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SCI CONNECT – December 2020

I would imagine that most of you were like me when reading news articles late last year. A very bizarre situation was developing in China, with cities locked down. But we're not like China, and I didn't foresee us being directly affected. At a management meeting in our Board Room in mid-March we were talking about 'if' we need to do something, rather than 'when'. Thankfully, despite working in conditions none of us would ever have imagined, and despite world events that will affect many of us for the rest of our lives, the sector (and SCI) seems to be doing OK at the moment. We are really quite busy, have recently recruited a graduate engineer, and know from our interactions with our members and clients that we are not alone in being in that 'unexpectedly good place'.

A few years ago I started suggesting that I was sure three things would happen in our sector, I just didn't have any idea how long it would take. We would start using less material (e.g. through more sophisticated approaches to design than the traditional either pinned or fixed approach to joints, and revised ways of recognising cost). We would use higher strength steels so we need less of them. We would start building structures that can be deconstructed and reused.

In 2020 we have seen considerable interest from various parties in structures that can be deconstructed. Our publication P428 gives ideas on how this can be achieved with composite solutions, identifying indicative products/detailing and how design methods should evolve. It is based on research we have been doing over the past five years or so. We are also about to launch a publication (P432) on the use of high strength steel, as discussed in a separate article in this newsletter.

The world of light gauge steel seems to be remaining buoyant, which is good news given how fragile smaller companies can be in recession. A long time in the making, we will be launching P424 in 2021, covering the behaviour of light gauge elements in fire and including a method for extrapolating results from loaded fire tests.

So not a year I would choose to repeat, but we seem to have ridden the storm (so far). I hope it's the same for you, and wish you a very Merry Christmas and more predictable New Year.


Merry Christmas & A Happy New Year from Graham & all at SCI

Contents
Featured Article
NEW Publication
High-strength steel: Strong, lightweight & cost effective (P432)
NEW Publication
Fire Resistance of Steel Sections Galvanized to EN ISO 1461 (P429)
Members Advisory Desk
SCI Advisory Q&A
SCI Webinars, Courses
& Events
Publications
 
SCI Courses
Steel Connection Design Composite Design 2
- Webinar

12 Jan
Steel Connection Design Light Gauge Steel Design Course - 3 sessions - Webinar
23 Feb, 25 Feb and 2 Mar
Steel Connection Design Designing in Stainless Steel - Webinar
16 Mar
View all courses
High-strength steel: Strong, lightweight & cost effective (P432)

True or false:

  1. It's not possible to buy structural sections stronger than S355
  2. There's no point using high strength steel (HSS) for beams since serviceability or dynamics always govern design
  3. HSS become brittle when welded

The answers to all these questions is FALSE! You will find the answers to these questions and much more in SCI's latest publication P432 'High strength steel design and execution guide'.

The use of HSS can enable substantial savings in structural weight and material costs. The reduction in weight leads to a cost saving in the foundations, welding, fabrication, transportation and erection. Significant reductions in carbon dioxide emissions are also possible. As a result of these advantages, HSS are being used increasingly in a range of applications in construction, particularly for heavy columns, transfer beams, trusses and bridge girders. And it is likely that their use will increase, especially as the importance of minimizing carbon dioxide emissions grows.

SCI's new publication leads designers through the stages of specification, design and execution for structures made of steels with strengths from S420 up to S700, in accordance with European product, design and execution standards. Topics such as product availability, fracture toughness and fatigue resistance are included. The design of steel structures and composite steel-concrete members is covered, as well as the design of hybrid members where HSS is used for the flange and a lower strength steel for the web.

Practical guidance is given on when and how the benefits of HSS can be exploited in design and worked examples go step-by-step through the design process.

This new publication is available as a free download from the
SCI Shop
or from Steelbiz.

Light Steel Frame Association roundtable on the sustainable use of steel
Fire Resistance of Steel Sections Galvanized to EN ISO 1461 (P429)

Galvanized steel has been shown to have a lower surface emissivity than non-galvanized steel at temperatures below approximately 500°C. The temperature of a galvanized steel section will therefore increase at a slower rate than that of an equivalent non-galvanized section, leading to increased fire resistance for fire exposure periods of up to around 30 minutes.

This new design guide provides tables to calculate fire resistances and maximum fire exposure periods for galvanized steel beams, composite beams, columns, and plates in tension, according to the Eurocodes and the UK and Irish National Annexes. Design tables in accordance with BS 5950 are also provided.

This guide is based on calculations and analysis prepared by Professor Yong Wang (The University of Manchester). SCI is grateful to Iqbal Johal (Galvanizers Association) and Murray Cook (European General Galvanizers Association) for their assistance in preparing the information on galvanizing and collating the results of recent research on the fire resistance of galvanized steel that has been used in this guidance.

This new publication is available as a free download from the
SCI Shop
or from Steelbiz

Fire Resistance of Steel Sections Galvanized to EN ISO 1461 (P429)
Members Advisory Desk Service email alerts.

The new Advisory Desk service emails sent this month included;

Advisory Desk Note - AD 431
Column web panel strengthening

Advisory Desk Note - AD 456
Impact forces on car parks

If you are an SCI Sole Trader or Corporate Member and not receiving these emails alerts go to the SCI Information Portal and in your Profile click on notifications/alerts and select the notifications you require.

All the Advisory Desk Notes and Questions and Answers together with other technical resources are all available at all times on the SCI Information Portal.

SCI Member Logo
SCI Advisory Questions and Answers

For SCI Sole Trader and Corporate members, SCI offers support through our Advisory Desk Service. For questions asked which we feel are pertinent to the wider member audience we publish anonymously the questions and answers.

Where some questions relate to SCI Publications we publish the question and answers in Connect.

This month our published question is about; Partial factors for crane actions

Question: What partial factor should be used for the variable action due to crane loads acting on a structure?

Please see the answer to this Advisory Question/Answer - Ref No AD_QA_7153-20 and all Advisory questions on the SCI Information Portal.

The Advisory Desk Service is for SCI Corporate and Sole Trader Members advisory@steel-sci.com | +44 (0) 1344 636525

SCI Member Logo
SCI Courses, Webinars and Events

SCI Online Event

Structural Design of High Strength Steels

19 January 2021:
Introduction to the use of HSS in structures

26 January 2021:
Design of HSS - plastic design

2 February 2021:
Design of HSS - member stability and dynamic response

9 February 2021:
Weight, cost and carbon savings with HSS

Time: 12:00-13:15

This series of four webinars will inform engineers how to design high strength steels (HSS) in accordance with current European practice, as well as cover brand new developments in design guidance arising from the STROBE project. Each delegate will receive a PDF copy of the new SCI Publication P432 'High Strength Steel Design and Execution Guide'.

The webinars are from 12:00 to 13:15. Each webinar will include case studies and design examples.

This event is FREE for anyone to attend

Register here to attend.


High Strength Steel Design

SCI Online Training Courses

Light Gauge Steel Design Course - 3 sessions:

This online course is delivered in 3 sessions
Part 1 - 23 February
Part 2 - 25 February
Part 3 - 2 March

Time: 10:00-12:00

This on-line course is delivered in 3 sessions and will introduce the uses and applications of light gauge steel in construction, before explaining in detail the methods employed by Eurocode 3 for designing light gauge steel members in bending and compression and calculation of section properties. Specific design issues related to the different uses of light gauge steel are addressed.

For light steel framing the issues covered include: frame stability, bracing, designing for robustness, connection design, frame anchorage and serviceability conditions.

For industrial building applications the issues covered include: specification with load tables, rafter and column restraint and load reversal (uplift) conditions.

Other specific topics that are covered include: fire resistance, acoustic performance, NHBC Standards Chapter 6.10 and durability.

The subjects are illustrated through a series of example calculations throughout the course.

Member Rate - £250.00
SCI Non-Member - £330.00

For more information and to book this course click here.


Light Gauge Steel Design Course

Next SCI Member webinar is;

Composite Design. Part 2
12 January 2021
Time: 12:30-13:30

Composite Design 2. Having established the benefits and general principles of composite construction in the first webinar, the second will focus on latest developments and thinking.

Register here to view this webinar


SCI Logo
SCI Publications

Our bookshop is once again open. For any hard copies of SCI Publications visit the SCI WebShop.

Design Manual for Structural Stainless Steel 4th Edition (P413)

Design Manual for Structural Stainless Steel 4th Edition (P413) This Design Manual gives design rules for austenitic, duplex and ferritic stainless steels. The rules are aligned to the 2015 amendment of the Eurocode for structural stainless steel, EN 1993-1-4. Guidance on grade selection, durability and fabrication is also provided. Fifteen design examples are included which illustrate the application of the design rules.

Fire Resistance of Steel Sections Galvanized to EN ISO 1461 (P429)

Fire Resistance of Steel Sections Galvanized to EN ISO 1461 (P429) This new design guide provides tables to calculate fire resistances and maximum fire exposure periods for galvanized steel beams, composite beams, columns, and plates in tension, according to the Eurocodes and the UK and Irish National Annexes. Design tables in accordance with BS 5950 are also provided.

High Strength Steel Design and Execution Guide (P432)

High Strength Steel Design and Execution Guide (P432) This new guidance provides advice for designers, fabricators, product manufacturers and clients on the selection, design and execution of high strength steel structures. It provides comprehensive guidance on when and how the benefits of steels with yield strengths from 420 to 700 MPa can be exploited in practical design situations in the construction industry.

FREE DOWNLOAD

FREE DOWNLOAD

FREE DOWNLOAD

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