There were quite a few methods and types, ranging from just dangling the excecuted /dying person from a rope to the specially constructed cages. Sometimes they were also used to punish the victim for a small crime.
In this case, the person would only spend a couple of days in the cage, although depending on the time of year (weather) and the health of the person, this could lead to death.
The construction of the cage (thin card) wasn´t as difficult as I thought it would be. If anyone´s interested I can make an "how to"