Floor Loads for Reliability Analysis of Lumber Properties Data
Keywords:Floor loads, roof loads, reliability, lumber, strength, adjustment factors
Utilizing load information reported in previous studies, we have developed distributions of maximum lifetime floor live loads in a form suitable for use in reliability analyses of lumber properties data. An extreme value type I distribution is chosen as best representing normalized maximum lifetime floor live loads.
Examples are given in which contrasting lumber data sets are compared using the calculated load distributions and assuming that each set must provide equal reliability, or equal safety, in the final design. A factor, k, resulting from the reliability analysis is shown to be a logical adjustment parameter for use in engineering design codes.
Combining these results with those of an earlier paper, the selection of load distributions for use in reliability analysis of lumber properties data is discussed.
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