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The program includes an editor to view and modify the hold-down data. This editor should be used to update hold-downs for newly published product information from the hold-down manufacturer. It can be also used to add new hold-downs.
Access
The database editor is accessed from the following locations:
Context sensitive help
Each of the input controls within the database editor has context-sensitive help, explaining its purpose and use. If you click on the question mark in the upper left hand corner of the view, then on the input control a small yellow box appears with the description of the item.
The following are brief descriptions of the input fields within the box; for more details, use the context-sensitive help in the program.
Hold-down Selection Controls
The Hold-down selector, New and Delete buttons, and Default… checkbox are used to control the current hold-down being edited.
Hold-down Selector
The hold-down selection dropdown is used to both select the hold-down for viewing and editing properties, to name a new hold-down, or to rename the hold-down by typing over the existing name. It sorts the hold-downs from the database alphabetically.
New
Changes the input mode to refer a new hold-down being created rather than an existing one being edited.
Delete
Used to delete the currently selected hold-down from the database. Must delete incomplete entries before exiting box.
Default hold-down in Shearwalls
Indicates that this hold-down is the one that is used when new walls are created in Shearwalls.
Vertical Bolt ( add’l elongation)
This group pertains to the anchor bolt which connects the upper hold-down bracket or strap to lower bracket or strap, or to the foundation or some other anchoring mechanism.
No/with anchor bolt
Radio buttons allow you to indicate that the connection does not have an anchor bolt, disabling the other controls and causing the program to dispense with anchor bolt calculations.
Diameter
Shank diameter of anchor bolt, used in tensile strength and elongation calculation, – can select from list or enter custom size.
Max Length for Given Elongation
The length of anchor rod the manufacturer used in tests to determine the displacement or elongation, usually found in a note in the product literature or evaluation reports. Elongation for any excess bolt length is calculated separately by Shearwalls.
Options
There are checkboxes in the view for the following options:
Shrinkage Compensating Device
If hold-down a mechanical device to adjust for the shrinkage of the perpendicular-to-grain wood between the extreme hold-down fasteners.
Always use Elongation at Maximum Capacity
A checkbox is used to implement the choices described in Method of Determining Displacement in 1c, above.
Displacement
This Data Group allows you to enter different hold-down capacities and/or displacements depending on stud width, thickness, and species group.
Elongation/Displacement List box
This box allows you to replicate the tables that appear in the hold-down product literature that have different hold-down capacities and/or displacements for each stud species, thickness and/or width.
The values apply to only one bracket in a two-bracket hold-down.
All
Entering the word “All” means that the capacity and displacement applies to all values of the thickness or width width of the thickness or depth.
New
Creates a new record corresponding to a line in the table of product information.
Delete
Delete an entire record consisting of one line of the Displacement table. You must delete any incomplete lines before exiting the dialog.
Note
For any line in the table, you can enter a note corresponding to the one that appears in the product literature and/or evaluation report to show in the design results any further restrictions on the use of the hold-down, such as on the wood grade or specific gravity.