Photo of the Day: Glaziers from MTH Industries replace a protective layer on one of the see-through platforms at Chicago's Willis Tower after it cracked on Wednesday. The Ledge's glass platforms extend 4.3 feet off the 103rd floor of the tower designed by Skidmore, Owings & Merrill. The firm also designed The Ledge platforms, which were completed in 2009 and received a citation in the 2010 Annual Design Review.

Tweets of the Day:
"What hideous drawings! Did anyone ever see such vulgar looking things!" Beware the wrath of Norman Shaw... pic.twitter.com/ZOUdMTQnNP
— Olly Wainwright (@ollywainwright)
May 29, 2014
Come on, it wasn't that bad Norm pic.twitter.com/61Kd3L3bVE
— Olly Wainwright (@ollywainwright)
May 29, 2014
Video of the Day: Chicago-based multimedia company Luftwerk launched a Kickstarter campaign for a project that would engage Mies van der Rohe's Farnsworth House in a light show and sound installation.
Number of the Day: 490,340—The California Housing Partnership Corporation released a report indicating that Los Angeles needs almost half a million more affordable housing units. The entire state needs almost a million more units. Here's why. [Bloomberg Businessweek]
Infographic of the day: San Francisco rent prices in a "topography of wealth." [The Bold Italic]
4 More Stories for Friday:
Designed by Renzo Piano, Hon. FAIA, The Shard in London has inspired architects to build their own crystal structures in the city. But are these copyright designs appreciated? [The Guardian]
After six years of construction, New York's No. 7 train extension to the Far West Side of Manhattan is expected to open by the end of the year, about a year behind schedule. [The New York Times]
This piece of all-in-one furniture is a bed, desk, table, counter, stove, and storage. [CityLab]
Steelblue and Autodesk produced a 3D-printed model of San Francisco's 2017 skyline. [San Francisco Chronicle]
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