Design of a building consists of several stages including the optimization of the structure. The difficulty level of structural design depends on the size of the building, the complexity of the plan and the details are used in the construction. For multi-storey buildings and varying plan arrangements, elevations and component dimensions, the calculation needs to be considered in many aspects with high calculation complexity. Therefore we need tool that can be used to speed up the calculations, so that design efficiency can be obtained faster and get the geometric optimization. In this webinar and short course activity, the computer aids program used is ETABS, which is software specifically used for building design, especially multi-story buildings. Participants in the activity are graduates who have been and will be involved in the world of construction design, especially buildings. The form of short course is to do online tutorials on the design of multi-storey reinforced concrete structures. This service activity partner is the Association of Construction Work Safety and Health Experts (A2K4) in the South Sumatra region which has been involved in various training and certification activities in various fields of construction work. The results of the activity showed that all participants stated that the activities carried out were very important because in the increasingly complex world of work it required mastery of software in helping the work process
