Utvecklingen för Sveriges jordbruk går mot färre och större gårdar runt om i landet. Jordbrukarnas växande verksamhet resulterar i ett ökat antal djur i boskapen. Detta ger ett större behov av stallbyggnader med öppna ytor och långa spännvidder. Länsstyrelsen har uppmärksammat stora variationer i de totala byggkostnaderna för stallbyggnader i landet. Tillsammans med Länsstyrelsen Gävleborg utvecklades en idé att undersöka hur materialkostnaderna påverkas av olika spännvidder och olika stomsystem. Målsättningen är att undersökningen ska resultera i ett beslutsunderlag för ny-, till- och ombyggnation av stallbyggnader. Tidigare forskning och teori undersöktes samt ett flertal platsbesök gjordes för att öka kunskaperna inom området och fastställa vilka spännvidder och stomsystem som skulle undersökas. En parametrisk studie på fyra olika typfall av stallbyggnader gjordes. Två typfall i undersökningen konstruerades av trä och två av stål. Den parametriska studien ska redovisa samband mellan stallbyggnaders spännvidd och kostnad samt vilket stomsystem som är mest ekonomiskt fördelaktigt. Kostnaderna i undersökningen innefattar enbart materialkostnader. Resultatet visar att kostnaderna ökar linjärt med den ökande spännvidden. De undersökta typfallens materialkostnader är relativt likvärdiga, men treledsramen i stål har den lägsta materialkostnaden för samtliga undersökta spännvidder. / The Swedish agriculture is developing towards fewer and larger farms. The growing business for the farmers results in an increased number of animals in livestock. This provides a greater need for agricultural buildings with open spaces and long spans. Länsstyrelsen has noted large variations in total construction costs for agricultural buildings in the country. Along with Länsstyrelsen Gävleborg developed an idea to explore how material costs are affected by various spans and different frame systems. The objective is that the study will result in a decision-making basis for new construction and reconstruction of agricultural buildings. Previous research and theories were examined and a number of site visits were made to increase knowledge in the field and determine which spans and frame system to be investigated. Parametric studies of four different scenarios of the agricultural buildings were made. Two cases in the study were constructed of glulam and two of steel. The parametric study is to report relationship between agricultural building spans and costs as well as which building system that is most economically advantageous. The cost of the survey includes only material costs. The result shows that the cost increases linearly with the increasing span. The material costs of the four tested scenarios are relatively equal, but the tapered steel frame has the lowest material cost for all tested spans.

In Sweden, the long-term climate goal is to achieve a net zero emission of greenhouse gases by 2045. At the same time, today the Swedish construction and property industry accounts for 21 percent of all greenhouse gas emissions, and the use of more climate-friendly materials can be part of the solution. The aim of the study is to analyze the climate impact and costs from a nine-floor building, where four different frame systems are compared. The nine-floor building is of a normal concrete frame with load-bearing steel columns in the outer walls. This building will then be compared against if the building was made of green climate-compensated concrete. As well as two hybrid solutions where the top three floors are dimensioned to a wooden frame and six floors in gray and green concrete below. In order to analyze the climate impact and costs, a life cycle analysis (LCA) and a life cycle cost analysis (LCC) will be carried out using the One Click LCA tool. In the life cycle analysis, the stages (A1-A5) will be studied and in the life cycle cost analysis the material costs (A1-A3) will be studied. The result from the life cycle analysis shows that the hybrid building with wood and green concrete has the lowest climate impact in terms of emissions of carbon dioxide equivalents (CO2e), followed by the building in green concrete. The result also shows that the hybrid building with wood and green concrete has approximately 43% lower climate impact compared to the gray concrete building which had the largest. The life cycle cost analysis shows that the gray concrete building has the lowest material costs, while the hybrid building with wood and green concrete has the highest. The conclusions of the study are that dimensioning a wooden frame meant thicker building parts compared to a concrete frame, which resulted in a smaller living area. But the hybrid buildings with three floors with a wooden frame, on the other hand, had a significantly smaller climate impact compared to the respective concrete building.