large span curving roof roll forming machine is mounted on a trailer, forming a type of mobile factory that is easily towed to even the remotest construction sites when installing standing seam metal roofs or curved roof panels. An important aspect of this machine is that it can be transported anywhere in the world easily. Once the machine is delivered on site, it can be set up in minutes and turn coils of steel into structural. This K-Span roll forming machine is a portable rollformer, similar with ABM K-span building Machine MIC-120 and MIC-240. All the parts except for the decoiler are mounted on the mobile trailer.