A06-Drawings_GEGR_247283-100__CD_-_2026_04_15.pdf

This document is a set of construction drawings for the replacement of an EPDM roof system at General Grant National Memorial in New York, New York (Project 247283). The drawings provide detailed design specifications, site plans, building elevations, and membrane roof details for the rehabilitation project.

The project scope includes removal of the existing EPDM membrane roof system and installation of a new membrane roof with associated flashings, counter-flashings, and base details. Key construction elements specified include protection of the stone dome structure, stone parapet, and slate roof surfaces; installation of new membrane roofing at the conical dome with detailed flashing at mechanical vents, parapets, and the colonnade drum; removal and replacement of roof drains and scuppers; and treatment of existing wood catwalks and structural elements. The drawings indicate two options: Option A requires preparation and painting of structural steel members in the dome chamber, and Option B addresses porch stone roof cleaning and reporting. Site protection requirements include staging areas, protection matting for existing paving and flagstone, tree protection with fencing, and restricted vehicle access routes. Condition observation photographs document existing membrane deterioration including failed seams, membrane separation at edges, standing water accumulation, plant growth on roof surfaces, and interior plaster damage from water infiltration. The construction documents consist of 14 sheets of architectural drawings prepared by John G. Waite Associates, with the National Park Service Denver Service Center managing the project on behalf of the Department of Interior.