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StiffClip® CL

The StiffClip® CL series’ unique design allows for the connection of steel studs to the building’s structure by incorporating stiffened legs of a 90o angle to increase bending strength. StiffClip CL resists vertical, horizontal, and torsional loads. The allowable design load table is based on the use of StiffClip as it is attached to various steel stud wall material thicknesses and yield strengths. Allowable loads consider loads on the clip and screw fasteners to the stud web. Pre-drilled holes for attachments to both deck and stud provide installers with increased efficiency.

The designed attachment of StiffClip to the primary structure is dependent upon the base material’s properties (e.g. steel or concrete) and the design configuration.

Value

  • Guide holes for connections to stud and deck
  • Stiffeners for additional strength
  • Utilizes only certified, 50ksi steel
  • Reduces material (replaces heavy steel angles)
  • Extensively tested

StiffClip CL

US Patent #7,533,508

Downloads: Download Technical data Tech Sheet | Download drawing file DWG | Download BIM data BIM |

StiffClip CL(H) Application

StiffClip® CL(H)

Material Composition

68mil: ASTM A1003/A1003M Structural Grade 50 (340) Type H, ST50H (ST340H): 50ksi (340MPa) minimum yield strength, 65ksi (450MPa) minimum tensile strength, 68mil minimum thickness (14 gauge, 0.0713” design thickness) with ASTM A653/A653M G90 (Z275) hot dipped galvanized coating.

118mil: ASTM A1003/A1003M Structural Grade 50 (340) Type H, ST50H (ST340H): 50ksi (340MPa) minimum yield strength, 65ksi (450MPa) minimum tensile strength, 118mil minimum thickness (10 gauge, 0.1242” design thickness) with ASTM A653/A653M G90 (Z275) hot dipped galvanized coating.

“H” Plate: ASTM A27/A27M Grade 65-35 (450-240): 35ksi (240MPa) minimum yield strength, 65ksi (450MPa) minimum tensile strength, ½” minimum thickness with ASTM B633 Zinc Plating.

The attachment of StiffClip to the primary structure may be made with a PAF, screw/bolt anchors or weld and is dependent upon the base material (steel or concrete) and the design configuration.

  1. Place StiffClip CL at bottom of stud.
  2. Attach clip to deck with approved anchor.
  3. Secure clip to stud with required amount of symmetrically placed #12 screw fasteners.
  4. If the (H) Piece is used, secure to clip with approved anchor to deck.

pdf icon Printable Installation Instructions

Order Information

Designation Qty/Box Lbs/Box Qty/Skid Lbs/Skid
CL362/400-68 50 16 4,500 1,440
CL362/400-118 50 29 4,500 2,610
CL600-68 50 25 4,500 2,250
CL600-118 50 41 2,250 1,980
CL800-68 50 36 2,250 1,575
CL800-118 50 60 2,250 2,700
CL (H) Plate 50 24 4,500 2,430

TSN_StiffClip_CL_Dimensions_SideAngleTSN_StiffClip_CL_Dimensions

Nomenclature

To specify Stiff Clip CL on drawings, multiply stud depth by 100, followed by the appropriate material thickness, based on strength required (see technical sheet for load tables). The Stiff Clip CL118(H) utilizes a plate in the 1½” leg (shown in application image).

Example: 6” stud, uplift load of 650lbs.
Designate: StiffClip® CL600-68.

StiffClip® CL362/400, Recommended Allowable Load: F1, F2, F3 (lbs) & M1 (in-lbs)
Stud CL362/400-68 CL362/400-118 CL362/400-118 (H)
Thickness Mils (ga) Yield Strength (ksi) 4 Screws, Pattern 1 4 Screws, Pattern 1 9 Screws, Pattern 2
F1 F2 F3 M1 F1 F2 F3 M1 F1 F2 F3 M1
33 (20) 33 191 535 754 1,108 191 535 754 1,108 286 980 1,696 1,653
33 (20) 50 275 773 1,089 1,601 275 773 1,089 1,601 413 1,415 2,450 2,388
43 (18) 33 248 796 1,122 1,649 248 796 1,122 1,649 373 1,458 2,524 2,460
43 (18) 50 359 1,150 1,151 1,804 359 1,150 1,620 2,383 538 2,107 3,646 3,554
54 (16) 33 312 1,120 1,151 1,804 312 1,120 1,577 2,319 468 2,050 3,548 3,458
54 (16) 50 450 1,617 1,151 1,804 450 1,617 2,225 3,350 676 2,961 5,126 4,996
68 (14) 50 567 1,917 1,151 1,804 567 2,287 2,225 3,936 851 4,187 5,713 6,716
97 (12) 50 809 1,917 1,151 1,804 809 2,411 2,225 3,936 1,214 4,415 5,713 6,716
118 (10) 50 856 1,917 1,151 1,804 856 2,411 2,225 3,936 1,284 4,415 5,713 6,716
Maximum Allowable Clip Load 1,416 1,917 1,151 1,804 2,423 4,107 2,225 3,936 2,598 4,978 5,713 6,716
StiffClip® CL600, Recommended Allowable Load: F1, F2, F3 (lbs) & M1 (in-lbs)
Stud CL600-68 CL600-118 CL600-118 (H)
Thickness Mils (ga) Yield Strength (ksi) 6 Screws, Pattern 3 6 Screws, Pattern 3 10 Screws, Pattern 4
F1 F2 F3 M1 F1 F2 F3 M1 F1 F2 F3 M1
33 (20) 33 286 874 1,130 1,713 286 874 1,130 1,713 381 1,481 1,884 3,140
33 (20) 50 413 1,263 1,207 2,475 413 1,263 1,633 2,475 550 2,139 2,722 4,537
43 (18) 33 373 1,301 1,207 2,549 373 1,301 1,682 2,549 497 2,204 2,804 4,673
43 (18) 50 538 1,880 1,207 3,110 538 1,880 2,225 3,683 718 3,184 4,051 6,222
54 (16) 33 468 1,830 1,207 3,110 468 1,829 2,225 3,584 624 3,099 3,943 6,222
54 (16) 50 676 2,510 1,207 3,110 676 2,642 2,225 5,177 901 4,476 5,695 6,222
68 (14) 50 851 2,510 1,207 3,110 851 3,736 2,225 5,702 1,134 6,329 6,007 6,222
97 (12) 50 1,214 2,510 1,207 3,110 1,214 3,939 2,225 5,702 1,618 6,455 6,007 6,222
118 (10) 50 1,284 2,510 1,207 3,110 1,284 3,939 2,225 5,702 1,712 6,455 6,007 6,222
Maximum Allowable Clip Load 1,421 2,510 1,207 3,110 2,580 4,107 2,225 5,702 4,158 6,455 6,007 6,222
StiffClip® CL800, Recommended Allowable Load: F1, F2, F3 (lbs) & M1 (in-lbs)
Stud CL800-68 CL800-118 CL800-118 (H)
Thickness Mils (ga) Yield Strength (ksi) 6 Screws, Pattern 5 6 Screws, Pattern 5 10 Screws, Pattern 6
F1 F2 F3 M1 F1 F2 F3 M1 F1 F2 F3 M1
33 (20) 33 286 976 1,077 2,479 286 976 1,130 2,479 381 1,664 1,884 4,710
33 (20) 50 413 1,410 1,077 2,860 413 1,410 1,633 3,582 550 2,404 2,722 6,805
43 (18) 33 373 1,452 1,077 2,860 373 1,452 1,682 3,689 497 2,476 2,804 7,010
43 (18) 50 538 2,098 1,077 2,860 538 2,098 2,431 5,330 718 3,577 4,051 10,128
54 (16) 33 468 2,042 1,077 2,860 468 2,042 2,366 5,188 624 3,481 3,943 9,856
54 (16) 50 676 2,662 1,077 2,860 676 2,950 2,666 7,493 901 5,029 5,695 11,143
68 (14) 50 851 2,662 1,077 2,860 851 4,171 2,666 8,229 1,134 7,110 7,446 11,143
97 (12) 50 1,214 2,662 1,077 2,860 1,214 4,398 2,666 8,229 1,618 7,497 7,446 11,143
118 (10) 50 1,284 2,662 1,077 2,860 1,284 4,398 2,666 8,229 1,712 7,497 7,446 11,143
Maximum Allowable Clip Load 1,435 2,662 1,077 2,860 3,356 6,410 2,666 8,229 4,816 8,274 7,446 11,143
StiffClip® CL, Recommended Allowable Load (in-lbs/rad): Stiffness
Designation Screw Pattern Stiffness
CL362/400-68 4 Screws, Pattern 1 85,340
CL362/400-118 4 Screws, Pattern 1 109,279
CL362/400-118 (H) 9 Screws, Pattern 2 169,064
CL600-68 6 Screws, Pattern 3 119,025
CL600-118 6 Screws, Pattern 3 182,790
CL600-118 (H) 10 Screws, Pattern 4 568,854
CL800-68 6 Screws, Pattern 5 150,779
CL800-118 6 Screws, Pattern 5 469,941
CL800-118 (H) 10 Screws, Pattern 6 581,080
  • Allowable load tables incorporate eccentric loading of fasteners. Values with welded connection may increase.
  • Stiffness is the Max Allowable Clip Moment divided by the clip rotation measured at the Max Allowable Clip Moment.
  • When determining the allowable load of fasteners securing StiffClip to the base material and clip to stud, consider the following:
    • Fasten within ¾” from the angle heel (centerline of the 1½” leg), using pre-drilled holes if desired
    • Center hole is 0.563” in diameter for ½" anchor
    • Middle guide holes are .313” in diameter
    • Outer guide holes are 0.172” in diameter
    • Guide holes are in place for fastener installation efficiency. Number of fasteners determined by designer
    • Attachment to stud is made with #12 screws, symmetrically place
  • Loads listed reflect force in a single direction. When multiple loads react on the connection, it is the responsibility of the designer to check the interaction of forces.
  • All guide holes may not require fasteners. Fastener amount determined by the designer. Screw fasteners should be symmetrically placed in guide holes. Refer to screw pattern diagrams above for placement.
  • Allowable loads have not been increased for wind, seismic, or other factors, and are based on use of #12 screws.
  • Torsional effects are considered on screw group for F2 & F3 allowable loads. It is assumed that half of the torsional moment is taken by the connection to the structure and half is taken by the connection to the stud.
  • M1 Loads are reported as Max. Load/Factor of Safety. Loads must be limited by serviceability Load taken as Stiffness times the serviceability limit in radians.

Screw Pattern

StiffClip_CL_Screw_Patterns

Load Direction

StiffClip_CL_Load_Direction

The following equation for tension force in the anchor is derived using the assumed bearing stress distribution shown in the fi gure to the right. This assumed stress distribution provides a conservative anchor force approximation.

StiffClip_CL_Anchor_Bolt_Design_Formula

StiffClip_CL_Anchor_Bolt_Design

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.
StiffClip® CL and the rest of TSN's Rigid Connection Product Line can be found in the following Catalogs:

TSN_Connections_Tech_Catalog_Cover

TSN Connection
Technical Catalog

TSN_Reduced_Connections_Catalog_Cover

TSN Connection
Order Catalog

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