The H pole and F pole in communication line engineering are called by the layout of the pole, mast and equipment installation bracket and platform. The H pole is made up of two poles or mast side by side (the two vertical drawing that forms the capital letter H). The distance between the two poles must be decided according to the space needed for the installation of the equipment's support or platform. A bracket or platform is used for carrying out communication devices, such as power modules, transmission modules, integrated cabinets for distribution modules, and base station equipment. The scaffold or platform is erected between two poles or mast, which forms a horizontal road of capital letter H. This erection method is called the H rod. The H pole is generally higher than two poles or mast. If two are not generally high, plus scaffolds or platforms, they will form "H" poles. Similarly, the F pole is also called out. It is made up of a pole or a mast and two stents.