Civil Engineering Reference
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B = design quality control factor (poor, fair, good, better, best)
C = construction quality control factor (poor, fair, good, better,
best)
D = environmental conditions factor (non-typical environmen-
tal conditions such as a harsh coastal climate or one with
long cold winters, solar radiation, hot-humid climates, ur-
ban environments, pollutants, etc.)
E = in-use conditions factor (high level of wear-and-tear, such
as K12 schools, building public areas, and parking areas or
abuse, such as correctional facilities)
F = maintenance level factor
Each of factors A through F must be evaluated and an initial value
between 0.8 and 1.2 assigned to each.
AspartofthepreventativemaintenanceprogramdetailedinChapter3,
eachbuildingcomponentmustbeinspectedandevaluatedonaperiodic,rou-
tinebasis
. Based on these evaluations, the RDSL for each component must
then be adjusted, at least annually. (Note that the RDSL can be a negative
number if needed replacement or major renovation has been postponed
or “deferred.”)
This process, then, is a systematic approach to answering the “repair
or replace” question for aging building components. During this process,
the answers to the following questions are being determined:
1. What is the age of the component relative to its design service life?
If the age is well within the design service life, then the tendency
would be to consider repair. If the RDSL is low, then the tendency
would be to replace.
2. What is the current condition indicated by condition appraisals
made during preventative maintenance procedures? Look at
condition trends…condition degradation and increased repairs may
indicate that replacement time has come.
3. Are spare parts still available? In areas of rapid technological
change, such as building DDC systems, fire alarm systems, etc.,
repair is not feasible if spare parts are not available. This may dictate
replacement even when the condition of the component is still good.
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