(57) The invention relates to a vertical support structure for a safety fence system on
the outside of a building roof. The vertical support structure (50) comprises a lower
support (100, 101, 102) that may be supported against the ground or some other support
surface, an upper support (140) that rests on the lower support and may be placed
against the underside of an eave of the roof and, in addition, a tightening structure
for changing the distance between the lower support and the upper support for tightening
the vertical support structure between the underside of the eave and the support surface.
In addition, the vertical support structure comprises a support (121) for a rail post
(C).
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