Design

Modeling and Understanding, Part 6 and the End For Now

Part 1, part 2, part 3, part 4, and part 5 give the context. Engineers create models. So do architects, economists, sociologists, physicists, biologists, and sculptors, among others. What makes our models special? Not every single structural engineering problem is life and death, but a large percentage of them carry the possibility of catastrophic failure if dealt with improperly. …

Modeling and Understanding, Part 6 and the End For Now Read More »

Modeling and Understanding, Part 5

Part 1, part 2, part 3, and part 4 give the context. Strength and stiffness are both easy to understand in a qualitative way, as how much load something can hold and how much it will move when it holds the load, but non-engineers tend to underestimate the amount of time engineers spend addressing stiffness issues. I find …

Modeling and Understanding, Part 5 Read More »

The Nevius Street Bridge – Member Design

See here for part 1 of this dive into archaic bridge design. In a pure truss, all of the members are loaded only in axial tension or axial compression. No bridge is composed only of pure trusses – the deck beams that support the roadbed from the side trusses are loaded in bending – but …

The Nevius Street Bridge – Member Design Read More »

A Code Change Made Visible

The picture above is a storefront on the Upper West Side. The building in question was constructed in 1899 and is seven stories tall, which make it quite likely that the structure consists of masonry bearing walls and wood-joist floors. The remarkable thing about the picture is that the big riveted built-up plate girder supporting …

A Code Change Made Visible Read More »

Scroll to Top