Secondary - Secondary Bracing
(Revised: 01/21/2021)

Secondary Bracing (8 1/2", 10", 11 1/2"):

Typical Roof and Wall Channel Brace Usage (Roof shown) CPBA CPBB CPBC	Mark Number = Length = Drop Pin = Endcap = Secondary Limitations = CPBA Minimum Length = CPBA Maximum Length = CPBB Minimum Length = CPBB Maximum Length = CPBC Minimum Length = CPBC Maximum Length =	CPBA------ (ffiiss) - 0 Tabs CPBB------ (ffiiss) - 1 Tab CPBC------ (ffiiss) - 2 Tabs Sec. Space - 3/16 - 3/16" + 1 7/8" for each tab 097556 544015 8 1/2", 10", 11 1/2" Only 6 5/8" 12'-2 7/8" 8 1/2" 12’-4 3/4" 10 3/8” 12’-6 5/8”
	Length calculation may produce a result slightly different than Vision. Use Vision calculations for CPB_ length.

Typical PBA Usage (Roof Only) Purlin Brace Assembly (BR09K8) Not at a Frame Purlin Brace Assembly (BR09K2) At a Frame Insulated Roof Panel Not at a Frame	Mark Number = Length = Nuts = Fastener = Purlin Limitations = Minimum Length = Maximum Length =	PBA---- (ffii) Purlin Space + 2" (Round up to nearest inch) 47120 (2 per PBA) 097352 Scrubolt 097267 Scrubolt Nut 8 1/2", 10", 11 1/2" Only 1'-2" 5'-6"
	Length calculation may produce a result slightly different than Vision. Use Vision calculations for PBA_ length.

Channel Purlin Brace

(BR09PK)

Ridge

Mark Number =

Length =

Drop Pin =

Purlin Limitations =

Minimum Length =

Maximum Length =

Maximum Roof Pitch =

CPBR------- (pffiiss)

Ridge Purlin Space + 5"

- Rise of 1 1/2" at 8 1/2"

- Rise of 1 1/2" at 10"

- Rise of 3" at 11 1/2"

(2) 097556

8 1/2", 10", 11 1/2" Only

8 1/2"

5'-5 3/4"

4:12

Pitch Code	Max : 12
A	0.874
B	1.249
C	2.249
D	3.249
E	4.000

High Slope Ridge Assembly (BR09M9)

Ridge

Mark Number =

1/2" x 1 1/2" A325 Bolts =

Roof Pitch =

HSRA-------(ccfiiss)

(4) 49080

> 4:12

Typical Roof and Wall Channel Brace Connections Channel Brace (BR09PH) Continuous Channel Brace (BR09JG) Terminating (Channel Brace Lines Up With Slots in the Purlin/Girt Web) Channel Brace (BR09JG) Terminating (Channel Brace Does Not Line Up with Slots in the Purlin/Girt Web) Channel Brace (BR09JR) Terminating High Side Channel Brace at Base (BRR008)

Drop Pin = Endcap = Fastener =

097556 544015 55307

Roof Systems using an R Factor Design
(VSRII Roofs, 8 1/2" & 11 1/2" Purlins only)

(Only in Purlin Spaces required by Design)

Roof Systems using Discrete Bracing

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Key Hole Calculation

Note: Channel Purlin Bracing is not required if the Corner Zone Jamb is within 18” of the Channel Purlin Bracing.

Channel Brace Rules: The user can specify up to 4 braces in a bay, if only 2 braces will fit because of the girt length then only 2 braces will be provided regardless of the user input. If 3 braces are specified, the purlins/girts are designed assuming braces on the left hand side of the bay. The “most common” girt on the wall is punched for the bracing. On the girts that are not the same length as the “most common” girt, keyhole punching will not be provided. Details (SEDs) are provided for attaching the brace with self drilling screws. For a brace to be generated the brace must be located on the detailed part. (Think at a gable, the upper most girt may be shorter than the run of girts below, the brace must fall on the detailed upper girt to be generated. Girt braces are not generated in the girt space between the floor and the first girt run unless there is only 1 run of girts on the wall. Face-to-face, back-to-back, face-to-back, and structural members are not to be punched for the purlin/girt bracing. Purlin/girt bracing will generate and need to be field attached with structural fasteners. Detailer to verify the quantity of 55307 at girts without keyhole punching and field attached Channel Braces. Channel Braces are not permitted for nested girts. Vision will generate an Edit Check message when this condition occurs and the designer must “engineer out” nested girts.