StiffClip® TD
The StiffClip® TD series’ unique design allows for the anchoring of wood or steel studs to the foundation incorporating a ¾” steel stiffening plate for strength. StiffClip TD resists vertical uplift loads for an effective solution in wall stud tie-downs or as the anchorage component in conventional, strap/gusset-plate shear wall construction.
Features
- Guide holes for connections to stud and deck
- Stiffening plate for additional strength
- Clip utilizes certified, 55ksi steel
- Reduces material (replaces heavy steel angles)
- Extensively tested
Order Information
| Designation | Qty/Box | Lbs/Box | Qty/Skid | Lbs/Skid |
| TD w/ Plate | 25 | 73 | 1,125 | 3,276 |
| TD w/o Plate | 40 | 50 | 1,800 | 2,254 |
| TD-LT | 50 | 48 | 1,800 | 2,152 |
Nomenclature
StiffClip TD-LT is available in one size without the use of the ‘TD Plate’. Contact TSN about installation with alternate anchor sizes.
StiffClip TD is available in one size and can be used with or without a 3/4″ plate on top of the 2-3/8″ leg. Anchor hole accommodates 7/8″ diameter anchor.
Example: 6″ stud, 5/8″ dia. anchor to concrete, holddown without plate
Designate: StiffClip(R) TD-LT
Example: 8″ stud, 7/8″ dia. anchor to concrete, holddown with plate
Designate: StiffClip(R) TD w/ Plate
Material Composition
Clip Steel: ASTM A1003/A1003M Structural Grade 55 (380) Type H, ST55H (ST380H): 55ksi (380MPa) minimum yield strength, 70ksi (480MPa) minimum tensile strength, 118mil minimum thickness (10 gauge, 0.1242″ design thickness) with ASTM A653/A653M G90 (Z275) hot dipped galvanized coating.
TD Plate: ASTM A36/A36M: 36ksi (250MPa) minimum yield strength, 58-80ksi (400-550MPa) minimum tensile strength, ASTM B633 Type II Yellow Zinc Coating, Paint, Powder Coating, or E-Coating, or approved 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® TD 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.
Patent Pending
StiffClip® TD Downloads
StiffClip® TD Applications
Wood Stud Tie Down
Steel Stud Tie Down
Shear Wall Column Anchor (Wood Framing)
X-Brace Shear Wall Column Anchor (Steel Framing)
Joist/Truss Top Chord Anchor
Medical Equipment Anchor
Tension Tie Anchor
Installation Instructions
- Place StiffClip® TD at bottom of stud and attach clip to deck with approved anchor.
- For StiffClip® TD w/ Plate, insert the plate over anchor as specified.
- Attach StiffClip® TD to the structure with specified anchors. Refer to Design Drawings for anchor size.
- Attach StiffClip® TD to stud per design specifications. Refer to Design Drawings for fastener type, size, and quantity.
Allowable Loads
Load Table Notes
- Design loads are for attachment of StiffClip TD to stud only. Load tables reflect vertical loads (F3).
- Design loads consider loads on the clip and #12 screw fasteners to the stud web for steel framing.
- Design loads consider loads on the clip and listed fasteners to the stud web for wood framing.
- Attachment to structure engineered by others.
- Allowable loads have not been increased for wind, seismic, or other factors.
- Allowable shear for nails and screws is increased 60% for wind and seismic loads in wood framing.
- Fasten within 1-1/4″ from the angle heel using the existing anchor hole.
- Guide holes are in place for fastern installation efficiency. The number of fastener are determine by the designer.
- Attachment to stud is made with up to 27 #12 screws, symmetrically place.
- For wood, moisture content > 19%, consult The Steel Network, Inc. for reduction in values.
- For LRFD strengths contact TSN technical services.
| StiffClip® TD, Recommended Allowable Loads for Steel Framing (lbs): F3 Load Direction | |||||||||
| TD-LT | TD w/o Plate | TD w/ Plate | |||||||
| Screw Patterns with #12 Screws | 4 Screws | 6 Screws | 8 Screws | 6 Screws | 8 Screws | 12 Screws | 12 Screws | 18 Screws | 27 Screws |
| 33mil (20ga), 33ksi Stud | 752 | 1,128 | 1,504 | 1,128 | 1,504 | 2,256 | 2,256 | 3,384 | 5,076 |
| 33mil (20ga), 50ksi Stud | 1,088 | 1,632 | 2,176 | 1,632 | 2,176 | 3,264 | 3,264 | 4,896 | 7,344 |
| 43mil (18ga), 33ksi Stud | 1,120 | 1,680 | 2,240 | 1,680 | 2,240 | 3,360 | 3,360 | 5,040 | 7,560 |
| 43mil (18ga), 50ksi Stud | 1,620 | 2,430 | 3,240 | 2,430 | 3,240 | 4,412 | 4,860 | 7,290 | 9,826 |
| 54mil (16ga), 33ksi Stud | 1,576 | 2,364 | 3,152 | 2,364 | 3,152 | 4,412 | 4,728 | 7,092 | 9,826 |
| 54mil (16ga), 50ksi Stud | 2,276 | 3,414 | 3,976 | 3,414 | 4,412 | 4,412 | 6,828 | 9,826 | 9,826 |
| 68mil (14ga), 50ksi Stud | 2,868 | 3,976 | 3,976 | 4,302 | 4,412 | 4,412 | 8,604 | 9,826 | 9,826 |
| 97mil (12ga), 50ksi Stud | 2,868 | 3,976 | 3,976 | 4,302 | 4,412 | 4,412 | 8,604 | 9,826 | 9,826 |
| Maximum Allowable Clip Load | 3,976 | 4,412 | 9,826 | ||||||
| StiffClip® TD-LT, Recommended Allowable Load for Wood Framing (lbs): F3 | ||||||
| Screw / Nail Patterns | Douglas Fir / Southern Pine | Spruce Pine-Fir / Hem-Fir | ||||
| 8 Fasteners | 12 Fasteners | 18 Fasteners | 8 Fasteners | 12 Fasteners | 18 Fasteners | |
| 10d Nails | 1,830 | 2,746 | 3,976 | 1,472 | 2,208 | 3,312 |
| 16d Nails | 2,125 | 3,187 | 3,976 | 1,715 | 2,573 | 3,859 |
| #12 Wood Screws | 2,227 | 3,976 | 3,976 | 1,792 | 2,688 | 3,976 |
| Maximum Allowable Clip Load | 3,976 | 3,976 | ||||
| StiffClip® TD w/o Plate, Recommended Allowable Load for Wood Framing (lbs): F3 | ||||||
| Screw / Nail Patterns | Douglas Fir / Southern Pine | Spruce Pine-Fir / Hem-Fir | ||||
| 8 Fasteners | 12 Fasteners | 18 Fasteners | 8 Fasteners | 12 Fasteners | 18 Fasteners | |
| 10d Nails | 1,830 | 2,746 | 4,118 | 1,472 | 2,208 | 3,312 |
| 16d Nails | 2,125 | 3,187 | 4,412 | 1,715 | 2,573 | 3,859 |
| #12 Wood Screws | 2,227 | 3,341 | 4,412 | 1,792 | 2,688 | 4,032 |
| Maximum Allowable Clip Load | 4,412 | 4,412 | ||||
| StiffClip® TD w/ Plate, Recommended Allowable Load for Wood Framing (lbs): F3 | ||||||
| Screw / Nail Patterns | Douglas Fir / Southern Pine | Spruce Pine-Fir / Hem-Fir | ||||
| 12 Fasteners | 18 Fasteners | 27 Fasteners | 12 Fasteners | 18 Fasteners | 27 Fasteners | |
| 10d Nails | 2,746 | 4,118 | 6,178 | 2,208 | 3,312 | 4,968 |
| 16d Nails | 3,187 | 4,781 | 7,171 | 2,573 | 3,859 | 5,789 |
| #12 Wood Screws | 3.341 | 5,011 | 7,517 | 2,688 | 4,032 | 6,048 |
| Maximum Allowable Clip Load | 9,826 | 9,826 | ||||
Uplift Diagram
Load Direction
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