Meet the Y Columns Holding Up Our Roof
September 28, 2022

This is a Y Column.

Quick update: This article was written in 2022. The new PDX is here! Want to meet it?

From July to mid-August, while most of us were sleeping, PDX's construction partners installed 26 Y columns around the site of the new Main Terminal. Another eight will be erected next year. These 34 columns, set in a 100-foot-by-100-foot grid, will soon hold up the new terminal's nine-acre wooden roof.

Each of these steel columns weighs between 80,000 and 90,000 pounds—and that’s before we filled them with solid concrete. If you think that's heavy, wrap your brain around how much weight they'll hold—18 million pounds in total, or an average of 264 tons per column.

rendering of new terminal area

According to Randy McGee, a principal architect at ZGF who helped design the Y columns, their distinctive shape was based on the idea of a walk in the forest. They quietly create a sense of the trees overhead, he says, "the way the branches go up and hold the tree cover, gracefully supporting the canopy."

The columns are each 55 feet tall, with a 20-foot span. Just how big is that?

size comparison of Y column larger than Portland sign Portlandia statue and Douglas Fir tree

The Y columns are just about as local as all you Portland natives who boast that you only feel comfortable on overcast days. The steel was rolled at Evraz in North Portland. Then W&W Afco Steel and Thompson Metal Fab fabricated the columns across the river in Vancouver. Brian Burk, an operations impact coordinator at the airport, says it took a series of midnight drives across the Highway 205 bridge, escorted by sheriffs, to bring the columns to PDX.

If you want to peek at the Y columns right now, Brian recommends you make your way to gates D6 and D8 on Concourse D, or join the dog lovers looking out the windows in the pet relief area on Concourse C.

view columns from concourses D and C

By the time the main terminal opens in 2024, however, these engineering marvels may fade into the background. When you look up, you’ll be more likely to notice the latticed-wood ceiling and circular skylights, which seem to hover between the columns’ outstretched arms. The columns wear their immense strength lightly—just like the trees in our Pacific Northwest forests.