

Semicircular Arch
Compare its maximum and
minimum thrust for different thicknessradiusratios. 



Arch collapse II
Understand
the relation of the line of
thrust
to a possible collapse mode for an arch on
leaning buttresses. 


Flying Buttress
Explore the infinite
possible lines of thrust and understand the influence of
geometry on its structural performance. 



Natural bridge
Erosion will finally cause
collapse, but we can
use a thrust line analysis predict at what point
these
marvels of nature are in danger. 


Arch collapse I
Understand
the relation of the line of
thrust to a possible collapse mode for an arch on
spreading supports. 



Not
all models have been constructed to be
webbased. See the movie screen captures
in the
online
presentation
for examples of
more advanced models. 
Download Java software for your computer
(necessary to load the applets). 