921 Main Historic Structure Assessment

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DAJDESIGN ARCHITECTURE, INTERIORS Condition Evaluation: Our evaluation of the floor structure is limited as not all of the structure was exposed for analysis. This includes the floor sheathing, rim joists, and floor joist attachments. Our assessment is for the portions of the floor framing that were visible. However, it is likely that the non -visible areas are framed in a similar manner and are in a similar condition as the areas that were visible. It is also noted that the floor framing materials and methods are typical of wood framed buildings constructed around the same timeframe in the Louisville area. vAThe 2x6 floor joists are in fair condition. The joist sizing and ` spacing do not meet minimum IBC code requirements for today's standards, especially for office use whereas this building was originally constructed and used as a house. However, the main level floor felt sturdy and no significant areas of bulging or sagging were observed. The beams and columns that appear to have been added in 2023 (although possibly in 1978 as building records are unclear) do not meet minimum IBC code requirements for today's standards and are therefore in poor condition. The column spacing exceeds the minimum required for office use and the footing depths could not be determined without further destructive investigation. 3-ply beam supported by steel columns. The stacked CMU supports in the crawlspace were likely added to the midspan of the joists to support sagging floors. However, these supports do not meet minimum code requirements and are not properly constructed or supported and are therefore in poor condition. The floor sheathing was not entirely visible for analysis as it is covered by finish floor layers on the main floor and fiberglass batt insulation from beneath. Some areas of insulation have fallen or been removed exposing the floor sheathing to a small extent. It is likely that the floor sheathing seen in these exposed areas is consistent throughout. The visible floor sheathing is 1 x3 tongue -and -groove that would have been the original finish flooring as is common for buildings built around the same timeframe in Louisville. This type of floor sheathing does meet current code requirements and is in good condition. The floor insulation is fiberglass batts within the floor joist bays that are primarily unfaced. The insulation appears to have been added in 1978 with a presumed insulation value of R-19. The floor insulation is in fair condition as there are some areas where the insulation has fallen or been removed and the insulation value is below current code requirements for floors. 921 MAIN PAGE - 22