1 to 1.5 18 AESS 2 - Characteriscs 2.1 to 2.4 19 AESS 3 - Characteriscs 3.1 to 3.6 20

AESS 4 - Characteriscs 4.1 to 4.4 22 AESS C 22 Working Outside of Canada 23

AcknowledgementsThis publicaon would not have been possible without the input of many dedicatedpeople in the steel industry. The CISC AESS Commiee members from across Canadaput many long hours into sharing their knowledge in order to help create a useful toolfor designing, specifying or creang Architecturally Exposed Structural Steel.

Parcular thanks go to Sylvie Boulanger for her assistance in working through thedetails of this publicaon, and to Walter Koppelaar for his encouragement and sharinghis knowledge of the industry and its inner workings.

It is sincerely hoped that this guide will assist in leveraging the posion and ease of useof Architecturally Exposed Structural Steel in the Canadian construcon industry.

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7 Erecon Consideraons 38 Handling the Steel 38 Transportaon Issues 38 Sequencing of Lis 38 Site Constraints 38 Care in Handling 38 Erecon Issues 39 Combining Steel with Timber 39 Combining Steel with Glass 40

8 Special Acknowledgments 42

9 References and Image Credits 43

Appendices

Appendix 1 - CISC Code of Standard Pracce 44 Appendix 2 - Sample AESS Specicaon 46

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4 Coangs and Finishes 24 General Issues 24 Details 25 Surface Preparaon 25 Paint Systems 25 Shop Versus Site Painng 26 Primers 26 Intumescent Coangs 26 Cemenous/Fibrous Fire Protecon 27 Galvanizing 27 Metalizing 28 Weathering Steel 29 Stainless Steel 30

5 Connecons 30 Detailing Requirements for AESS Connecons 30

General Issues 30 Connecon Mock-Ups 31 Which Type of Connecon Should I Choose? 31 Bolted Connecons 32 Welded Connecons 32 Tubular Steel 33 Cast Connecons 34

6 Curves and Cuts 35 Designing for Complex Curves and Cuts 35 Bending 35 Ellipcal Tubes 36 Specialized Equipment 36 Shearing 36 CNC Cu ng 36 Plasma Cu ng 36 Torch or Flame Cu ng 37 Hole Punching and Drilling 37

Disclaimer:It is not the intenon of the CISC AESS Commiee that the projects and details included in thisGuide should be replicated or necessarily represent “best pracces”. They are included only toallow for a beer understanding of the visual intenons of the pracces and procedures outlinedin the Guide and related specicaon documents, with the understanding that “a picture mightbe worth a thousand words”.

Image credits:Unless otherwise noted, all images in this book were taken by Terri Meyer Boake. Images are notto be reproduced without wrien authorizaon of the author. All images are credited at the endof the document using the numbered photo scheme.


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CISC AESS Guide – 1 The Challenge - 10

THE CISC CATEGORY MATRIX FOR SPECIFYING ARCHITECTURALLY EXPOSED STRUCTURAL STEEL (AESS)

AESS 1

AESS 4

AESS 3

AESS 2

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Table 1 - AESS Category Matrix

Category AESS C AESS 4 AESS 3

Custom Elements Showcase Elements Feature Elements

IdCharacteris cs

Viewed at a Distance 6

m

1.1 Surface preparaon to SSPC-SP 6

1.2 Sharp edges ground smooth

1.3 Connuous weld appearance

1.4 Standard structural bolts

1.5 Wel d spaers removed

2.1 Visual Samples oponal oponal

2.2 One-half standard fabricaon tolerances

2.3 Fabri caon marks not apparent

2.4 Welds uniform and smooth

3.1 Mill marks removed

3.2 Bu and pl ug welds ground smooth and lled

3.3 HSS weld seam oriented for reduced visi bili ty

3.4 Cross seconal abung surface al igned

3.5 Joint gap tolerances minimized

3.6 All welded connecons oponal oponal

4.1 HSS seam not apparent

4.2 Welds contoured and blended

4.3 Surfaces ll ed and sanded

4.4 Weld show-through minimized

C.1

C.2

C.3

C.4

C.5

Sample Use:Elements with special

requirements

Showcase or dominant

elements

Airports, shopping

centres, hospitals,

lobbies

Es mated Cost Premium: Low to High High Moderate

(20-250%) (100-250%) (60-150%)

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Viewed at a Distance 6 m


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Canadian Institute of Steel Construction

CISC Guide for Specifying Architecturally Exposed Structural Steel

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