![]() ![]() Complementing the experience is a state-of-the-art interactive exhibition and free audio tour about Amsterdam’s history and culture. You’ll see the city’s historical centre, its pulsating port, the unique Dutch polder landscape and you’ll spot the famous canals which belong to the UNESCO World Heritage list. There is always a fall-protection line provided for each worker and each of them must be tied to a different anchor.A’DAM LOOKOUT is an observation deck with an unrivalled panoramic view of Amsterdam. The second diagram below shows a cage that is 10 feet wide, which can accommodate two workers, suspended by a roof car. The first diagram below shows a single-person cage suspended from a davit arm. In addition, cages come in various widths (generally up to 10 feet wide) allowing workers to access a wider area of the facade. Since the cages are powered by on-board motors, the cages can descend and ascend a building. Cage SystemsĬage systems provide more flexibility than Bosun's chairs. Bosun's chairs are descent controlled and cannot be used for ascending. There is always a secondary fall arrest line that is attached to the worker and tied to a different anchor than the platform. ![]() The diagram here shows the chair suspended from a portable outrigger system, but it can be used with any suspension system. The chairs carry a single person in the seated position. However, some companies and jurisdictions do not use them because of safety concerns. A structural engineer must design the anchoring system and the parapet to carry the loads created by the lines and the window washer.īosun's chairs are the most common form of platform used by window washers and facade maintenance crews. The window washers then tie their safety lines to the permanent anchors and pass them over the parapet wall. The graphic below shows both roof mounted anchors and wall mounted anchors. In this case, permanent anchors are secured to the building structure. The most basic equipment for window washing and safety anchoring is the safety anchor or tieback. These suspension components must be carefully designed in collaboration with the structural engineer since there are high moment forces applied to them. The first component of a high-rise window washing system is the suspension supports, which are located at the roof and carry the load of the work platform. For these types of complex window washing problems, we suggest working directly with a window washing equipment manufacturer or consultant. This article covers the basic suspension support systems for use with flat roofs however, there are more complex systems based on these that can provide support from sloped roofs or other complex situations make the solutions below problematic. However, for buildings over 3 stories in height, it might make more sense to wash the windows from a roof-based suspension system where the window washing crew is lowered from the roof. Generally, windows in buildings 3 stories tall or lower can be washed using ground-based lifts or telescoping window washing poles. Local jurisdictions dictate the safety regulations surrounding window washing methods - always confirm the requirements of your local authorities. ![]()
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