The design total building area of a five storey office building is 5689.8 square meters, the total height of the building is 17.3 meters, divided into five floors, the standard floor height is 3.3 meters, the column grid is 7.2 × 7.2 meters, the indoor and outdoor height difference is 0.45 meters, the fire rating is II, the safety rating is II, and the seismic fortification intensity is 7 degrees. Class B buildings, with a durability period of 50 years, adopt a straight line type