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The inputs in the Displacement da for Deflection – Override Hold-down Properties.data group allow you to replace the vertical hold-down displacement components from with constant values for all hold-downs in the program. They also allow you to specify values for these components if they cannot be calculated or are not available from the hold-down database for a particular hold-down. A warning appears in the output if this situation occurs.
Elongation
If box is checked, the program uses the input value as the elongation for all hold-downs in the structure that have separate elongation/slippage, overriding the hold-down database value. If box is not checked, it uses the override value only when a value is not available from the database for the stud size that the hold-down is attached to. The problem can be avoided by ensuring that all of your hold-downs have at least one elongation entry that applies to all stud widths and depths.
Slippage
If box is checked, the program uses the input value as the nail slippage for all nailed hold-downs in the structure that have separate elongation/slippage, overriding the hold-down database value. If box is not checked, it uses the input value only when the force Vn on each nail is greater than the maximum allowed in SDPWS Table C4.2.2D. This avoids unrealistically high nail slippage values and correspondingly low rigidities; however, you should change the hold-down at that location to one that is within the limit on fastener loads
Displacement
If box is checked, the program uses the input value as the elongation for all hold-downs in the structure that have combined elongation/slippage, overriding the hold-down database value. If box is not checked, it uses the override value only when a value is not available from the database for the stud size that the hold-down is attached to. The problem can be avoided by ensuring that all of your hold-downs have at least one displacement entry that applies to all stud widths and depths
Shrinkage
If box is checked, the program uses the input value as the wood shrinkage value for all hold-downs in the structure, overriding the value calculated using moisture content and length subject to shrinkage on each floor.