Service holes in Siniat Metal C Studs for Siniat Partitions are 25mm wide.

Where additional space is required for services, a single centrally located opening may be formed over an existing service hole in 70mm, 90mm and 146mm Siniat C Studs. The size of the opening should not exceed 40% of the stud width as follows: 

A protective grommet/sleeve should be included to protect any services passing through the stud.

Service openings cannot be created in Siniat CH studs for Shaftwalls or Siniat I Studs for Independent Wall Lining systems.