Sec. 23-5.20. Window jacks

(a) Approval required.

All window jacks shall be approved.

(b) Construction of window jacks.

All window jacks shall be constructed, installed and used in compliance with section 23-5.1 of this Subpart.

(c) Window jack use.

Every window jack shall be limited to light duty loading and shall be used only for the purpose of working at the window opening through which such jack is installed. No more than one person shall occupy a window jack at any one time. Window jacks shall not be used as supporting elements or anchorages of scaffolds or other devices and the placing of planks between one window jack and the jack of an adjacent window is prohibited.