“The Fern Hollow Bridge collapsed from extensive corrosion ... s so-called “fracture critical members,” defined as steel bridge components whose failure could cause a partial or full bridge ...

This idea isn’t new—it goes back thousands of years. The Romans and Mesopotamians built arches that used compression to ...

TriMet started looking into other options that aren’t leasing the top deck of the Steel Bridge from Union Pacific. One idea was building a tunnel from the Lloyd center to Goose Hollow.

Architect Masoud Akbarzadeh of the Weitzman School of Design at the Univeisity of Pennsylvania led a team of engineers and ...