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Wall Bridging - Light Steel Framing Connectors

BuckleBridge
* Image of BuckleBridge®

TSN's bridging connections work together with almost any stud spacing to resist weak axis buckling and torsional rotation of members. Used in both interior and exterior applications, TSN's line of bridging products can save hours of installation time and thousands of dollars in a single project.

Quality:

  • Load-rated positive mechanical attachment at each stud
  • Utilizes only certified, 50ksi steel
  • Accommodate most wall stud spacing, including 8", 12", 16" & 24" centers

Value:

  • Fast installation, where no clamping or welding is required
  • Guide holes provided for quick and accurate fastener placement
  • TSN's bridging products work flawlessly together as a system
Downloads Download Technical data Tech Sheet |
Product Information
Fig1
 

Bridging for load bearing and curtain wall studs is needed to resist the following forces:

  1. Weak axis buckling induced by axial compression load.
  2. Torsion induced by wind load.

As axial compression and lateral wind loads are applied, wall studs react with weak axis buckling and torsional rotation. To offset these forces, a form of bridging is incorporated into the wall system. Bridging loads accumulate over the run of the wall, requiring transfer of lateral forces in bridging at columns or to the floor slab into the structural load path to the foundation.

AISI Wall Stud Design Standard (S211) and AISI Specification (S100) provide the load and stiffness requirements for bracing members due to the effects of axial compression load and wind load as given in the on the following tab. Contact TSN Technical Support (888) 474-4876 if further information is needed regarding wall bridging design.

Bridging Requirements
AISI Wall Stud Design Standard (S211) AISI Specification (S100)
Stud Axial Compression Load Capacity:
Bracing Load PBrace* = 0.02 x Stud Compression Load (PStud) x # of studs braced.
Load Capacity:
Bracing Load PBrace* = 0.01 x Stud Compression Load (PStud) x # of studs braced.

Stiffness Capacity:
Lateral Stiffness βBrace = 4 x Stud Nominal Axial Strength / Unbraced Length (for one row of bridging).

Lateral Stiffness βBrace = 6 x Stud Nominal Axial Strength / Unbraced Length (for two rows of bridging).

Wind Load Capacity:
Twist Load PL = 1.5 x Wind Load x Bridging Spacing x Stud Spacing x m(Shear Center Distance) / Stud Depth. Twist Moment M1 = PL x Stud Depth.
* Bracing forces accumulate over the run of the wall until anchored.
 
Bridging load bearing studs against torsion by wind.
Ref1
Ref3
 
Bridging load bearing studs against weak axis buckling.
Ref2
Ref4
Bridging Clip Chart: Design Wind Pressure, Stud Spacing and Maximum Bridging Spacing
Section 10psf 20psf 25psf
24" o.c. 16" o.c. 24" o.c. 16" o.c. 24" o.c.
5' 6' 7' 5' 6' 7' 5' 6' 7' 5' 6' 7' 5' 6' 7'
600S162-33, 33 ksi BC1 BC1 BC1 BC1 BC1 N/A BC3 BC600 N/A BC1 BC3 N/A BC600 N/A N/A
600S162-43, 33 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 N/A BC1 BC1 BC1 BC1 BC600 N/A
600S162-54, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC3 BC1 BC1 BC1 BC1 BC600 N/A
600S162-68, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC600 BC600 BC600
600S162-97, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC600 BC600 BC600
800S162-33, 33 ksi BC1 BC1 BC1 BC1 BC3 BC600 BC600 BC600 N/A BC3 BC600 BC600 BC600 N/A N/A
800S162-43, 33 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC600 BC600 BC600 BC1 BC600 BC600 BC600 BC600 N/A
800S162-54, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC3 BC600 BC600 BC1 BC3 BC600 BC600 BC600 BC600
800S162-68, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC3 BC600 BC1 BC1 BC3 BC600 BC600 BC600
800S162-97, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC600 BC600 BC600
600S200-33, 33 ksi BC1 BC1 BC1 BC1 BC3 BC3 BC3 BC3 N/A BC3 BC3 N/A BC3 BC800 N/A
600S200-43, 33 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC3 BC3 BC1 BC1 BC1 BC3 BC3 N/A
600S200-54, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC800 BC800 BC800
600S200-68, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC800 BC800 BC800
600S200-97, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC800 BC800 BC800
800S200-33, 33 ksi BC1 BC3 BC3 BC3 BC3 BC3 BC800 BC800 BC800 BC3 BC800 BC800 BC800 BC800 N/A
800S200-43, 33 ksi BC1 BC1 BC1 BC1 BC1 BC3 BC3 BC800 BC800 BC1 BC3 BC800 BC800 BC800 BC800
800S200-54, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC3 BC800 BC1 BC1 BC1 BC800 BC800 BC800
800S200-68, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC800 BC1 BC1 BC1 BC800 BC800 BC800
800S200-97, 50 ksi BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC1 BC800 BC1 BC1 BC1 BC800 BC800 BC800
 
Channel / Clip Bridging Chart: Design Wind Pressure and Unsupported Wall Height
Section 30psf 40psf 50psf
16" o.c. 24" o.c. 16" o.c. 24" o.c. 16" o.c.
5' 6' 7' 5' 6' 7' 5' 6' 7' 5' 6' 7' 5' 6' 7'
600S162-33, 33 ksi BC3 BC600 N/A BC600 N/A N/A BC600 N/A N/A N/A N/A N/A N/A N/A N/A
600S162-43, 33 ksi BC1 BC1 N/A BC600 N/A N/A BC600 BC600 N/A BC600 N/A N/A BC600 N/A N/A
600S162-54, 50 ksi BC1 BC1 BC3 BC600 BC600 N/A BC3 BC600 N/A BC600 N/A N/A BC600 BC600 N/A
600S162-68, 50 ksi BC1 BC1 BC1 BC600 BC600 N/A BC600 BC600 BC600 BC600 BC600 N/A BC600 BC600 N/A
600S162-97, 50 ksi BC1 BC1 BC1 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 N/A BC600 BC600 BC600
800S162-33, 33 ksi BC600 BC600 N/A BC600 N/A N/A BC600 N/A N/A N/A N/A N/A BC600 N/A N/A
800S162-43, 33 ksi BC600 BC600 BC600 BC600 BC600 N/A BC600 BC600 N/A BC600 N/A N/A BC600 BC600 N/A
800S162-54, 50 ksi BC3 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 N/A BC600 BC600 BC600
800S162-68, 50 ksi BC1 BC3 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600
800S162-97, 50 ksi BC1 BC1 BC1 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600 BC600
600S200-33, 33 ksi BC3 BC3 N/A BC800 N/A N/A BC800 N/A N/A BC800 N/A N/A BC800 N/A N/A
600S200-43, 33 ksi BC1 BC3 BC3 BC3 BC800 N/A BC3 BC800 N/A BC800 N/A N/A BC800 BC800 N/A
600S200-54, 50 ksi BC1 BC1 BC1 BC800 BC800 N/A BC800 BC800 BC800 BC800 BC800 N/A BC800 BC800 N/A
600S200-68, 50 ksi BC1 BC1 BC1 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 N/A BC800 BC800 BC800
600S200-97, 50 ksi BC1 BC1 BC1 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800
800S200-33, 33 ksi BC800 BC800 BC800 BC800 BC800 N/A BC800 BC800 N/A BC800 N/A N/A BC800 BC800 N/A
800S200-43, 33 ksi BC3 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 N/A BC800 BC800 BC800
800S200-54, 50 ksi BC1 BC3 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800
800S200-68, 50 ksi BC1 BC1 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800
800S200-97, 50 ksi BC1 BC1 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800 BC800
Notes:
  • Listed wind pressures represent calculated design wind pressure (1.0W based on 2009 IBC or 0.6W based on 2012 IBC).
  • Allowable pressures are limited by published test data allowable torsional moments for bridging elements.
  • Torsional moment acting on bridging elements is calculated as:
    M = 1.5 x Wind Pressure x Bridging Spacing x Stud Spacing x m (distance from stud web to shear center).
  • Wall height is assumed twice the bridging spacing.
  • BuckleBridge® stud spacing is fixed at 16".
  • Stud design is limited by its flexural strength calculated with torsional bracing assumed at the bridging spacing and kφ = 0 and deflection limit of L/360.
  • 20 psf and higher wind pressures have been multiplied by 0.7 for deflection determination, in accordance with footnote “f” of IBC table 1604.3. The 10 psf pressure has not been reduced for deflection checks.
 
Nomenclature:
  • BC1 - BridgeClip with (1) #10 screw fastener into bridging member.
  • BC3 - BridgeClip with (1) #10 screw fastener into bridging member and (2) #10 screw fasteners into the web of the stud.
  • BC600 - BridgeClip BC600 with (2) #10 screw fasteners into bridging member and (2) #10 screw fasteners into the web of the stud.
  • BC800 - BridgeClip BC800 with (2) #10 screw fasteners into bridging member and (2) #10 screw fasteners into the web of the stud.
BuckleBridge® Bridging Chart: Design Wind Pressure and Maximum Bridging Spacing
Section 20psf 25psf 30psf 40psf 50psf
5' 6' 7' 5' 6' 7' 5' 6' 7' 5' 6' 7' 5' 6' 7'
600S162-33, 33 ksi BKB BKB N/A BKB BKB N/A BKB N/A N/A BKB N/A N/A BKB N/A N/A
600S162-43, 33 ksi BKB BKB BKB BKB BKB N/A BKB BKB N/A BKB N/A N/A BKB N/A N/A
600S162-54, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB N/A BKB BKB N/A BKB N/A N/A
600S162-68, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB N/A
600S162-97, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB
600S200-33, 33 ksi BKB BKB BKB BKB BKB BKB BKB BKB N/A BKB N/A N/A BKB N/A N/A
600S200-43, 33 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB N/A BKB BKB N/A
600S200-54, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB
600S200-68, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB
600S200-97, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB
800S162-33, 33 ksi BKB BKB BKB BKB BKB N/A BKB BKB N/A BKB N/A N/A BKB N/A N/A
800S162-43, 33 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB N/A BKB N/A N/A
800S162-54, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB N/A
800S162-68, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB
800S162-97, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB
800S200-33, 33 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB N/A BKB N/A N/A
800S200-43, 33 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB
800S200-54, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB
800S200-68, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB
800S200-97, 50 ksi BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB BKB
 
Notes:
  • Listed wind pressures represent calculated design wind pressure (1.0W based on 2009 IBC or 0.6W based on 2012 IBC).
  • Allowable pressures are limited by published test data allowable torsional moments for bridging elements.
  • Torsional moment acting on bridging elements is calculated as:
    M = 1.5 x Wind Pressure x Bridging Spacing x Stud Spacing x m (distance from stud web to shear center).
  • Wall height is assumed twice the bridging spacing.
  • BuckleBridge® stud spacing is fixed at 16".
  • Stud design is limited by its flexural strength calculated with torsional bracing assumed at the bridging spacing and kφ = 0 and deflection limit of L/360.
  • 20 psf and higher wind pressures have been multiplied by 0.7 for deflection determination, in accordance with footnote “f” of IBC table 1604.3. The 10 psf pressure has not been reduced for deflection checks.
 
Nomenclature:
  • BKB - BuckleBridge with (1) #10 screw on alternate sides of the BuckleBridge at 3rd stud (48" o.c.) Use (2) #10 screws at end of wall run.
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TSN's Product Catalogs are an essential resource for the design of cold formed steel. Developed by Engineers, the catalogs contain design data for members connectors, and fasteners.

TSN's Wall Bridging Product Line can be found in the following Catalogs:

For a full list of our product catalogs, specification sections, inspection checklists, and research reports please click here.