The secondary beam design results and the failure conditions of the steel beams are displayed in the Secondary Beams dialog. The secondary beams dialog displays PMM ratios, combinations and deflection results. In the “ Details ” tab, material and section properties, internal force values, axial compressive strength, bending moment strength in strong and weak axis, design variables and lateral stiffness coefficients (K coefficient, L factor etc.) and PMM ratio are displayed.
If composite slab is defined for secondary beams, secondary beams become composite beams and are evaluated according to composite beam design criteria.
Location of Secondary Beams Dialog
After the analysis is done, you can access it by clicking the Secondary Beam command under the Steel Design heading in the ribbon menu Analysis and Design tab .
It is the name of the secondary steel beam in the plan.
It is the section used in the secondary steel beam.
It is the material used in steel beam.
It is the ratio of requirement to section capacity (PMM Ratio = Need/Capacity).
It is the load combination that produces the most unfavorable PMM ratio.
It is the ratio of the shear force in the major direction of the section to the capacity in the major direction.
It is the load combination that produces the most unfavorable stress ratio in the major direction.
It is the ratio of the shear force in the minor direction of the section to the capacity in the minor direction.
It is the load combination that produces the most negative stress ratio in the minor direction.
It is an information box whose sign changes according to the presence or absence of negativity in the cross section.
It is the deflection value made by the secondary steel beam.
It is the value of the maximum allowable deflection in the secondary steel beam.
It is an information box whose sign changes depending on whether the deflection limit is exceeded or not.
Design details are shown in detail.
The cursor moves to the previous line.
The cursor goes to the next line.
It saves the changes made and closes the dialog.
Closes the dialog without saving the changes made.
The summary information about the line where the cursor is located is given in the name of the dialog in story, pose format.
For example, BASE STORY, SB008
Using the Shift key
In this tab, you can select more than one row with the Shift key, enter a value by double-clicking any cell whose value is open to change, and make that value apply to all selected rows.
Using the Ctrl key
Ctrl key selects the lines in between one by one.
It is the part where the name and geometric properties of the section take place.
The properties of the steel material used in the section are listed.
Forces and moments
Internal forces occurring in the element, belonging to the selected load combination, are shown in this section.
The load combination is selected.
The requirement / capacity ratio in the cross section of the selected load combination is displayed.
The shear capacity ratio of the steel secondary beam is shown.
Axial force and biaxial bending check
The axial capacity and moment capacity ratios of the steel secondary beam are shown.
K factor: It is the effective length coefficient used in calculations.