National Safety Codes require all suspended building maintenance equipment on structures over 130'' (150'' or 45m in Canada) require intermittent stabilization anchors installed in the fa'§ade to provide for wind sway protection.
Stabilization can be provided by a continuous mullion track or by intermittent stabilization anchors placed every three floors or 50 feet (whichever is less) starting from the top of the building and repeating to grade in line with the support system above.
Intermittent stabilization systems are mandatory and as designed can only be used correctly when the platform comes from the roof down. The intermittent stabilization system will not work or meet code in any ground rigged application.