Abstract: This project for the Hangzhou Electronics Co., Ltd. through complex building, located in Hangzhou 3 Dunzhen, the building covers an area of 1510 m2, building area of 5239.8 m2, for the five-storey low-rise building. Fire-resistant construction grade two, six times the intensity of seismic fortification, for the selection of cast-in-place reinforced concrete frame structure, indoor floor elevation of ± 0.000, to represent absolute elevation of 5.000 m. Cast-in-place structure to the main office building of reinforced concrete frame structure. Calculated steps to select the 5-axis framework, the load calculation and cross-section estimate, calculated by using tiered vertical load of internal forces, are obtained through the D value method under wind load level of internal forces, and a negative combination of internal forces, Then select the most disadvantaged section design combination. In addition the design also includes the floor, staircases and continuous beam design. The project design based on a pile, mostly under the column for two, three caps. Key words: Selection of the design steps of calculation Based on design
