lower_main_seventh_floor_reference_to_opening_sill
4′3½″51.5 in
Lower/Main F7 reference to graphic sill of window7/44. Distinct witness from raised south-end floor to same sill.
Drawing notation: 4′3½″
Lower/Main F7 reference to graphic sill of window7/44. Distinct witness from raised south-end floor to same sill.