Member Check Report

The Member Check report is created when you choose Member Check from the Compute menu. For sections, you must enter the member check parameters and loads. For an analysis, you must select the member locations to perform the check(s).

This report consists of a summary of the parameters, the loads (total or entered, applied, and strength), and the interaction equations for combined axial and bending, and combined bending and shear.

For section member checks, 'Applied' loads are the same as the 'Entered' loads except additional moments will occur with axial load eccentricities, measured from the point of application to the centroid of the effective section. For the 2016 and later editions of AISI, moment amplifiers for P-δ effects are incorporated into the 'Applied' loads for beam-columns, unless Mx and My were specified as already including the P-δ effects. Additionally, angle sections might have an extra moment of PL/1000 applied as required by the Specification.

For analysis member checks, `Total' loads are those determined from the analysis force and moment distribution, and are applied to all members that exist at the location being checked. 'Applied' loads are the portions of the 'Total' loads seen by the member being checked. For axial loads, this is proportioned by the full section area. For bending and shear loads, this is proportioned by the full section moment of inertia. These loads may also include adjustments for eccentricities, as stated above for section member checks.

The 'Strength' values are the design strengths for the section computed according to the selected specification. Global column buckling and lateral-torsional buckling stresses are calculated using elastic theory if that option is chosen.

The interaction equations for combined axial load and bending and combined bending and shear are shown. Note that the combined bending and shear equation is for unreinforced webs. If torsion is included in the member check, a separate unity check is shown. For biaxial bending or non-symmetric sections, CFS uses a rational extension of the provisions as described in the AISI Commentary. See also Torsion Design.

If the section is built-up from two or more parts and the direction of applied shear causes shear flow between parts, the magnitude of shear flow is summarized. For three or more parts, the shear flow for each part is shown which is the total shear flow for all the connections between that part and the other parts, and the sum of these shear flows for all parts is zero.