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StiffWall® Boot

StiffWall_Boot_Close-up

StiffWall® Boots are a component of TSN's StiffWall System (x-braced shear walls), designed to carry loads concentrically from the point of applied loads to the foundation or other termination point, that utilizes light gage straps on both sides of the wall for shear resistance. StiffWall Boots provide the optimal cost-effective solution for shear wall connections.  Six configurations are available to meet project requirements (Light, Plus, Small, Medium, Transition and Large).  StiffWall Boots are sized to fit inside standard track and are available for all standard sizes.  The Steel Network will determine the actual bearing height the StiffWall Columns, which are delivered to the job site with Boots pre-attached at the top and bottom for fast installation (see StiffWall Column/Boot Assembly for more information).

Value:

  • Transfers the loads from the straps and columns through the floor system down to the foundation
  • Pre-installed on top & bottom of each Column by TSN
  • Fits into a standard (T) Section track
  • Designed and manufactured to meet the performance requirements of the project.
  • Only mill certified high strength steel is used.
  • Exceeds industry standards for sizes and loads.
  • Tested for multi-story application and capable of carrying loads present in 10 story buildings.
  • Meets or exceeds both strength and stiffness requirements of the applicable building code.
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Product Information
Material Composition
TSN_StiffWall_Boot_Base_Plate
Structural Steel Parts: ASTM A 572/A 572M, Grade 50 or equivalent (Min. Fy = 50 ksi, Min. Fu = 65 ksi). Coating Powder – Black or TSN approved equivalent.
TSN_StiffWall_Boot_Strap_Track
Cold-Formed Steel Parts: ASTM A 1003/A 1003M, ST50H or equivalent (Min. Fy = 50 ksi, Min. Fu = 65 ksi)
TSN_StiffWall_Boot_Bolts
Bolts: ASTM F3125 Grade A325

StiffWall Boots come pre-assembled with StiffWall Columns (see image on right). Please refer to the StiffWall product page for full system design and order information. Contact TSN technical support for design recommendations.

Boot Components

TSN_SW_Column_Boot_Assy

 

TSN_StiffWall_Boot_Base_Plate TSN_StiffWall_Boot_Strap_Track TSN_StiffWall_Boot_Bolts
StiffWall Base Plate
Strap Track
A325 Column Bolts

 

Please Note: Boot Kits may NOT be sold separately, as they are part of an engineered system.

StiffWall® Boot Capacity (kips)
Wall Light Plus Small / Medium / Transition Large
Width (in) Aspect Ratio Straps Tension Column Uplift Straps Tension Column Uplift Straps Tension Column Uplift Straps Tension Column Uplift
Vertical: Horizontal T1 T2 T1 T2 T1 T2 T1 T2
3.5 0.6:1 (30.96 deg.) 12.00 1.78 12.75 4.79 18.60 8.65 18.60 19.46
1:1 (45 deg.) 8.73 1.78 15.47 4.79 22.08 8.65 22.08 19.46
2:1 (63.5 deg.) 6.91 1.78 12.38 4.79 26.81 8.65 29.01 19.46
3.625 0.6:1 (30.96 deg.) 11.59 1.83 12.75 4.98 18.60 8.98 18.60 20.21
1:1 (45 deg.) 8.43 1.83 15.12 4.98 22.08 8.98 22.08 20.21
2:1 (63.5 deg.) 6.67 1.83 11.95 4.98 25.88 8.98 29.01 20.21
4 0.6:1 (30.96 deg.) 10.50 1.97 12.75 5.56 18.60 9.98 18.60 22.46
1:1 (45 deg.) 7.64 1.97 13.70 5.56 22.08 9.98 22.08 22.46
2:1 (63.5 deg.) 6.04 1.97 10.83 5.56 23.46 9.98 29.01 22.46
5.5 0.6:1 (30.96 deg.) 7.64 2.49 12.75 7.86 18.60 13.98 21.48 35.76
1:1 (45 deg.) 5.56 2.49 9.96 7.86 21.58 13.98 25.34 35.76
2:1 (63.5 deg.) 4.39 2.49 7.88 7.86 17.06 13.98 32.23 35.76
6 0.6:1 (30.96 deg.) 7.00 2.65 12.55 8.62 18.60 15.32 21.48 39.16
1:1 (45 deg.) 5.10 2.65 9.13 8.62 19.78 15.32 25.34 39.16
2:1 (63.5 deg.) 4.03 2.65 7.22 8.62 15.64 15.32 32.23 39.16
8 0.6:1 (30.96 deg.) 5.25 3.21 9.41 11.69 18.60 20.65 21.48 52.80
1:1 (45 deg.) 3.82 3.21 6.85 11.69 14.84 20.65 25.34 52.80
2:1 (63.5 deg.) 3.02 3.21 5.42 11.69 11.73 20.65 25.81 52.80

Notes

  • Allowable loads are based on analysis of loads and allowable stresses set by AISI S100-07 and AISC 2005 Spec.
  • Straps tension T1 is the summation of tension forces in the the two diagonal straps.
  • Load paths for straps tension and column uplift are independent in the boot connection and allowable loads T1 and T2 can be combined for the same boot.
  • Check combined tension and shear in anchor bolts due to applied T1 and T2 values as per AISC 2005 Specification, Sec. J3.7.
  • Allowable loads for wall aspect ratio other than listed can be interpolated, but not extrapolated.
  • Material Designation for cold-formed steel parts is ASTM A 1003/A 1003M, ST50H or equivalent (Min. Fy = 50 ksi, Min. Fu = 65 ksi).
  • Material Designation for structural steel parts is ASTM A 572/A 572M, Grade 50 or equivalent (Min. Fy = 50 ksi, Min. Fu = 65 ksi).
  • Fillet Weld Designation is E70XX Metal Arc or equivalent. Thickness as specified.
  • For seismic design with coefficient R > 3, consider connection special seismic requirements in AISI-Lateral Standard 2004.
TSN_T1-T2_Shear_Wall_Boot_Load

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.

StiffWall® Boots and the rest of TSN's StiffWall Shear Wall System Products 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.