The use of weather and climatological data in evaluating the durability of building components and materials

Abstract

The durability of building components and materials is dependent, to a large extent, on the in-service environment to which they are subjected. Thus, the prediction of durability requires knowledge of the service environment .Weathering factors, which comprise one group of environmental factors, are the subject of this report. The objectives of the report are to identify the types of climatological and weather data that are available and to indicate how, in the present state of knowledge, weather and climate data can be used to aid in quantifying weathering factors so that durability tests for building components and materials may be designed.

NBS solar collector durability

“…Examination of the population distribution for the 1970 census as a function of climatic region indicates that about 96% of the people in the U.S. live in two major climatic regions:C, Humid Mesothermal, and D, Humid Microthermal, as shown in Table 4rl[25] .The more extreme climates in terms ofprecipitation such as A, Tropical Rainy, and B, Dry, account for about 4%. The Polar and Undifferentiated Highlands contain a relatively small percentage of the continental U.S. population.…”

Environmental effects on the strength of a glass fiber-reinforced-plastic rod material

“…With these values and Eq (A. 2) the total ultraviolet radiation which impinges on a unit length of guy rod over a one-year exposure in various locations may be calculated using available tabulations of q [23].…”

“…percent[16], 3 percent[22] and 5 percent[23]. The angle 9 depends upon the orientation of the guy and the instantaneous location of the sun.…”