Quantcast Age of the Building

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Figure 1-3.  Swim Pool Areas. (Swimming pool areas may develop high
humidities which increase the potential for condensation and consequent
decay problems. Humid air alone will not result in wood wet enough
to decay.)
1.2.2-B AGE OF THE BUILDING. Age alone is not a deteriorating
factor, but it can be an indicator of the basis for the building design and of how
it was constructed. Methods of stress-grading wood structural members have
changed over the years, as have methods of assigning allowable stresses, and
in some cases species properties have changed, especially when the supply
changed from virgin timber to second growth. The design and manufacture of
glulam members has also changed. Prior to the late 1940's, adhesives used were
not waterproof, so the potential for delamination is greater in buildings of that
age. During World War II, the urgency for providing military buildings
sometimes resulted in the use of green or only partially dried lumber which later
resulted in numerous check and splits as well as loosening of connectors.
1.2.2-C EXPOSURE OF WOOD ELEMENTS.  The degree of exposure
of wood structural members to rain and other weathering effects is a major factor


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