Option>preference> concrete frame design ACI-2003. Define> material concrete, modify, f’c =4 ksi, fy=60ksi. Define > area section, modify, name= slab6. Thickness= 6”

Conventional design process is normally based on the ‘local’ structural elements (column, beam, floor slabs, wall, etc.) But theoretical and experimental studies have shown that structural systems cannot be considered to be a simple collection of individual elements. The responses of the structure is often more than the ‘sum’ of the responses of individual elements since

There are 3 main classes of preservatives Oily substances insoluble in water Water-soluble salts Salts carried in volatile solvent other than water. A) Oily Preservatives Coal-tar is the best known ►most widely used preservative Obtained from bituminous coal Available in many grades ► gives satisfactory results

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