Proposed level i interior alterations (approx. 543 sq ft) to an existing 3-story single family attached townhouse. No proposed alterations to existing bldg footprint or exterior envelope. Proposed alterations include removal of existing wood staircases and replacement with steel staircases from 1st floor-3rd floor within existing framed stair openings. Alterations include related structural modifications and finish work improvements as noted on plans. Extents of selective interior demolition: removal and replacement of existing wood staircases (1st-3rd floors), removal and replacement of existing wood finish flooring at 2nd floor level, limited structural framing modifications as noted on plans. G. C. Shall provide all required temporary shoring prior to modifying existing framing.