All posts by Matthew Cornell

Matt Cornell is a structural engineer with 20 years experience in residential structural engineering. He lives in Samford Valley near Brisbane.

Hey building industry lets get metric

So if you’re in the building industry in Australia you’ve probably noticed by now that the sizing and spacing of structural members isn’t exactly metric. I mean, we’re working in millimetres and all but have you noticed we still bow to imperial measurements in nearly all structural framing?

Here is how pervasive the imperial system is in our construction industry:

  • 75mm x 50mm studs are really 3 inch x 2 inch studs in imperial
  • (70mm x 45mm studs are just the seasoned timber equivalent of 75 x 50)
  • Roof frames are at 900mm (3 feet) or 600mm (2 feet) centres
  • Studs are at 450mm (1.5 feet) or 600mm (2 feet) centres
  • Residential wall heights are commonly 2.4m (8 feet), 2.7m (9 feet) or 3.0m (10 feet)
  • Windows are 900mm (3 feet), 1200mm (4 feet), 1500mm (5 feet) etc wide

The list goes on.

Why are we hanging on to these old imperial dimensions when we turned metric many, many years ago? Wouldn’t it be easier for set out, planning and ordering to be working in metric?

Our materials are made better and are stronger and more consistently than ‘the old days’ when these systems were first put in place.

  • Why can’t studs be placed at 500mm centres instead of 450mm centres?
  • Why don’t we have trusses at 1000mm (1 metre) centres?
  • Why don’t we have wall heights at 2.5 metres and 3.0m standard?
  • Why don’t windows come in 500mm width increments to suit metric stud centres?

So I’m calling out to industry, to suppliers, to product technical advisors and to other structural engineers. Let’s make the move to metric in the construction industry. It doesn’t have to be overnight, but when we learn to work in metric numbers, in easy multiples of 10, 50 and 100 I think we’ll make it easier for ourselves, use our modern materials more efficiently and finally close the door on outdated imperial standards.

How does a structural engineer check engineering drawings

Join Matt Cornell as he checks the drawings for a single storey concrete masonry (bessa block) home to be built in a cyclone region. He goes through the process of checking a set of structural engineering drawings with some tips for checking and good construction.

Today we’re going to go through the process that I normally
follow when I’m checking a set of engineering plans.

So a job comes into – a set of plans come into the office and they’ve asked us to do the engineering.

One of my engineers has done up some engineering drawings.

Here you can see the engineering, the AutoCAD file here. They’ve set up a form 15 ready for me to fill in. I’m doing the checking.

So a lot of the works already been done. There’s a checking folder already as you can see, so first thing I’m going to do is is check to see what the client has actually asked for.

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Structural Engineering in the News 29 June 2019

Every week Google sends me a Google Alert for the search term “structural engineer” with the latest news articles featuring our world of structural engineering.

Let’s go through the articles together and see what’s happening in our local world of structural engineering.

Links are below the video.

Transcript

G’day. This is Matt Cornell from Cornell Engineers and Google Alerts for the term search term “Structural Engineer”. This is
the Google Alert dated 29th of June 2019.

Continue reading Structural Engineering in the News 29 June 2019

Structural Engineering in the News: 15 June 2019

Google sends me a weekly alert for the term structural engineer. Here’s my take on the term “structural engineer” in the news this week.

I have to say, I’m not super-proud of the number of collapses, evacuations and problems relating to structural engineering this week.

Not a very good sign.

One or two nicer articles gave us some light but in general, I think the message this week is quality structural engineering might cost more up front but it really is worth it.

Nothing against younger engineers coming through the ranks but it has to be under the direct supervision of an experienced, qualified engineer and the it has to be the same line of work as the supervising engineer has experience in .

There is absolutely no use in being supervised by a civil engineer if you are doing structural engineering unless that civil engineer has already specialised in structural engineering.

We’re hoping for better news next week.

Have a great week. Matt Cornell

These are the news articles Alerts that Google sent me this week.

https://www.readingeagle.com/business-weekly/article/structural-engineering-is-foundation-we-build-on

https://www.smh.com.au/sydney-news/mascot-residents-evacuated-after-identifiable-movements-in-the-basement-area-20190614-p51xwt.html

https://abcnews.go.com/US/engineers-failed-recognize-danger-fiu-bridge-inspection-hours/story?id=63657158

https://www.abc.net.au/news/2019-06-15/mascot-towers-sydney-evacuation-what-we-know-about-cracks/11213664

https://thewest.com.au/news/perth/no-concrete-answer-for-perth-cbd-bridge-collapse-ng-b881227374z

https://www.bbc.com/news/uk-england-merseyside-48554318

https://www.stuff.co.nz/national/113453883/nz-transport-agency-evacuates-quakeprone-palmerston-north-building

https://www.dundalkdemocrat.ie/news/home/423564/job-alert-civil-and-structural-engineering-staff-at-mcardle-doyle-in-dundalk.html

https://www.constructiondive.com/news/osha-places-blame-for-fiu-bridge-collapse-on-engineer-contractors/556798/

Waffle Slab Inspection With Engineer’s Commentry

G’day. This is Matt Cornell from Cornell Engineers. This is a waffle slab inspection that we did a little while ago and I wanted to go through and put some words to it to let you know what we’re looking at during this inspection.

So here we go coming in from the front I’ll just pause it there and explain some of these things.

The white things that you can see are the polystyrene waffle pods they come in about a metre by metre squares they’re sort of semi- hollow underneath. They’re not solid polystyrene but on top they’re solid. The space between waffle pods is about 110mm wide.

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