Detail drawings -- typical floor plan of elevator showing alteration in skylight\, roof plan of elevator shaft showing steel work\, steel diagram at floors; plan of hatchway doors\, door A\, door B\, hatchway frame\, section\, hinges\, angles\, connections; miscellaneous iron work -- straps\, beams\, columns\, Van Dorn hangers\, angles\, lock bar\, manhole\, channels; plan & section of sidewalk lights\, plan at top of cast iron frame for sidewalk lights : No. 11.