Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Timber is one of the primary building materials of today, both in Sweden and in Europe, its uses range from single-family homes to apartment buildings and large arenas. The key reasons why timber construction continues to grow is the environmental aspects combined with the economically advantageous industrialised prefabrication process. One of the most commonly used connections in timber structures is the punched metal plate fastener, which is a perfect example of an effective connection that only can be used in a prefabrication process. It can be found in almost all kinds of buildings; from a rafter connection in small to middle sized houses up to reinforcement in heavier connections in arenas and warehouses. It is well known that the connections are the most critical parts of a structure and it is therefore crucial that these are designed for all eventualities. This project is a pilot study that seeks to evaluate the existing design methods for punched metal plate fasteners subjected to fire in Eurocode and in practice. The first conclusion is that such a method hardly exists, neither in codes nor in scientific theory, despite the fact that this is and has for decades been a very common structural detail. The theoretical analysis shows that it is very unlikely that a joint made with punched metal plate fasteners can withstand a standard fire scenario for even 15 minutes and the small-scale testing confirms this. But the project also shows that it is possible to protect the punched metal plate fasteners from fire and that it is possible to achieve up to 30 minutes resistance by installing gypsum fireboards, stone wool wood covering.
Place, publisher, year, edition, pages
2012. , 61 p.
Teknik, Timber joint, punched metal plate fastener, fire, träförband, brand, spikplåt, EN 1995-1-2
IdentifiersURN: urn:nbn:se:ltu:diva-42961Local ID: 0e591170-760e-441e-98ef-2cbf840f4478OAI: oai:DiVA.org:ltu-42961DiVA: diva2:1016188
Subject / course
Student thesis, at least 30 credits
Fire Engineering, master's level
Validerat; 20121013 (anonymous)2016-10-042016-10-04Bibliographically approved