The thesis was performed at the lighting company Zpecta AB. Zpecta needed to develop alternative attachment of their LED-luminaire Capella. Today Capella attaches in metal ceilings with four magnets. Zpecta got indications from their customers that there was a need for other attachments. The purpose is to determine the customer’s requirements and the interfaces that are considered for Capella. During the thesis, Capella was only on the market for testing and evaluation. The thesis was initiated to create a specification. The specification would cover all the demands and wishes Zpecta and their customers have. The specification should also contain the regulatory requirements. To find out the requirements for a luminaire, an information research was conducted by visiting customers, researching the Internet, verbal information and by studying literature. Design concepts were developed to attach the Capella to ceilings made of wood, concrete and plaster, with wire suspension, at system ceiling, acoustic ceiling and at 3-circuit track. Capella’s magnetic attachment was tested in order to the specification. The result showed that the magnetic attachment did not meet the requirements. Therefore a solution, that meet the requirements for the magnetic attachment, would be developed and also an alternative design solution for mounting at 3-circuit track. The design concepts were evaluated by using the Pugh selection matrix and a questionnaire. Three design solutions were developed for mounting at 3-circuit track and wire suspension. The design solutions were presented as an assembly in SolidWorks, with a manufacturing method, a FMEA and a cost estimate. For the three design solutions that were developed, there have to be prototypes for testing to get knowledge about how well the design solutions meet the specification. / Examensarbetet utfördes på belysningsföretaget Zpecta AB. Zpecta ville ha hjälp med att ta fram alternativa infästningar av LED-armaturen Capella. I dagsläget fästs Capella i undertak av metall med fyra magneter. Zpecta har fått signaler om att det finns behov av andra infästningar än magnetinfästningen. Syftet är att ta reda på kundens krav på infästningar samt att ta reda på vilka gränssnitt som är aktuella för Capella. Under tiden som examensarbetet utfördes fanns Capella endast på marknaden för utvärdering och för test av LED-armaturen ute hos kund. Examensarbetet inleddes med att ta fram en kravspecifikation. I kravspecifikationen dokumenteras alla regulatoriska krav samt de krav och önskemål som Zpecta och Zpectas kunder har på Capella. För att ta reda på de krav som ställs på en belysningsarmatur gjordes en grundlig informationssökning med hjälp av studiebesök, Internet, muntlig information samt litteraturstudier. Konstruktionskoncept togs fram för att montera Capella i trä-, betong och gipstak, med wireupphäng, i systemundertak och i akustiktak samt i 3-fasskena. Capellas magnetinfästning testades utefter de krav som fanns i kravspecifikationen. Testerna visade att magnetinfästningen inte klarade de krav som ställs på en armaturs infästning i tak. Efter genomförda tester beslutades det att en godkänd lösning för magnetinfästningen skulle tas fram samt en alternativ konstruktionslösning för infästning i 3-fasskena. Med hjälp av Pughs urvalsmatris och en enkät utvärderades konstruktionskoncepten. Tre konstruktionslöningar arbetades fram för infästning i 3-fasskena och med wireupphäng. Konstruktionslöningarna presenteras som en assembly med ingående parter i SolidWorks, lämplig tillverkningsmetod, en FMEA, samt en kostnadsuppskattning. De konstruktionslöningar som togs fram bör det göras prototyper på för test och utvärdering för att kunskap ska fås om hur väl konstruktionslöningarna fungerar.

<p>The purpose with this report is to illuminate the construction solutions and the deformations that could exist in medieval parish stone churches. But also to increase the writers understanding how activity forces effect the construction of the churches. With help from literature and a practical study, containing three churches the writers have collected the material that the conclusions and discussions are built upon in this report. </p><p>The construction of the churches consists of three parts, the wall, the roof and the vault. The construction solutions are similar in the churches disregard of the roof, where the roof trusses are different. The roof trusses are yet typical for the roman style. The deformations that have been found can in most cases be could usual occurring in these old churches the writers chosen to study, the needs to repairmen are today not necessary. Yet the writers think that there are deformations that should be study more thorough, to derive the origin and take suitable measure. The writers think that the deformations that effect the constructions have most of their origin in some rebuilding and lost knowledge of old building engineering.</p>

The purpose with this report is to illuminate the construction solutions and the deformations that could exist in medieval parish stone churches. But also to increase the writers understanding how activity forces effect the construction of the churches. With help from literature and a practical study, containing three churches the writers have collected the material that the conclusions and discussions are built upon in this report. The construction of the churches consists of three parts, the wall, the roof and the vault. The construction solutions are similar in the churches disregard of the roof, where the roof trusses are different. The roof trusses are yet typical for the roman style. The deformations that have been found can in most cases be could usual occurring in these old churches the writers chosen to study, the needs to repairmen are today not necessary. Yet the writers think that there are deformations that should be study more thorough, to derive the origin and take suitable measure. The writers think that the deformations that effect the constructions have most of their origin in some rebuilding and lost knowledge of old building engineering.