Once the Detailed analysis option is run, and, if the member complies with the code, all the concentrated force for the load case that turned out to be decisive during the verification are read. If, for instance, the load case DEAD1 turned out to be most exigent during member verification, then, all the concentrated forces covered by the load case will be read. If, however, a combination or code combination turned out to be decisive, it will read all the concentrated forces covered by the simple load cases included in the combination.
The decisive load case is automatically introduced into theAutomatic loads edit field. The automatically-recognized concentrated forces are visualized in the graphical viewer, together with the force number and its coordinates. The coordinate system beginning is assumed by default to be located in member beginning.
To verify if the concentrated forces are recognized correctly, click the Concentrated forcestab.
The program is set by default to automatic mode (the Loads/Automatic option), and the calculations will recognize the load cases that were formerly defined. All the external and internal forces are read for the current load case(s), and only the forces will be recognized during calculations.
To introduce a new load case, enter manual mode.
There is no possibility in the automatic mode to change the position of load application along an element, neither is it possible to modify its value. Therefore, the Positions and Value fields are inactive. You may change only the information concerning the bearing width (Bearing ss field) and the position with respect to beam height (Position field).
The default coordinates indicating the location of forces are defined in relative units. It is possible to introduce many forces that have the same coordinate within one load case.
To define other load cases for calculations, click theListbutton. Once the new load cases have been selected, the set of forces are updated according to the defined selection.
It is assumed that calculations will cover only the forces that result in web or flange compression.
All the forces are by default set to the top position (Forces/Position tab).
If a concentrated force is not transmitted locally (at a point) to the beam, but it is applied over a certain length one may define the length in the Forces / Bearing ss field.
To define the buckling length coefficient for the analyzed web see: Forces / Beta_w. The coefficient will be used if one decides to carry out the analysis of the ribbed web under the concentrated force in question (Verification / Web stability for compression). It is possible to select the most common buckling length coefficients from the list or to define a new value for the coefficient.