Cal. Code Regs. tit. 8, § 1654 – Window Jack Scaffolds.

(a) Window jack scaffolds shall be used only for the purpose of working at the window opening through which the jack is placed. (See Plate B-35)
(b) Window jacks shall not be used to support planks placed between one window jack and another or for other elements of scaffolding.
(c) Window jack scaffolds shall be provided with guardrails unless safety belts and lanyards are provided for and used by employees. (See Section 1670.)
(d) Not more than one employee shall occupy a window jack scaffold at any one time.

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

1. New section filed 11-14-75; effective thirtieth day thereafter (Register 75, No. 46).

2. Amendment of subsections (a) and (c) filed 7-24-87; operative 8-23-87 (Register 87, No. 33).