The mast is a structure with a large height and a relatively small cross-section. Horizontal loads (especially wind loads) are the main basis for structural design. According to its structural form, it can be divided into self-standing tower structure and guyed mast structure.

Masts, also known as rooftop towers, are mainly erected on city rooftops.

Whether it is a vertical pole, a support pole, or an elevated structure, because it is built on a house, the mast itself does not need to be too high, so the cost is low