Probably 55 metres although this may be a bit optimistic and only possible if other installation mitigation procedures are adopted e.g. separating out the patch cords and the first 20 metres of cabling. TSB 155 reduces this distance to 37 metres.
pleach has chosen to develop a fully shielded 10 Gigabit solution available in two formats either as a traditional on-site terminated product or as a Pre-term solution. Either way the shielded solution guarantees 100m. The Pre-term has certainly been the more popular solution in most Data Centres because of reduced installation time and guaranteed quality.