A hall contains various types of connections. Some connect the purlin to the frame, others join two sections of profile, and others fix the panels to the supports. Each has a specific function and its own requirements. Replacing one fastener with a similar element can change the behaviour of the entire detail. Cold-formed profiles offer great prefabrication potential, but the benefits only appear when the connections are described as precisely as the sections themselves. A bolt in a purlin node does not perform the same function as a screw passing through a sandwich panel. They differ in the type of loads, the method of fixing and the service conditions. They must not be selected together solely on the basis of the visible sheet thickness. Every detail requires proper documentation.