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1984

Pattern: Maintainable, multi-element external boundaries

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Part of a 5-fold Pattern Language.
Subsequently published in Encyclopedia of World Problems and Human Potential (1986)

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Pattern template

The purpose of external boundaries is to protect the space from the uncontrollable variability of the external environment. To do so it must be constructed such that the component elements can both be renewed when necessary and locked together to render the boundary impervious.

Physical The main function of the outside wall of a building is to keep the weather out. This can best be done with construction elements that lap together but can be repaired individually in patches as necessary. This is not possible with sheets of impervious material which can only be joined together with difficulty.

Broader Integration superstructure; Distortion resistant boundaries.

Narrower Symbols of integration; Tolerance at level interfaces; Appropriate construction elements.

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