The standard specifications for Structural Concrete for Buildings, established in 1966 by the American Concrete Institute, is unsatisfactory in its form and its content. I would like to consider the Standard for two points of view: first, as a technical guide for the contractor and the architect to perform an efficient job and to stimulate progress in the concrete industry; secondly, as a legal code which specifies the duties and obligations between the two parties, the contractor and the owner. The stipulations must be clear and specific, based on facts rather than assumptions. I propose to replaced them as follows: "In cases where the average compressive strength of the cylinders is below the specified minimum compressive strength, the concrete in the structure represented by these results shall be considered defective. Such portions of the structure shall be subject to further test at the contractor's expense, as directed by the architect. Such test may be compression tests of cores and /or load test. Where load tests are impractical, tests shall be made on concrete in accordance with ASTM C42 and C39. In case these test are not satisfactory, the defective concrete shall be removed and replaced at the contractor's expense." A laboratory established and tested mix is not a guarantee that the concrete delivered to the site will have the required qualities of workability and strength. Testing and constant inspection are necessary. I would propose the following changes of Section 1602: tests on concrete; during the progress of work, compression tests shall be made in accordance with the "Standard Method of Making Compression Test Specimens of Concrete in the Field," ASTM C31. Test shall be made on laboratory control cylinders.