The Architecture Puzzler
Created by Dave Guadagni
Solution to Last Week's Puzzler
Architecture Puzzler #556
The ratio of span to thickness in a thin-shell concrete dome is so high that these concrete shells have often been compared to eggshells. How similar are the actual ratios for concrete shells and eggshells?
An 8-inch (20-centimeter) concrete dome might span 200 feet (60 meters), giving a span-to-thickness ratio of 300. This is 10 times thinner than an eggshell, with its ratio of about 30.
Dave Guadagni, AIA, is an architect with Robertson/Sherwood/Architects
Quizzical Pursuit is Copyright 2012, Dave Guadagni.
The Dome of the Rock in Jerusalem, Israel.
Photo: Howard Davis/ Artifice Images