The parametric limitations in Table 6.1 were determined from reported test data in the prequalification references. Only connections that are within these limits are prequalified.
For tapered members, the depth of the beam at the connection is used to determine the limiting span-to-depth ratio.
6.3.1 Beam Limitations
The beam size limitations in Table 6.1 are directly related to connection testing. Because many of the tested beam sections were built-up members, the limitations are in cross-section dimensions instead of rolled-beam designations. There is no evidence that modest deviations from these dimensions will result in significantly different performance.
Similar to RBS testing, most of the tested beam-column assemblies had configurations approximating beam span-to-depth ratios in the range of 8 to 10. However, it was judged reasonable to set the minimum span-to-depth ratio at 7 for SMF and 5 for IMF.
The protected zone requirements are based on test observations.
6.3.2 Column Limitations
Extended end-plate moment connections may be used only with rolled or built-up I-shaped sections or flanged cruciform sections and must be flange connected. There are no other specific column requirements for extended end-plate moment connections.