Strip Based Slab Design Overwrites

Form: Strip Based Slab Design Overwrites

Use the Strip Based Slab Design Overwrites form to apply design overwrites to the selected strip object(s). The various areas on this form include the following:

Note: Design strips may be displayed in the active window by clicking the View menu > Set Display Options command and checking Design Strip Layer A, Design Strip Layer B, or Design Strip Layer Other on the Set View Options form.

• General. Specify the layer and design type using the options below:

• Strip Layer drop-down list. Select the layer with which the selected design strips should be associated.

• Strip Design Type drop-down list. Choose to deign the strip as a Column or Middle Strip.

• Design This Strip check box. Check this box if design should be performed for the selected strips.

• Ignore PT When Designing This Strip check box. Check this box to ignore post-tensioning during design.

• Rebar Material drop-down list. Select the rebar material to use in the design strip(s) from the drop-down list of previously defined materials. Rebar material may be defined, edited or reviewed by clicking the button to access the Define Materials form.

• Cover. Choose from the following options to specify the concrete cover over the rebar for the selected slab(s):

• From Preferences option. Select this option if the cover should be as set in the Design menu > Concrete Slab Design > View/Revise Preferences command to the outer layer and assumes that the inner layer is located directly inside the outer layer for both top and bottom rebar. This is the default setting.

• Specified to Center of Steel option. Select this option to explicitly locate the rebar by specifying the distance to the center of steel in the Top Cover and Bottom Cover edit boxes. Typically, these values will be different whether the selected design strip(s) is in the Layer A or Layer B direction.

• Reduced Live Load Factor edit box. Specify a factor to reduce the live load forces used in slab design; most codes allow for live loads to be reduced based on tributary area calculations. The resultant forces in the selected slab object will be multiplied by the Reduced Live Load Factor when used for design. The only forces affected will be those that result from load cases associated with load patterns with a type of REDUCIBLE LIVE, or load cases that have been user defined as REDUCIBLE LIVE using the Design button on the Load Case Data form.

Note: The default value for the Reduced Live Load Factor is 1, which means that there is no reduction; a value of 0.75 would mean that the forces are decreased by 25%.

See Also

Finite Element Based Slab Design Overwrites form

Access the Strip Based Slab Design Overwrites form as follows:

1. Select one or more strip object(s) to which the overwrites should be assigned.

2. Click the Design menu > Concrete Slab Design > View/Revise Flexural Design Overwrites > Strip Based command