Version 306

02-07-2025

Design

JSI Warning and Default JSI Limit

The default JSI (Joint Stress Index) Limit, which makes plate upgrades strive to keep plate JSIs below the limit, has been increased to 1. This value can be changed in the Plating Settings section of the Analysis Settings menu, and you'll see a warning for any plates that are passing checks but exceed the limit you've set.

Improved Reweb Truss Tool

The Reweb Truss tool in the Edit Truss menu now handles common cases without encountering an error much more often. It's the quickest way to add multiple webs at once and to make symmetrical webbing changes. Right-click on a profile line for the option to add another panel, move the white joints on the outer profile to change the webbing pattern, or select and delete all the webs and start over using the green joints as stitching points.

New Settings for Composite Action Analysis for Stacked Members

You can now control whether composite action is assumed for the analysis of stacked members through an Analysis Setting in the Other Settings section. When enabled, analysis treats stacked members as having greater bending stiffness than the sum of the stiffnesses of the layers. TPI 1 section 7.3.3.7 specifies how to do this for two-layer stacks with sufficient plating. This setting applies the same specification to all stacked members.

To help satisfy the composite action assumption, there is also a Plating Setting that lets you "Add Plates Along Stacks" at a specified interval (again, see TPI 1 section 7.3.3.7). If composite action is assumed in the analysis, but the max plate interval on the truss seems to conflict, you'll see a warning on the Truss Design Drawing:

WARNING: This truss's stacked members might not be fully plated at 30-inch intervals, but the analysis results assume composite action. See TPI 1 § 7.3.3.7 for more details.