By Diane N. Palmer

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Of a building built entirely of wood? 1 Of a building in a windy location? What are all the ways in which we may warm a building, cool a building, or illuminate a building? These questions come naturally to mind in response to themes that recur again and again under various functional headings, and the answers, as they accumulate, begin to reveal the larger functional patterns that underlie every building. 32 5 Providing? Water Buildings and settlements require an adequate supply of clean water for drinking, cooking, washing, industrial processes, and agriculture.

This can happen for any of several reasons: Perhaps the septic tank is too small for the building it serves. Perhaps the soil in the leaching field is not sufficiently porous or the system is installed too near a well, a body of water, or a steep slope. To guard against such failures, most municipalities and states have stringent regulations requiring soil testing and the utilization of approved techniques of design and construction in the installation of septic systems. It is not uncommon for a potential building site to prove incapable of accommodating a septic system and therefore to be incapable of supporting a building.

The filtering action that occurs during the long horizontal passage through the stratum results in water that is often totally free of bacteria, although it may be laden with dissolved minerals. Most such minerals do not affect the potability or usefulness of the water. Certain calcium salts, however, can cause the internal scaling and eventual obstruction of water pipes and form an insoluble scum when combined with ordinary household soap. Water rich in calcium ions is known as hard water. Hard water usually tastes good and deposits little scale in pipes as long as it is cold.

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