Recommended LRFD Minimum Flexural Reinforcement Requirements (2010) / Chapter Skim
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77 CHAPTER 4 CONCLUSIONS AND SUGGESTED RESEARCH 4.1 CONCLUSIONS Recommended revisions to the LRFD specifications and commentary are proposed for the rational design of minimum reinforcement to prevent brittle failure of concrete members. These revisions are based on the research provided in this report including the observed response of lightly reinforced and prestressed concrete members, and review of methods specified in US and international codes.
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78 4. Modulus-of-rupture test units are 4 to 6 inches deep and moist cured until testing.
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79 4.1.3 Conclusions on the Parametric Study Of the four methods evaluated as part of this study two can be considered Strength methods and the other two are Prescribed Area methods. These methods are based on providing nominal strength in excess, by an acceptable margin, of the flexural cracking strength.
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