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Application to replace sidewalk at 27–29 Great Jones Street cites deteriorated granite flags and corroded support beams
Summary
Representatives for 27'29 (2729) Great Jones Street asked the committee to permit replacement of granite and concrete sidewalk flags after reporting corrosion of supporting steel beams and water infiltration into vault spaces.
Representatives for the building at 27–29 (2729) Great Jones Street requested permission to replace the existing sidewalk slabs above vaults after documenting corrosion and water infiltration under the granite and concrete flags.
The presenter, speaking on behalf of structural engineer Steven Wong and the building, said the existing sidewalk includes heavy granite slabs (about 10 inches thick) supported directly on steel beams with no curb or waterproofing; joints have allowed water to pass into the vaults below, causing corrosion, delamination and damage to mechanical and electrical equipment. The presenter showed photos of vault…
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