I learned today that the #MTO (Ministry of Transportation of Ontario) switched to 500 MPa yield strength steel for their standard #reinforcing bars in 2021.
Imagine, that happened three years, and I was unaware until now.
Selkirk Trestle Bridge. Shot from waters below.
It's a well used bicycle & pedestrian bridge that spans across the #GorgeWaterway - from #VicWest to #BurnsideGorge.
Miami to Key West.
The Overseas Highway was originally Built as a railway and opened in 1912. this is now a highway for vehicles.
113 miles across 44 islands and 42 bridges.
Quite an engineering achievement.