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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)

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 Kits

If field conditions preclude the use of pre-installed Column/Boot Assemblies, StiffWall Boots may be sold as "kits," not individual boots (there are four (4) boots per kit).

  • If the project contains 10 StiffWall shear walls, order 10 Boot Kits (not 40 Boot Kits).
  • There are 6 different Boot types available: Light (LT), Plus (PL), Small (SM), Medium (ME), Transition (TR), and Large (LG).

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TSN_StiffWall_Boot_Base_Plate TSN_StiffWall_Boot_Strap_Track TSN_StiffWall_Boot_Bolts
StiffWall Base Plate
Quantity: 4*
Strap Track
Quantity: 4
A325 Column Bolts
Quantity: TBD per Boot Type**
* A Transition Boot Kit contains 2 Medium Base Plates, 2 Transition Base Plates, 4 Strap Tracks, and required A325 Column Bolts.
** One bolt provided per hole into stud.
pdf icon Printable LT-PL Boot Installation Instructions
pdf icon Printable SM-LG Boot Installation Instructions
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® Boot and the rest of TSN's StiffWall Shear Wall System can be found in the following Catalogs:

Load_Bearing_Tech_Catalog_Cover

TSN Load Bearing Member
Technical Catalog

TSN Reduced Load Bearing Wall Member Catalog

TSN Load Bearing Member
Order Catalog

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