This week we’re going underground to explore geotechnical and seismic engineering. We’ll look at how structures connect to the ground and transmit loads through their foundations, and how those foundations need to provide a high bearing capacity. We’ll see how properties of the soil, like shear strength, affect bearing capacity. We’ll also consider happens when the ground experiences stress from seismic activity and how seismic engineers work to counteract those effects. Crash Course Engineering is produced in association with PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Subscribe to Hot Mess: https://www.youtube.com/channel/UCsaEBhRsI6tmmz12fkSEYdw *** RESOURCES: https://www.thebalancesmb.com/leaning-tower-pisa-construction-844359 http://environment.uwe.ac.uk/geocal/foundations/founbear.htm http://www.geotechnicalinfo.com/bearing_capacity_technical_guidance.html http://civil.utm.my/azril/files/2016/05/2014-August-Chapter-4-Soil-Shear-strength-Revised.pdf http://www4.hcmut.edu.vn/~cnan/Principles%20of%20geotechnical%20engineering%20(Fifth%20Edition,%20Das)/311-363.PDF https://icce-ojs-tamu.tdl.org/icce/index.php/icce/article/viewFile/2059/1731 https://www.soil-net.com/legacy/schools/what_is_soil1.htm https://www.ramjack.com/houston/about-ram-jack/blog/2015/september/the-foundation-of-the-leaning-tower-of-pisa/ https://leaningtowerpisa.com/facts/how/how-pisa-leaning-tower-was-stabilized *** Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Eric Prestemon, Sam Buck, Mark Brouwer, Bob Doye, Jennifer Killen, Naman Goel, Nathan Catchings, Brandon Westmoreland, dorsey, Indika Siriwardena, Kenneth F Penttinen, Trevin Beattie, Erika & Alexa Saur, Glenn Elliott, Justin Zingsheim, Jessica Wode, Tom Trval, Jason Saslow, Nathan Taylor, Brian Thomas Gossett, Khaled El Shalakany, SR Foxley, Sam Ferguson, Yasenia Cruz, Eric Koslow, Caleb Weeks, Tim Curwick, D.A. Noe, Shawn Arnold, Malcolm Callis, William McGraw, Andrei Krishkevich, Rachel Bright, Jirat, Ian Dundore -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids