Does Rebar Rust?

From Practical Engineering. Check out the first two videos on concrete if you haven’t seen them already: – What is Concrete? (https://www.youtube.com/watch?v=UOHURuAf5iY) – Why Concrete Needs Reinforcement (https://www.youtube.com/watch?v=cZINeaDjisY) While steel reinforcement solves one of concrete’s greatest limitations, it creates an entirely new problem: Corrosion of embedded steel rebar is the most common form of concrete…

Why Bridges Move…

From Practical Engineering. …and other musings on thermal movement of large civil works. This video is sponsored by Blue Apron. First 100 people to sign up will get $40 off their first two weeks of Blue Apron orders. Click here: http://cook.ba/2HO67T5 Most people have a certain intuition about thermal expansion, but you may not have…

What is Water Hammer?

From Practical Engineering. First 100 people to sign up will get $30 off their first Blue Apron order here: http://cook.ba/2hkRvlY. This video is sponsored by Blue Apron. Hydraulic transients (also known as water hammer) can seem innocuous in a residential setting, but these spikes in pressure can cause major damage to large pipelines and industrial…

How to Super-Size the Eclipse – Sun Funnel

From Practical Engineering. If you’ve got a telescope, give the crowd a show next week. Make the eclipse bigger! Eclipse glasses are okay, but the sun is only as big as your thumbnail at arms length. That’s not very big. I need something to impress some kindergartners! Hopefully the sun funnel can do it. Plans:…

How does land surveying work?

From Practical Engineering. A primer on one of the most important companions to civil engineering: land surveyors. First 100 people to sign up will get three meals off their Blue Apron order free! Click here: http://cook.ba/2tNJ2b3 This video is sponsored by Blue Apron. Conventional measurement tools like a tape measure and protractor don’t work for…