Roof Secondary

(Revised: 12/11/13)

The Roof Secondary screen is used to define the typical secondary spacing and allows additional Secondary Options to be defined.

The standard secondary product spacing varies per panel and trim product conditions. The system will determine these standards automatically.

Purlins:

Shape

From this drop list, select the secondary shape of the active Secondary Member(s).

The list is based on valid shapes for the secondary location and purpose.

Depth

From this drop list, select the secondary depth of the active Secondary Member(s).

A 7” or 8 1/2" depth is common for 25' bays, but other depths are also available.

For larger bays, a deeper secondary member may be desired or required to design correctly.

Lap Type

From this drop list, select the secondary lap of the Secondary Member(s).

The list is displays all possible options, but the system may override this selection when specific building conditions exist.

Standard Spacing

This checkbox enables the secondary spacing dimension edit box for the intermediate purlin space by deselecting the checkbox. The dimension entered will override the standard dimensions.

„ Notes:

The standard secondary product spacing varies per panel and trim product conditions. The system will determine these standards automatically.

The standard intermediate space is 5'-0'' for most conditions. It may be reduced for specific loading conditions.

Use caution when revising Purlin Spaces.

Low Eave / High Eave:

Shape

From this drop list, select the secondary shape of the active Secondary Member(s).

The list is based on valid shapes for the secondary location and purpose.

Lap Type

From this drop list, select the secondary lap of the Secondary Member(s).

The list is displays all possible options, but the system may override this selection when specific building conditions exist.

Clips:

Connection

This droplist overrides the standard purlin connections to the rafter by requiring the use of clips.

„ Notes:

The standard secondary connection is "No Clips", the purlins bolt directly to the Rafter. If Clips are required for design reasons or manufacturing limitations, they will automatically be generated.

Purlin Bracing (Discrete Bracing) options:

Not Required

Select this check box if Erection Channel Purlin Braces are NOT desired unless required by Design.

Required for Erection

Select this check box if Erection Channel Purlin Braces are desired.

Erection Channel Purlin Braces will be located based on bay spacing, member length, and design requirements. A maximum of 4 Channel Purlin Braces per bay can be supplied.

Canadian Requirements

Select this check box if Channel Purlin Braces need to be designed per Canadian Building code.

Group Thickness:

Group Thickness

This checkbox will cause similar secondary shapes in each bay of a roof surface to be the same gage based on the thickest material required for the bay and surface.