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 90° angle to increase bending strength. StiffClip CL resists vertical, horizontal, and torsional loads.
Features
- 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
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 |
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.
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: ½” steel, ASTM A36, 36ksi min yield, 58-80ksi min tensile, with ASTM B633 Type II Yellow Zinc Coating, or Paint, or Equivalent.
Catalogs
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 can be found in the following Catalogs:
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For a full list of our product catalogs, specification sections, inspection checklists, and research reports please click here.
US Patents #7,533,508
StiffClip® CL Downloads
StiffClip® CL Applications
The attachment of StiffClip CL 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.
Anchor
Installation Instructions
- Place StiffClip® CL at bottom of stud.
- Attach clip to deck with approved anchor.
- Secure clip to stud with required amount of symmetrically placed #12 screw fasteners.
- If the (H) Piece is used, secure to clip with approved anchor to deck.
Allowable Loads
33mil (20ga), 33ksi Stud
33mil (20ga), 50ksi Stud
43mil (18ga), 33ksi Stud
43mil (18ga), 50ksi Stud
54mil (16ga), 33ksi Stud
54mil (16ga), 50ksi Stud
68mil (14ga), 33ksi Stud
68mil (14ga), 50ksi Stud
97mil (12ga), 33ksi Stud
97mil (12ga), 50ksi Stud
118mil (10ga), 50ksi Stud
Maximum Allowable Clip Load
CL362/400-68
Pattern 1: 4 ScrewsF1 Load Direction
190
276
248
358
312
450
392
568
560
810
988
1,416
CL362/400-68
Pattern 1: 4 ScrewsF2 Load Direction
535
774
796
1,152
1,121
1,618
1,584
1,917
1,917
1,917
1,917
1,917
CL362/400-68
Pattern 1: 4 ScrewsF3 Load Direction
752
1,088
1,120
1,151
1,151
1,151
1,151
1,151
1,151
1,151
1,151
1,151
CL362/400-68
Pattern 1: 4 ScrewsM1 Load Direction
1,096
1,586
1,633
1,804
1,804
1,804
1,804
1,804
1,804
1,804
1,804
1,804
CL362/400-68
Pattern 1: 4 ScrewsM1 Stiffness
108,055
108,055
108,055
108,055
108,055
108,055
108,055
108,055
108,055
108,055
108,055
33mil (20ga), 33ksi Stud
33mil (20ga), 50ksi Stud
43mil (18ga), 33ksi Stud
43mil (18ga), 50ksi Stud
54mil (16ga), 33ksi Stud
54mil (16ga), 50ksi Stud
68mil (14ga), 33ksi Stud
68mil (14ga), 50ksi Stud
97mil (12ga), 33ksi Stud
97mil (12ga), 50ksi Stud
118mil (10ga), 50ksi Stud
Maximum Allowable Clip Load
CL362/400-118
Pattern 1: 4 ScrewsF1 Load Direction
190
276
248
358
312
450
392
568
560
810
988
2,423
CL362/400-118
Pattern 1: 4 ScrewsF2 Load Direction
535
774
796
1,152
1,121
1,618
1,584
2,039
2,039
2,039
2,039
4,107
CL362/400-118
Pattern 1: 4 ScrewsF3 Load Direction
752
1,088
1,120
1,620
1,576
2,225
2,225
2,225
2,225
2,225
2,225
2,225
CL362/400-118
Pattern 1: 4 ScrewsM1 Load Direction
1,096
1,586
1,633
2,362
2,297
3,318
3,248
3,936
3,936
3,936
3,936
3,936
CL362/400-118
Pattern 1: 4 ScrewsM1 Stiffness
297,794
297,794
297,794
297,794
297,794
297,794
297,794
297,794
297,794
297,794
297,794
33mil (20ga), 33ksi Stud
33mil (20ga), 50ksi Stud
43mil (18ga), 33ksi Stud
43mil (18ga), 50ksi Stud
54mil (16ga), 33ksi Stud
54mil (16ga), 50ksi Stud
68mil (14ga), 33ksi Stud
68mil (14ga), 50ksi Stud
97mil (12ga), 33ksi Stud
97mil (12ga), 50ksi Stud
118mil (10ga), 50ksi Stud
Maximum Allowable Clip Load
CL362/400-118(H)
Pattern 2: 9 ScrewsF1 Load Direction
285
414
372
537
468
675
588
852
840
1,215
1,482
1,482
CL362/400-118(H)
Pattern 2: 9 ScrewsF2 Load Direction
1,023
1,480
1,523
2,203
2,143
3,095
3,030
3,900
3,900
3,900
3,900
4,978
CL362/400-118(H)
Pattern 2: 9 ScrewsF3 Load Direction
1,692
2,448
2,520
3,645
3,546
5,121
5,013
5,713
5,713
5,713
5,713
5,713
CL362/400-118(H)
Pattern 2: 9 ScrewsM1 Load Direction
1,644
2,379
2,449
3,542
3,446
4,147
4,147
4,147
4,147
4,147
4,147
4,147
CL362/400-118(H)
Pattern 2: 9 ScrewsM1 Stiffness
457,277
457,277
457,277
457,277
457,277
457,277
457,277
457,277
457,277
457,277
457,277
33mil (20ga), 33ksi Stud
33mil (20ga), 50ksi Stud
43mil (18ga), 33ksi Stud
43mil (18ga), 50ksi Stud
54mil (16ga), 33ksi Stud
54mil (16ga), 50ksi Stud
68mil (14ga), 33ksi Stud
68mil (14ga), 50ksi Stud
97mil (12ga), 33ksi Stud
97mil (12ga), 50ksi Stud
118mil (10ga), 50ksi Stud
Maximum Allowable Clip Load
CL600-68
Pattern 3: 6 ScrewsF1 Load Direction
285
414
372
537
468
675
588
852
840
1,215
1,421
1,421
CL600-68
Pattern 3: 6 ScrewsF2 Load Direction
872
1,262
1,299
1,879
1,828
2,510
2,510
2,510
2,510
2,510
2,510
2,510
CL600-68
Pattern 3: 6 ScrewsF3 Load Direction
1,067
1,067
1,067
1,067
1,067
1,067
1,067
1,067
1,067
1,067
1,067
1,067
CL600-68
Pattern 3: 6 ScrewsM1 Load Direction
1,788
2,435
2,435
2,435
2,435
2,435
2,435
2,435
2,435
2,435
2,435
2,435
CL600-68
Pattern 3: 6 ScrewsM1 Stiffness
160,215
160,215
160,215
160,215
160,215
160,215
160,215
160,215
160,215
160,215
160,215
33mil (20ga), 33ksi Stud
33mil (20ga), 50ksi Stud
43mil (18ga), 33ksi Stud
43mil (18ga), 50ksi Stud
54mil (16ga), 33ksi Stud
54mil (16ga), 50ksi Stud
68mil (14ga), 33ksi Stud
68mil (14ga), 50ksi Stud
97mil (12ga), 33ksi Stud
97mil (12ga), 50ksi Stud
118mil (10ga), 50ksi Stud
Maximum Allowable Clip Load
CL600-118
Pattern 3: 6 ScrewsF1 Load Direction
285
414
372
537
468
675
588
852
840
1,215
1,482
2,583
CL600-118
Pattern 3: 6 ScrewsF2 Load Direction
872
1,262
1,299
1,879
1,828
2,640
2,584
3,327
3,327
3,327
3,327
4,107
CL600-118
Pattern 3: 6 ScrewsF3 Load Direction
1,128
1,632
1,680
2,225
2,225
2,225
2,225
2,225
2,225
2,225
2,225
2,225
CL600-118
Pattern 3: 6 ScrewsM1 Load Direction
1,788
2,588
2,664
3,853
3,748
5,413
5,299
5,702
5,702
5,702
5,702
5,702
CL600-118
Pattern 3: 6 ScrewsM1 Stiffness
354,427
354,427
354,427
354,427
354,427
354,427
354,427
354,427
354,427
354,427
354,427
33mil (20ga), 33ksi Stud
33mil (20ga), 50ksi Stud
43mil (18ga), 33ksi Stud
43mil (18ga), 50ksi Stud
54mil (16ga), 33ksi Stud
54mil (16ga), 50ksi Stud
68mil (14ga), 33ksi Stud
68mil (14ga), 50ksi Stud
97mil (12ga), 33ksi Stud
97mil (12ga), 50ksi Stud
118mil (10ga), 50ksi Stud
Maximum Allowable Clip Load
CL600-118(H)
Pattern 4: 10 ScrewsF1 Load Direction
380
552
496
716
624
900
784
1,136
1,120
1,620
1,976
4,158
CL600-118(H)
Pattern 4: 10 ScrewsF2 Load Direction
1,478
2,138
2,201
3,184
3,097
4,473
4,379
5,636
5,636
5,636
5,636
6,455
CL600-118(H)
Pattern 4: 10 ScrewsF3 Load Direction
1,880
2,720
2,800
4,050
3,940
5,690
5,570
6,007
6,007
6,007
6,007
6,007
CL600-118(H)
Pattern 4: 10 ScrewsM1 Load Direction
3,157
4,568
4,702
6,801
6,617
7,306
7,306
7,306
7,306
7,306
7,306
7,306
CL600-118(H)
Pattern 4: 10 ScrewsM1 Stiffness
525,127
525,127
525,127
525,127
525,127
525,127
525,127
525,127
525,127
525,127
525,127
33mil (20ga), 33ksi Stud
33mil (20ga), 50ksi Stud
43mil (18ga), 33ksi Stud
43mil (18ga), 50ksi Stud
54mil (16ga), 33ksi Stud
54mil (16ga), 50ksi Stud
68mil (14ga), 33ksi Stud
68mil (14ga), 50ksi Stud
97mil (12ga), 33ksi Stud
97mil (12ga), 50ksi Stud
118mil (10ga), 50ksi Stud
Maximum Allowable Clip Load
CL800-68
Pattern 5: 6 ScrewsF1 Load Direction
285
414
372
537
468
675
588
852
840
1,215
1,435
1,435
CL800-68
Pattern 5: 6 ScrewsF2 Load Direction
973
1,408
1,449
2,096
2,039
2,662
2,662
2,662
2,662
2,662
2,662
2,662
CL800-68
Pattern 5: 6 ScrewsF3 Load Direction
1,077
1,077
1,077
1,077
1,077
1,077
1,077
1,077
1,077
1,077
1,077
1,077
CL800-68
Pattern 5: 6 ScrewsM1 Load Direction
2,483
2,860
2,860
2,860
2,860
2,860
2,860
2,860
2,860
2,860
2,860
2,860
CL800-68
Pattern 5: 6 ScrewsM1 Stiffness
190,670
190,670
190,670
190,670
190,670
190,670
190,670
190,670
190,670
190,670
190,670
33mil (20ga), 33ksi Stud
33mil (20ga), 50ksi Stud
43mil (18ga), 33ksi Stud
43mil (18ga), 50ksi Stud
54mil (16ga), 33ksi Stud
54mil (16ga), 50ksi Stud
68mil (14ga), 33ksi Stud
68mil (14ga), 50ksi Stud
97mil (12ga), 33ksi Stud
97mil (12ga), 50ksi Stud
118mil (10ga), 50ksi Stud
Maximum Allowable Clip Load
CL800-118
Pattern 5: 6 ScrewsF1 Load Direction
285
414
372
537
468
675
588
852
840
1,215
1,482
3,356
CL800-118
Pattern 5: 6 ScrewsF2 Load Direction
973
1,408
1,449
2,096
2,039
2,945
2,883
3,711
3,711
3,711
3,711
6,410
CL800-118
Pattern 5: 6 ScrewsF3 Load Direction
1,128
1,632
1,680
2,430
2,364
2,666
2,666
2,666
2,666
2,666
2,666
2,666
CL800-118
Pattern 5: 6 ScrewsM1 Load Direction
2,483
3,592
3,697
5,348
5,203
7,514
7,355
8,229
8,229
8,229
8,229
8,229
CL800-118
Pattern 5: 6 ScrewsM1 Stiffness
548,677
548,677
548,677
548,677
548,677
548,677
548,677
548,677
548,677
548,677
548,677
33mil (20ga), 33ksi Stud
33mil (20ga), 50ksi Stud
43mil (18ga), 33ksi Stud
43mil (18ga), 50ksi Stud
54mil (16ga), 33ksi Stud
54mil (16ga), 50ksi Stud
68mil (14ga), 33ksi Stud
68mil (14ga), 50ksi Stud
97mil (12ga), 33ksi Stud
97mil (12ga), 50ksi Stud
118mil (10ga), 50ksi Stud
Maximum Allowable Clip Load
CL800-118(H)
Pattern 6: 10 ScrewsF1 Load Direction
380
552
496
716
624
900
784
1,136
1,120
1,620
1,976
4,816
CL800-118(H)
Pattern 6: 10 ScrewsF2 Load Direction
1,661
2,402
2,473
3,577
3,480
5,026
4,920
6,333
6,333
6,333
6,333
8,274
CL800-118(H)
Pattern 6: 10 ScrewsF3 Load Direction
1,880
2,720
2,800
4,050
3,940
5,690
5,570
7,170
7,170
7,170
7,170
7,446
CL800-118(H)
Pattern 6: 10 ScrewsM1 Load Direction
4,748
6,869
7,071
10,227
9,950
11,143
11,143
11,143
11,143
11,143
11,143
11,143
CL800-118(H)
Pattern 6: 10 ScrewsM1 Stiffness
696,515
696,515
696,515
696,515
696,515
696,515
696,515
696,515
696,515
696,515
696,515
Load Table Notes:
- Design loads are for attachment of StiffClip CL to stud only. Load tables reflect in plane of wall loads (F1), horizontal loads (F2), vertical loads (F3), and overturning loads (M1).
- M1 loads are reported as Max. Load divided by a Factor of Safety. M1 loads may be limited by the Serviceability Load calculated as Clip Stiffness times the Serviceability Limit in radian.
- Stiffness is the Allowable Clip Moment divided by the clip rotation measured at half of the Max Allowable Clip Moment.
- Design loads consider loads on the clip and #12 screw fasteners to the stud web.
- 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.
- Torsional effects are considered on screw group for F2 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.
- Attachment to structure engineered by others.
- Allowable loads have not been increased for wind, seismic, or other factors.
- Allowable load tables incorporate eccentric loading of fasteners. Values with a welded connection may increase.
- Guide holes are in place for fastener installation efficiency. All guide holes may not require fasteners. Fastener amount determined by the designer. Screw fastener should be symmmetrically placed in guide holes. Refer to screw pattern diagrams below for placement.
- Fasten within 3/4″ from the angle heel (centerline of the 1-1/2″ leg) to minimize eccentric load transfer.
- Center guide hole is 9/16″ in diameter for 1/2″ anchors. Middle guide holes are 5/16″ in diameter for 3/8″ anchors. Outer guide holes and guide holes in 3″ leg are 0.141″ in diameter.
- For LRFD strengths contact TSN technical services.
Load Direction
Anchor Bolt Design
Anchor Bolt Design Equation
Screw Patterns
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