the.com/girder
the unsung skeleton holding up every skyline you've ever bragged about visiting
shapeThe I-beam profile maximizes strength per pound of steel
etymologyFrom Old English meaning to gird or encircle
rivetersEarly skyscrapers were assembled by men tossing hot rivets midair
forth bridgeScotland's 1890 girders used 54,000 tons of steel
flexGood girders bend slightly under load by design