This thesis deals with minimum reinforcement and crack width in concrete caused by compressiveforces. The report also describes the reinforcement's anchorage length and joint length. Concreteis a common building material for houses. To prevent cracks in the concrete that occur due totensile stresses, it is supplemented with crack reinforcement, which also distributes cracks intosmall fine cracks and maintains its function.Within the construction industry, there are rules and standards that are used to ensure the qualityand safety of buildings. The construction industry in Sweden has previously dimensioned basedon BBK and today according to Eurocode 2. The motive is to investigate which standardprovides the least amount of reinforcement. Another motive for the thesis work is toinvestigate whether it is possible to reduce the amount of reinforcement to reduce the climateimpact.The results from the survey show that the perception that BBK provides less minimumreinforcement holds true for thicker slabs. However, the calculations that the crack width iscalculated according to BBK are larger than Eurocode 2. When it comes to limiting the crackwidth, the results have shown that smaller reinforcement reduces crack width. Consequences ofthis are that there will be more reinforcement bars but less reinforcement amount, which meansthat less reinforcement needs to be manufactured. The result also shows that anchorage and jointlength can be reduced by up to 50% of the standard value used, which is one of the areas inwhich reinforcement consumption can be reduced.