The document specifies a method of determiningThe steel stresses in longitudinal bars at midspan of unloaded reinforced components made of autoclaved aerated concrete. At midspan of an unloaded reinforced componentThe concrete cover,The corrosion protective coating and part of the sourrounding AAC are removed from at least three longitudinal bars, taking care to disturbThe internal stresses as little as possible.Then strain gauges are glued toThe surface of the bars.The steel stress is calculated fromThe difference of the strain gauge readings taken a) whenThe bar is under stress while still being embedded inThe component and b) whenThe bar is free from external stresses after it has been separated fromThe component.
EN 1738:1998 history
1998EN 1738:1998 Determination of steel stresses in unloaded reinforced components made of autoclaved aerated concrete