RISAFoundation - RISA Technologies

Design OptimizationDesign OptimizationRISAFoundation will optimize Concrete beams and slab reinforcement. The criteria used for this optimization are theselected design code and the Design Rules assigned to the beam or slab design strip/cut.The Member Design Rules Spreadsheet records the parameters for the optimization. Optimization is performed forminimum weight, taking into consideration any depth, width, rebar limitations, etc. Note that the design rules input is onelarge spreadsheet, thus all of your design rules will be in the same place. Note that the dimensional rules and thereinforcement rules are all a separate entity. They have no interaction with each other in the program. They are simply allinput into the same location. For example, your minimum member width rules will not be influenced by concrete beamreinforcement rules.You can assign the design rules graphically as you draw beams and design strips or later as a modification. Design rules forslab design cuts may only be applied via the Design Cuts Spreadsheet. See Modifying Beam Properties, Slabs - DesignStrips, and Slabs - Design Cuts for more information.For additional advice on this topic, please see the RISA News website: www.risanews.com. Type in Search keyword:Redesign.Design Rules - GeneralYou must assign a unique Label to the design rules. You then refer to the design rule by its label when assigning it to slabs orbeams. The Label column is displayed on all tabs of the spreadsheet.Max Bending and Shear CheckEnter the maximum bending and shear unity checks in the Max Bending Chk and Max Shear Chk columns of thespreadsheet. This should usually be specified as '1'. If you desire a larger factor of safety, provide a lower factor (i.e. '0.95').Concrete CoverThe last two columns, Top Cover and Bottom Cover, are used to specify the clear cover measured to the slab or beamflexural reinforcing steel. The units are listed in the column headers. Note that Side Cover will be entered on the subsequenttabs of the spreadsheet.26 RISAFoundation v4