This paper is concerned with the out-of-date design criteria in the assumption of end boundary conditions in computer analysis and design of steel building frames in some sectors of heavy industry. The two major concerns are addressed: one is the use of pinned end for the steel column base plates whose details are fixed end, and the second is the use of pinned connection design of steel beam to steel column in lieu of using moment connection. A typical frame is shown for demonstration purposes. The typical connection details used are shown. The author presents the pinned and fixed connection definition with reference to AISC Specification for Structural Steel Buildings. Examples of actual pinned end and actual fixed end are shown with reference to actual structures. A simple structure of a single column traffic sign post with a cantilever beam at the top of the column was selected to demonstrate a fixed end column base and a beam to column moment connection. It is the aim of this paper to clarify this simple but significant concept of fixed connections of column base plates and moment connection of beam to column, which in turn will lead to significant savings in the construction of steel buildings.