Uppbyggnad av flervåningshus : Jämförelse mellan trästomme kontra traditionell betongstomme ur ett praktiskt perspektiv samt ur brand- och fuktrisker

Purpose: This work has been based on getting more builders to want to build multi-storey houses with a wooden frame instead of a concrete frame. Building with various frame materials, concrete and wood, has good properties but also its challenges. On the other hand, competence and experience have a major influencing role during the production phase. This degree project has been chosen to be written by PEAB. The work focuses on and deepens itself within fire risks and moisture problems. This degree project also addresses what experience and competence look like and how they affect the production phase. Method: This work consists of literature study, case study, interviews, study visits and reference object description. Where information was taken from previous degree projects, scientific articles and research reports. The case study that was done for this work was about two different schools, Westerlundska gymnasiet and Irstaskolan, where both are built by PEAB. There were also interviews with site managers, fire consultants and contracting engineers, where relevant questions about the subject areas fire and moisture were asked in connection with concrete frames and wooden frames. Results: Concrete as a material has good properties around fire and moisture. Concrete as a building material has long been used in the construction industry, where competence and experience are high. However, certain shortcomings in the event of a fire can occur when a multi-storey building with a concrete frame is built. Wood as a building material has other properties compared to the building material concrete. An important property of wood is that it maintains a much lower temperature on the various parts that have not caught fire yet. Conclusion: The conclusions from this project are that many construction actors choose to build with a concrete frame instead of a wooden frame. This is because experience and competence in concrete frames is greater than in wooden frames. From a fire and moisture perspective, there are challenges and solutions when it comes to concrete frames and wooden frames. It has long been built with a concrete frame, which means that more construction players have more competence and experience when it comes to concrete frames and therefore choose to work with something they are experienced with. However, there is an increased interest and construction players have an understanding that wood will be more common as a frame in multi-storey buildings in the future