In this session, the team behind 400 Summer Street in Boston will share how they built one of the first air-rights projects in nearly 40 years over an existing highway. This ambitious project involved using a five-story-deep Vierendeel truss, sloping columns, and lateral camber to prevent the 600,000 sq. ft. structure from overloading landing points installed over the highway tunnel during the Big Dig. You'll learn about the staged analysis and load-jacking methods leveraged to set the building out of plumb, counteract the lurching effects of asymmetric sloping columns, and manage the impacts on the facade panels cladding the building.
Learning Objectives
- Examine load shedding as a viable structural pathway to maximize opportunities in air-rights construction.
- Discuss when novel structural solutions may require nonstandard construction methods such as cambering and jacking.
- Explore how vertical loads cause horizontal movement (lurching) and methods for offsetting the effects of lurching.
- Review how atypical structural deformations affect movement joints between curtainwall facade panels.