2024 Top 400 Sourcebook: Pittsburgh Bridge's Planned Slide Show

Construction is underway to replace Commercial Street Bridge, an 861-ft-long open spandrel concrete arch structure that rises up to 85 ft above Nine Mile Run and Frick Park in Pittsburgh.

Vox - How insulated glass changed architecture, 03022022

Thomas Leslie explains how insulated glass shaped the look of the 20th century. Big but poorly insulated glass windows went out of fashion as electricity allowed for the production of artificial light. Builders needed a new way to install windows that let in natural light, but also controlled heat. Insulated glass was that solution. The video shows how the invention of a branded glass, Thermopane, and its immediate competitors, led to the landscape we recognise today