Form: Punching Shear Design Overwrite, Punching Shear Specified Perimeter, Punching Shear User Specified Support/Load Size, Punching Shear Specified Openings
Use the Design menu > Punching Check Overwrites command to overwrite punching shear design parameters for a selected point object. This point may be at column, support, or load locations.
Select one or more point objects in the model datum plane and click the Design menu > Punching Check Overwrites command to access the Punching Shear Design Overwrites form.
Check Punching Shear: When Program Determined is selected, punching shear will be checked. If No is selected, the options listed below will not be available.
Location Type (SeeTooltip): Choose Auto from the drop-down list if the program is to determine the column location, otherwise choose Interior, Edge or Corner. Location affects the calculation of the allowable punching shear. A sketch illustrating the placement of the edges and corners will display by "hovering" the mouse cursor over the words Location Type.
Perimeter drop-down list
Auto. Select this option to have the program determine the perimeter distance used in the punching shear calculation.
Specified Perimeter. Select this option and click the button to input the perimeter coordinates using the Punching Shear Specified Perimeter form. If a segment is null (a line drawn and assigned the None property), it is not used in the perimeter calculation (e.g., at a slab edge).
Specified Support/Load Size. Select this option and click the button to input the support or load in the X and Y directions using the Punching Shear User Specified Support/Load Size form. The program automatically determines the punching shear perimeter from the values specified. Use the Counterclockwise Angle from the Global X Axis to Support/Load X Axis edit box to specify in degrees
Use Effective Depth drop-down list.
Auto. Select this option to have the program determine the effective slab depth of the punching shear perimeter.
Specified. Select this option and then specify the effective slab depth of the punching shear perimeter in the Use Effective Depth Value edit box.
Openings drop-down list.
Auto. Select this option to have the program determine if there are openings in the punching shear region.
Specified. Select this option and click the button to input the geometry for either rectangular or circular openings on the Punching Shear Specified Openings form. On that form, click in the Opening Shape column in the Opening Data area to select Rectangle or Circle from the drop-down list, and then input location and size values in the other column edit boxes. Add additional openings in the same manner. These openings are used only in the punching shear calculations; they do not appear in the model.
Reinforcement Allowed: Select No, Rebar Ties, or Stud Rails from the drop-down list depending on the type of reinforcement allowed. If No is selected, reinforcement spacing does not apply. If Stud Rails is selected, the reinforcement spacing is the spacing of the studs. If Rebar Ties is selected, the reinforcement spacing is the spacing of the single leg stirrups.
Reinforcement Pattern: If reinforcement is allowed, select Orthogonal or Radial from the drop-down list to specify the reinforcement pattern.
Reinforcement Fy: If reinforcement is allowed, specify the yield strength in the edit box.
Reinforcement Diameter: If reinforcement is allowed, specify the diameter in the edit box.
Reinforcement Spacing: If reinforcement is allowed, specify the spacing in the edit box.
Note: Point information can be accessed by expanding the Point Objects sub-node under the Objects node on the Model tab of the Model Explorer window.