The Natural Frequency of the structure of the building", meaning that the frequency of vibration of the structure, building or part of a building, each building has only wobbly under the freedom.
"The building structure" means a building that is part of the antenna beam slab or other parts which, by Tong condition can be considered an important stability strength of the building.
"The components of the building" means a portion of a building that, in addition to the building structure is anchored firmly to the building structure.