The unique exposed structural framing system at the base of the tower, combined with the overall tapering form, increases the building's lateral (side-to-side) and torsional (twisting) stiffness. Such structural design implementations have played an important role in counteracting not only typical loads such as wind, but also those caused by earthquakes, which frequently occur in this seismically active region. Most notably, Transamerica Pyramid withstood the 7.1-magnitude Loma Prieta earthquake of 1989 and sustained no damage.

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Make:	NIKON
Model:	COOLPIX L820
Exposure:	0.033 sec (1/30)
Aperture:	f/3.0
ISO Speed:	400
Focal Length:	4 mm