Grids and surfaces

[Image: Steven Holl's Simmons Hall, MIT; photographed under construction by Stanley Greenberg. Greenberg was the focus of a recent BLDGBLOG post on the underground constellations of drainage known as New York City's water system, with its secret valve chambers; Greenberg's new show at Candace Dwan Gallery, NYC, is worth a visit – it's open till 20 May 06].