One Truss Controls settings

Access these settings via Env Data > One Truss Controls. One Truss Controls let you apply certain settings to a group of selected trusses. See Apply One Truss Controls.

Field Descriptions
Setting Description
Default TC size (first and last segment) Default size for top chord on first and last segment
Default TC size (middle segments) Default size for top chord on middle segments
Default BC size Default size for bottom chord
Default Web size Default size for web size

Structural sheathing attached to TC

Select True if top chord of truss is sheathed with structural sheathing. Select False if not.

Approved sheathing attached to BC

Select True if bottom chord of truss is sheathed with structural sheathing; select False if not

Show optional purlins

Display purlin spacing on the Truss Design Drawing

Use purlins when spacing is > 2 feet Force purlins on the top and bottom chords when on-center spacing is changed to be larger than 2’. Also allows the bottom chord purlin spacing to be designed for the maximum spacing allowed for the materials used on the truss.

Use repetitive member factors

True allows the use of repetitive (or multiple) member factors in calculations; False does not. See Repetitive Members.

Green Lumber used

True provides analysis based on green lumber.

Treated Lumber used

True provides analysis based on treated lumber.

Wet service condition

True provides analysis based on lumber being used in a wet location.

Lumber is seasoned

True provides analysis based on seasoned lumber; False will not use these calculations.

Lumber has been incised

Set value to True when reduction tolerance for lumber values used in incised wood, such as pressure treated or fire retardant treatment; set as False otherwise.

Temperature range; <= 100; 100 to 125; > 125

Input temperature value based on what the sustained temperature in the attic (or floor space) is expected to be. There are three ranges of temperatures, Low (<=100), Medium (between 100 and 125) and High (> 125) degrees. Each range requires a different reduction in the lumber values, per TPI and NDS.

Suppress plating for moment

True suppresses plating for moment; False does not.

Wall Top Plate Material - USA Defines wall top plate material (US)
Wall Top Plate Material - Canada Defines wall top plate material (Canada)
Use Cb factor for wall Turn Cb factor on or off. If this option is enabled, calculations for the wall use the bearing area Cb increase factor based on TPI 7.3.8.2, using only the wall width as the calculation factor, and without regard to whether the bearing is at the "end" of a member or not. If this option is not checked, the Cb factor will be taken as 1.00 and not used to increase the allowable.
Solid blocking at bearings

TPI 1-2014 has added a 0.3 factor to one of the bearing perpendicular to grain checks. As a result, this check is more limiting and may have an effect on deeper members (2x8 and larger). Setting this to True may limit this check to a warning. Setting this to False will result in an error, should this check be exceeded. (TPI 7.3.8.1 Design Requirements).

Plate roller - single pass used True supports customers who fabricate trusses using a single pass, full embedment roller press.
Auto-add drag load to Shear Panel? When set to True, the Shear Panel checkbox on the Drag Load dialog is selected, to apply the specified drag load, when the SP command is used on the TC profile line. When set to False, and the SP command is used on the TC profile line, the drag Load Shear Panel option is not enabled, but you can manually set it by opening the Drag Load dialog.
Truss is bid as girder if user point load is > Truss is considered a girder if user point load is greater than the number specified. Minimum value is 0, maximum is 99999.00000, default is 200. This setting also determines whether a truss is colored as a girder. See Define Truss Type Display Colors.
Truss is bid as girder if user PLF is > Truss is considered a girder if user PLF is greater than the number specified. Minimum value is 0, maximum is 99999.00000, default is 50. This setting also determines whether a truss is colored as a girder. See Define Truss Type Display Colors.

Canada: Use TPIC Long Span Truss Design Considerations

 For Canadian customers, True enables use of TPIC long span truss design considerations
Flip truss for production

When set to True, you can flip a truss's left and right ends for production. This is useful for mono trusses, where you may want the tall heel on the left side.

When flipped:

  • Truss reports from Truss Studio (.RGT reports) display images of the truss as flipped except for engineering drawing reports.

  • Layout reports remain unchanged.

  • Layout truss preview image remains unchanged.

  • CS Director displays all images of the truss flipped.

  • CS Director displays all information about the truss flipped, such as. Left/Right heel heights.

  • CS Director saw and table outputs reflect the flipped truss.

  • The message Flip Truss for Production displays below the truss.

  • This option must be set to True when using the Flip Trusses feature in Director. See Flip Trusses for Production.