Stack LaddersWritten by Michael Draper
Besides the squeegee there may not be any tool more synonymous with window cleaning than Stack Ladders. They have long been a part of the window cleaning industry dues to ease of set up and the size of the ladders when apart. However, there are some serious safety concerns with stack ladders that have to be adhered to besides the normal concerns of ladders like ladder angle, unstable base and unstable top.
The manufactures of stack ladders have placed a height restriction on stack ladders. This restriction can be found on the sticker on the side of any piece of stack and it is 21’ on Metallic Ladders. What that means is 6ft sections can be placed a maximum of 4 sections high as each section overlaps one foot. What if you own older Metallic or Alcoa ladders that were made prior to the newer models? There was always a height restriction. Some older models may have a sticker stating 28’ or even higher. If the sticker on the ladder is still legible it would be OK to use, however if the stickers are no longer legible it would be best to default to the current standard being utilized.
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