The SIA‘s widely-applied body of standards provides recognized and indispensable regulations for planning and construction in Switzerland. The Society continuously reviews, revises and updates the standards and supplies information about their application. 

The standards and the corresponding codes of practice and documentation are drawn up on the basis of parity by planners, building owners, contractors, suppliers and public authorities, universities and colleges.


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Coefficients Z

Coefficients z 2017Z1Z2
Architects, SIA 1020.06210.58
Civil engineers, SIA 1030.0757.23
Landscape architects, SIA1050.06210.58
Building installations, SIA 1080.06611.28

  coefficients z (2005 - 2017)