I Sverige finns det inte många höga trähus, trots den enorma tillgången på material och det faktum att de allra flesta villor/småhus är byggda av just trä. Att trä är ett lätt byggmaterial, är väl lämpat för prefabricering samt är återvinningsbart i stor utsträckning medför att det är väldigt konkurrenskraftigt. Så varför utnyttjas inte detta byggmaterial oftare? En av anledningarna till det ligger i de konservativa regelverk som tidigare funnits i Sverige, de har inte tillåtit att bygga högre än två våningar med bärande stomme av trä. Något som ändrades vid årsskiftet 93/94 då en ny norm, BBR 94, kom som gjorde det möjligt för trä att användas i stommar.

Masonites flexibla byggsystem, är ett byggsystem utvecklat av Masonites Beams AB för flervåningshus, bostäder och kontor i trä.  System är anpassat så att det i största möjliga utsträckning går att använda sig av prefabricerade element direkt från fabrik, för att sedan hopfogas med mekaniska förband på byggarbetsplatsen.Masonites förslag på en infästning mellan bärande väggar är utformad som en montagedubb vilken förs ned i ett hål i underliggande väggelement. Montaget av dubben fungerade inte önskvärt, och det finns tveksamheter i montagedubbens förmåga att ta upp vindinducerande krafter.Examensarbetet syftar till att utforma och dimensionera ett nytt väggbeslag till Masonites flexibla byggsystem där snabbt montage av beslaget är viktigt. Iden är att såga en kontinuerlig slits i väggelementen som man sedan fäster plåtar som skruvas fast i det övre- respektive det undre väggelementet. Skruven som används är en självborrande skruv för att slippa förborrning av plåten och väggelementet.Reglerna i Eurokod 3 och 5 ligger till grund för beräkningarna av beslaget och lastnedräkningen av ett 8-våningshus är enligt BKR. Lämplig indata till lastnedräkningen gjordes i samråd med erfaren konstruktör och inblandade i MFB från Masonite.

?Boverket? the Design Regulations in Sweden, also called BKR has for a long timebeen the mandatory standard that has guided and regulated construction design. Butat the end of 2010 BKR was replaced with Eurocode. This report deals with thecomparison of these two standards when it comes to wood construction. Duringwinter 2009/2010 there were many roof collapses due to excessive loads on theroofs across Sweden.

Today, we use BKR and BBK 04 when designing concrete structures inSweden, which will, in the near future, be replaced by Eurocode 2. When you are designing buildings, you will use Eurocode 2 Part 1-1 and with this new standard, some new rules and general rules will be necessary to adopt. To examine how BKR and BBK 04 tells apart from Eurocode 2 when designing concrete structures, one beam and one column with often common dimensions, is studied. The beam is designed with consideration of (considerate to) durability at bending moments, shear forces and control of cracking. The column is designed with consideration of durability at eccentric axial load and bending moments in cross section on account of (due to) geometric imperfections. BBK 04 has gone one step closer to Eurocode 2 than earlier editions and the things that are different, when calculating reinforcement, is how they use the partial factors.

This report describes how the system may be exposed to oscillations and how this can lead to resonance. Resonance is a phenomenon that occurs when a system is affected by external periodic oscillations with frequencies close to the system's natural frequencies. Structures subjected to resonance can risk great damage and destruction, why resonance is something that is important to take into account when designing structures. Alternative ways to counteract resonance is to supply damping in the system. Damping means that the resonance decreases instead of letting the amplitude increase.The report discusses some examples on constructions that have experienced the effect of resonance.

This report describes how the system may be exposed to oscillations and how this can lead to resonance. Resonance is a phenomenon that occurs when a system is affected by external periodic oscillations with frequencies close to the system's natural frequencies. Structures subjected to resonance can risk great damage and destruction, why resonance is something that is important to take into account when designing structures. Alternative ways to counteract resonance is to supply damping in the system. Damping means that the resonance decreases instead of letting the amplitude increase.The report discusses some examples on constructions that have experienced the effect of resonance.

This report describes how the system may be exposed to oscillations and how this can lead to resonance. Resonance is a phenomenon that occurs when a system is affected by external periodic oscillations with frequencies close to the system's natural frequencies. Structures subjected to resonance can risk great damage and destruction, why resonance is something that is important to take into account when designing structures. Alternative ways to counteract resonance is to supply damping in the system. Damping means that the resonance decreases instead of letting the amplitude increase.The report discusses some examples on constructions that have experienced the effect of resonance.

This report describes how the system may be exposed to oscillations and how this can lead to resonance. Resonance is a phenomenon that occurs when a system is affected by external periodic oscillations with frequencies close to the system's natural frequencies. Structures subjected to resonance can risk great damage and destruction, why resonance is something that is important to take into account when designing structures. Alternative ways to counteract resonance is to supply damping in the system. Damping means that the resonance decreases instead of letting the amplitude increase.The report discusses some examples on constructions that have experienced the effect of resonance.

This report describes how the system may be exposed to oscillations and how this can lead to resonance. Resonance is a phenomenon that occurs when a system is affected by external periodic oscillations with frequencies close to the system's natural frequencies. Structures subjected to resonance can risk great damage and destruction, why resonance is something that is important to take into account when designing structures. Alternative ways to counteract resonance is to supply damping in the system. Damping means that the resonance decreases instead of letting the amplitude increase.The report discusses some examples on constructions that have experienced the effect of resonance.

Laser scanning is a method of surveying that has evolved rapidly in recentyears. The technique is based on a laser scanner set up, which can document a structureusing pulsed laser Beams. Each time the laser hits a surface it is partly reflectedback to the scanner that stores the point. By using strategically placed targets, storedpoints from different scans can be merged into a point cloud. A point cloud is avisualization of the scanned object with a very high accuracy.

This report deals with prefabricated bathrooms and the advantage, during the production process, they have compared to ordinary produced bathrooms.The work is done together with the building company JM. The common task is to investigate if the manufactures, in spite of standardized design can meet the concept of JM, i.e. high flexibility and adjustment towards the customer. In JM they are doubtful to the method, as they did not yet worked with prefabricated modules and think that the choises for the costumer will be limited.There will be a short resume of the progress of the bathrooms and its importance as sanitary and wellbeing.The recent problems with damage caused by damp in bathrooms. Have resultade in regulations.

I samband med att intresset för att bygga högre trähus har ökat så krävs nya lösningar för att t.ex. kunna möta efterfrågan på stora öppna ytor och långa spännvidder. Träbjälklag med lång spännvidd har dock oftast svårigheter med att klara kraven på svikt och vibrationer. Ett nyutvecklat förslag på träbjälklag som förmodas klara dessa krav bättre än traditionella träbjälklag har varit utgångspunkten för detta examensarbete där syftet har varit att undersöka bjälklagets styvhet. Detta gjordes laborativt genom att bygga och testa en prototyp av det föreslagna bjälklaget och genom att en numerisk modell baserad på finita element metoden togs fram och användes för att studera hur olika parametrar påverkar bjälklagets styvhetsegenskaper.Bjälklagets design bygger på fackverksprincipen i primärriktningen och på balkverkan i sekundärriktningen.

The industrialization in Sweden has increased the large number of areas that have been contaminated with various types of pollution. One of those sites are the property Höjen 3:24 in Arboga where ?Arboga Mekaniska Verkstad? once been. The property wants to increase the use of the old former foundry building with the adjacent ?plate-workshop? and believe there are two options for the building: That the building either should be used as a warehouse/concert hall, or rebuilt into a cultural center. An environmental evaluation has shown that the levels of heavy metals are over the Swedish environmental protection agency guidelines of less sensitive land.

I jordbävningsdrabbade områden är stabilisering av byggnader en avgörande del i husens utformning. I många av dessa delar av världen lever stora delar av befolkningen i fattigdom med begränsad tillgång till resurser och moderna byggtekniker. Byggnader i jordbävningsdrabbade områden förstärks i olika mån, beroende på jordbävningsfrekvensen och deras magnitud. Staden Arusha i utvecklingslandet Tanzania är ett sådant område som drabbas av små till måttliga jordbävningar, då och då. Där förstärks byggnader med s.k.

This Master thesis is about a postal- and telegraphic building in Eskilstuna, Sweden. The construction methods for the specific building and buildings in general from the same time are described. The purpose of the report is to describe the loads acting on the building and how it has been built and why it has been rebuilt during the years. After this, possibilities of reconstruction and adaptation for today?s demands can be evaluated.