Concrete Cover For Columns Aci

Cover is defined as the distance between the outer surface of the concrete to the inserted reinforcement.

Concrete cover for columns aci.

Sider increased concrete cover less permeable concrete or other pro tective measures. Section 4 is the longest part of aci 117 covering tolerances for cast in place concrete for buildings including walls floors and slabs. Aci 318r ref 2 recommends a minimum concre t e cover for corrosion protection in c a s t i n place construction of 2 inches in walls and slabs and 21 2 inches for other members. It is desired to set minimum thickness of concrete cover as 65mm to account for possible construction errors and hence make sure that 50mm cover thickness is achieved.

The concrete column module designs concrete rectangular or circular columns against axial uniaxial or biaxial bending as well as shear based on aci 318 02 05 08 11 14 code provisions. The rcc member which is cast against the earth and exposed to earth the concrete cover should be not less than 3 inches. Depending on the shear strength requirements the required tie spacing may be less than that in the figure. The program generates exact not approximate or empirical p mx my interaction surfaces for all sections according to user specified design criteria.

The american concrete institute aci is a leading authority and resource worldwide for the development and distribution of consensus based standards technical resources educational programs certification programs and proven expertise for individuals and organizations involved in concrete design construction and materials who share a commitment to pursuing the best use of concrete. For beams and columns this is a sig nificant increase in cover since re. The maximum deviation is defined for the plumbness of walls columns and openings. Concrete which is not cast against earth but exposed to earth or weather the concrete cover should be.

For example for reinforced concrete member subjected to sea water the aci code specifies that thickness of concrete cover should be at least 50mm. Here i ll discuss the minimum concrete cover as specified in aci code. Concrete cover ing is the cover provided for the reinforcement in reinforced cement concrete. Tie spacing requirements for reinforced concrete columns in buildings assigned to sdc a and b are given in figure 3.

The clear spacing between ties must be at least 4 3 d agg. Maximum deviation is defined for horizontal and vertical faces. Aci clear cover requirements.