The sizing process of gates is complex, iterative and repetitive. With so many elements that depend of each other, it is difficult to know where to start when you don t have experience in the area. This essay presents the project of a vertical gate in a simple way. With this objective, a flowchart and a script are created and they can be utilized to design vertical gates that present similar configuration. The flowchart assists in the decision-making and serves as a guide to the sizing while the script facilitates and accelerates the reproduction of the calculations. The designed gate is 4.7 wide by 9.7 tall and is under the action of a hydrostatic pressure of up to 33.5 meters of water column. The following elements are designed analytically, with the help of the Brazilian technical standard ABNT-NBR8883: main beams, face plate, support beams and steel wheels. The wheels and main beams are positioned to withstand roughly the same load. The dimensioning is carried out with the objective of achieving acceptable stresses for accessible steels on the market. A safety coefficient of 1.5 of the yield limit was applied to the design. These stresses are compared with the obtained by the ANSYS software, which uses the finite element method. The simulation has the objective of verifying the effectiveness and the efficiency of the calculations utilized, in front of its simplicity. This simulation shows that both the analytical method and the Brazilian standard oversize the design, since the simulation’s stresses equate to an avarage of 48 percent of the stresses calculated using the references.