Fear iron
Parts of a reinforcement in reinforced concrete construction or a metallic reinforcement in timber construction are referred to as fear irons , which were actually installed purely for reasons of precaution. Structurally, they are not required for the structural stability of the component, but only serve, if at all, to compensate for computational uncertainties with regard to material properties, load assumptions , design deviations or a more or less high safety factor .
The installation of fear bars goes back to the times when the calculation methods for supporting structures were still subject to greater uncertainties and, for fear of the failure of a construction, additional material was simply installed in endangered areas. It also happens that reinforcing bars provided in the statics are left out as suspected fear bars in order to avoid costs.
Web links
Individual evidence
- ^ Hermann Flessner: First work with Zuse computers: Volume 2 - Flexural strength of reinforced concrete girders . 7th edition. Books on Demand, 2016, ISBN 978-3-7412-2557-4 , pp. 176 ( limited preview in Google Book search).
- ^ Karl-Werner Schulte: Real estate economics: Volume II: Legal foundations . 2nd Edition. De Gruyter, 2006, ISBN 3-486-57806-5 , p. 566 ( limited preview in Google Book search).
- ↑ Christoph Hackelsberger: Concrete: Philosopher's Stone ?: Thinking about a building material . 1st edition. Birkhäuser, 1988, ISBN 3-7643-6367-3 , p. 70 ( limited preview in Google Book search).
- ↑ Rainer Kurbos: Building law in practice: Basics - Documentation - Awarding - Additional costs - Defects and damage . Linde, Vienna 2013, ISBN 978-3-7093-0523-2 , pp. 191 ( limited preview in Google Book search).