The aim of this research is to identify the factors that affect the spreading of steel constructions in Jordan, and classify these critical factors into understandable groups for whom would participate in this type of projects and arrange it according to its importance, so this research is important because no one has addressed this subject before in Jordan. All the informations were analyzed by statistical basis that includes the mean value, standard deviation and test failure indicator to determine the critical factors and weather to accept or reject the hypothesis. Nineteen factors were identified from the references, researches and interviews and they were divided into four groups. Two hundred and forty questionnaires were handed and one hundred fifty eight were filled and that equals 66%. Seven factors were taken into consideration as critical factors with different levels of effects. And they are (1) nonacceptance of the society of steel construction projects, (2) High cost of steel construction projects, (3) No tax exemption for residential and commercial steel constructions compared with industrial constructions, (4) Lack of specialized labor, (5) Lack of specialized companies in the field of steel constructions, (6) Lack of engineers specialized in steel constructions and (7) Lack of knowledge in international codes. These factors are belonging to three groups, namely, factors related to manufacturing and installation, factors related to human competencies, and factors related to external issues Two groups were considered to have the major effect on the speeding of steel constructions in Jordan, but the last group which is factors related to manufacturing and installation had one factor it was excluded. VI Finally, some results and recommendations were mentioned that would help in the spreading of steel constructions in Jordan.