General Services, Department of
(Department of General Services)
Stair Modifications and Mortar Replacement
NOE - Notice of Exemption
Work on this project includes all labor, materials, and equipment as needed for grinding, shaving, and refinishing of existing granite steps located at building entrance to 350 McAllister Street as required to provide positive slope and drainage on all steps. Corrected stair slopes shall provide for a gradual change in grade between adjacent steps along the long dimension of the step as measured at the stair nosing (maximum transition shall no exceed 1/4" in ten feet). Following slope corrective work, all steps that were shaved shall be bush hammered to match the surrounding historic stone finish. In addition the entire step assembly shall be lightly sand blasted to achieve a uniform appearance between the remedial work and the steps that have a positive slope. If removed during grinding/shaving process, incised detectible warning grooves at stair nosing shall be re-cut to match the pre-existing condition.
Class 31 consists of project limited to maintenance, repair, stabilization, rehabilitation, restoration, preservation, conservation or reconstruction of historical resources in a manner consistent with the Secretary of the Interior's Standard for the Treatment of Historic Properties with Guidelines for Preserving, Rehabilitating, Restoring, and Reconstructing Historic Buildings. The design will meet published federal standards for the treatment of historic properties. The granite steps will appear the same from street level, once repaired for slope and drainage. The Office of Historic Preservation has reviewed the plans and concurred that no adverse impact to the building will occur.