Walls/Framing The structure has rubble masonry walls, which are approximately 20 inches thick. The walls consist of L-shaped column in each of the four corners that flare at the base to form buttresses. The columns are connected by a stone knee wall with a concrete coping that forms large window openings between the columns. Historic photographs indicate the coping is original, but sections have been replaced. The base of the columns at the corners flare to form buttresses. The historic window sashes are no longer in place; however, intermediate wood studs and mullions remain. Corner openings create the illusion of windows and support the wood framed wall segments above the openings. A concealed wood member or header spans between the stone columns and intermediate window mullions to support the roof framing. Structures The stone walls are in good condition. Patches of mortar repointing are not compatible with the original structure, and are beginning to crack and separate from the stones indicating that the repointing mortar is too strong. The repointing is a different color. There is a vertical crack in mortar joints in the northwest buttress caused by differential thermal expansion between the buttress and the main wall. Lichen growth is present at the bottom two-feet of the north wall. Lateral Force Resisting System (LFRS) The LFRS of Shelter House consists of the 1x horizontal wood roof sheathing and framing, as well as the masonry walls and buttresses. The LFRS of this modest structure is in good condition. It has performed well over the lifetime of the structure. Since there are no changes in use suggested, no Code required upgrades are triggered. Other Structural Features The Shelter House is integral with the stone rubble wall that connects with the structure at the northeast and southwest buttresses. The site has a sloped grade that sharply declines towards the north. The shelter walls are also retaining soil in some locations (the slab elevation is below grade at the south wall and above at the north). The knee walls also serve as the back to the concrete benches inside the shelter and along the street-facing, north façade, where the bench has a rubble stone base with a concrete coping. Generally the walls are in good condition, there is evidence that spalls have been repaired in the past.
Figure 1-24. Repair mortar – note red color and separation cracks, 2020 (source: JVA)
Figure 1-25. Differential settlement crack at northwest buttress, 2020 (source: JVA)
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Chautauqua Park
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