Crooked Church Spire
Crooked Church Spire
A crooked (or twisted) spire is a pyramidal tower with a twist relative to its base. This can be by design or as a result of changes over time caused by weathering [1].
This Demonstration simulates the twisting process of a pyramidal tower of fixed height caused by an expansion of its lateral edges due to faulty materials (undried wood), temperature, or humidity.
A classic example of a crooked church tower is the one in Chesterfield, Derbyshire, England [2].