Ny modell av lyftpunkt : En teoretisk och praktisk utredning av dess bärförmåga

Sammanfattning: Lättelement AB designs and manufactures building elements in the form of ceilings, walls and floor tiles for the Nordic market. The majority are roof elements and the main market is Sweden. Each element has 4 lifting points. Lifting points are used for lifting elements, pulling together elements as well as attachment for fall protection equipment. Lättelement AB has designed a new model of lifting point that they want tested and intend to replace the current lifting point if the new model has the same or better capacity. The purpose of this work is to investigate if the new model of lifting point manages the forces that arise during its applications. This new model would facilitate the manufacture and assembly of lifting points. According to the theoretical calculations, the new model of lifting point would have better capacity than the current one. During tensile testing, unforeseen material failure were shown and the practical values ​​were significantly lower than expected. After tensile testing, the load capacity was calculated based on the current material failure and it was found that the calculations and test results are relatively well matched. Based on the requirements set for the new model of lifting point, the desired strength values ​​are not achieved to replace the current model. However, this work is a good basis for further development of the lifting point. Now it is known what happens at the material failure for this kind of lifting point. It provides an opportunity to construct a lifting point that will handle the desired capacity while at the same time being flexible from a production engineering perspective.