![]() When bolt groups are subjected to shear loads that are eccentric to the centroid of the bolt group, then bolt group eccentricity is introduced. That is because the larger values are given directly in AISC specification table J3.2 without regard to bolt size. This was ignored for AISC even though it is unconservative. This is enforced for the CSA S16-09 and the CSA S16-14 codes, but is NOT enforced for the AISC codes. Bolts up to an inch in diameter have a strength of 120 ksi, larger bolts have a strength of 105 ksi. When bolts are designated with a material property of A325, the bolt strength in the ASTM varies based on the bolt diameter. The material properties of metric bolts are not exactly equal to the imperial ASTM with the same designation as there is as much as a 0.5% difference between 120 or 150 ksi used in the imperial ASTMs and the 830 or 1035 MPa used in the metric ones. Metric bolt sizes are only available when using A325M or A490M. The following ASTM bolt material designations are available in RISAConnection: These bolts checks are common to many different connection types.
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