§ 12-10 Installation of Limiting Devices.
RCNY § 12-10
Limiting devices may be used alone only as follows: (a) Sliding windows. A solid metal block, measuring at least one-half the depth of the window jamb track and one-half the width of the track, must be securely fastened by two screws into the bottom window jamb track, and a solid metal block or an “L” shaped metal stop must be securely fastened by two screws into the upper jamb window track, to prevent the window from opening more than four and one-half (4 1/2) inches.
(b)Vertical pivoting windows. Metal stopping devices must be securely fastened to the upper and lower window frames by two screws so as to prevent the window from pivoting open more than four and one-half (4 1/2) inches. The height of the stopping devices must extend no less than one inch nor more than two inches beyond the window frame as needed to stop the window. The protruding edge of the stopping device must be smooth and rounded.
(c)Upper sash of double hung windows. Limiting devices may be installed to the upper sash of a double hung window to prevent the sash from being opened by more than four and one-half (4 1/2) inches from the top rail of the window opening, provided that a TWG or air conditioner is installed in the lower sash of the window in accordance with 24 RCNY § 12-09. (Added City Record 7/23/2025, eff. 1/1/2026)
