1. The sears tower in Chicago is about 15 centimeters taller on a hot summer day than on a cold winter day.
2. A 23kilometer bridge may expand and contract as much as a meter between summer and winter.
3. Concrete highway and sidewalks are built with separations or joints to allow them to expand and contract without breaking up.
4. Electric power lines, telephone lines, and railroad tracks must be built with provisions foe expansion and contraction.