The Architecture Puzzler
Created by Dave Guadagni
Architecture Puzzler #569
The main spans of the longest suspension bridges tend to be how many times longer than the main spans of the longest steel arch bridges?
Question from Last Week:
Architecture Puzzler #568
Match these stones with the descriptions below: slate, marble, granite, travertine, and limestone
a. Once a limestone, this stone achieved metamorphosis from intense pressures and high temperatures within the earth.
b. A variety of limestone formed in pools by the precipitation of hot mineral-rich spring water. The characteristic holes were created when carbon dioxide bubbles were trapped as the stone was being formed.
c. A fine-grained, metamorphic stone derived from sedimentary rock shale.
d. A sedimentary stone, formed from prehistoric skeletons and shells.
e. An igneous rock, once molten, which formed as it cooled deep within the earth.
f. Commercially, any stone capable of taking a polish (with the exception of granite).
Answer to Puzzler #568
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Dave Guadagni, AIA, is an architect with Robertson/Sherwood/Architects
Quizzical Pursuit is Copyright 2012, Dave Guadagni.
At 3,911 meters (12,831 feet), the Akashi Bridge (1998), near Kobe, Japan is the longest suspension bridge in the world.
Photo: Xiaojun Deng