For class 1 and 2 members subject to axial tension load, only the alternative equation in Clause 4.8.2 is implemented. For class 1 and 2 members subject to axial compression load, only the alternative cross-section capacity equation of 4.8.3.2 is performed. The interaction requirements (Clause 4.8) of the Draft Amendments to BS5950 Structural Steelwork in Buildings. Part1:1990 has been adopted in RAM Frame. However, all member capacities and the specifications to calculate these capacities are taken from BS5950:Part1:1990, without modification. This includes the requirement that Mcy need not be restricted to 1.2Zy for the equations in Clause 4.8.3.3.2.

A flange section is considered an I-Section as opposed to an H-Section when the depth is larger than 1.2 times the Flange Width. This determines which buckling curve is selected from Table 25 for a flange section. Built up channels subject to compression are assumed to belong to strut table 27(c) per Table 25.

The spacing between connectors of a double angle is calculated to provide a minimum of three bays per Clause 4.7.13.1. The distance may also be controlled by Clause 4.7.9 (c), which requires the maximum slenderness of a main component to be less than 50. This requirement is referenced from Clause 4.7.13.1(d). No other provisions of Clause 4.7.9 (c) are implemented, as the double angle is not considered a battened section. Lamda is calculated based on this maximum allowable connector spacing and the end connection of the double angle as specified by the engineer (see previous discussion on the Criteria command) per Clause 4.7.10.3.

As described in the RAM Manager documentation the engineer can specify whether built-up flange sections are comprised of milled plate or flame cut plate. This designation affects the axial capacity of the flange sections as specified in footnote 2 of Table 25 in the BS 5950 specification.