PDFWAC 296-874-40042
Meet these requirements when using window jack scaffolds.
You must make sure window jack scaffolds meet all of the following:
(1) Are securely attached to the window opening;
(2) Are used for working only at the window opening the jack is placed through;
(3) Are not used:
(a) To support planks placed between one window jack and another; or
(b) As any other element of scaffolding.