Topographical maps. http:// reynolds.asu.edu/topo\_gallery/topo\_gallery.htm. cliff. Mountain. Complex valley. Contour maps how to read. http://www.compassdude.com/topographic-maps.shtml http://adventure.howstuffworks.com/outdoor-activities/hiking/how-to-read-a-topographic-map2.htm.
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Make structures that can bend.
Strengthening the foundation and securing the building to the foundation
Shear walls are vertical walls that are designed to receive lateral forces from diaphragms and transmit them to the ground. The forces in these walls are predominantly shear forces in which the fibers within the wall try to slide past one another.