Let me try to illustrate what I mean with a rudimentary sketch: [ANDY REVKIN writes: Dr. Pujol's
illustration didn't work and he sent this link to a
fantastic drawing
showing a safer school - building design: / / cobweb.ecn.purdue.edu/~spujol/P-School.htm]-RSB- O ---- O O ---- O O O O ---- O O ---- O