Graphical Construction Glossary >> Temporary Work. >> Scaffolding >> Cat Ladder
In the photo above there is a ladder lying on the roof surface. It is being used as an aid during the construction of a new dormer window.
Above is a sketch of a the ladder. They are not intended and should never be used as a normal ladder. They are usually home made, often just for a specific job and they rely on the roof surface itself for support.
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