Calculation of the foundation of portal frame light steel structure industrial building

Industrial buildings of portal frame light steel structure present an advantage of light weight over industrial buildings of traditional concrete structure. But one difficulty involving the foundation design of portal frame light steel structure industrial building results from the excessively large eccentricity due to the light dead weight with the result that the normal method of foundation design may fail to ensure the required safety. Larger moment arising from the design and calculation of the foundation of several practical examples is overcome by the use of the calculation method of supplemented composing working condition. Considerations of selecting and optimizing the form of the foundation in the design of industrial buildings of light steel structure are discussed in detail from the point of design steel cost. Some general principles of the foundation form selection and construction measures in foundation design are also presented.