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Drift Headed Rail (DHR97) and Drift Clips (DRC)

2-PIECE SYSTEM FOR DRIFT, DEFLECTION AND RIGID APPLICATIONS for cast-in-place

ClarkDietrich Drift Headed Rail (DHR-97) and Drift Clip 97 mils or 68mils (12ga or 14ga) is a uniquely designed two-piece system that is used to attach curtain-wall studs to the building structure and allows for vertical and lateral movement or to be rigidly attached.

Application(s): Bypass Connection

The system utilizes a C-Shaped Drift Headed Rail and distinctively designed Drift Rail Clips that rotate into position for easy installation.  The Drift Headed Rail is a C-Shaped Drift Rail with nelson studs welded at 8" o.c. for a cast-in-place applications. For mechanically fastened applications refer to the DR-97 Drift Rail. The Drift Rail Clips use FastClip Deflection Screws for attachment to the wall studs and allows for 3" vertical deflection (1-1/2" up and down) and is also designed with 1/8" holes to rigidly attach wall studs.

12ga Drift headed rail w/ nelson headed studs (DHR-97)

Product Specifications

Headed Anchor Material: Grades 1010 through 1020, 51ksi (351MPa) minimum yield strength, 65ksi (448MPa) minimum tensile strength
Physical properties of Headed Anchors are in accordance with AWS D1.1.
Coating: G90 (Z275) hot-dipped galvanized coating
See submittals for product weights

14ga Drift clips (DRC-68)

Product Specifications

Material: Structural Grade 50 Type H (ST50H), 50ksi
Coating: G90 (Z275) hot-dipped galvanized coating
See submittals for product weights

FastClip™ Deflection Screws

ClarkDietrich deflection clips include our proprietary FastClip fastener that has been specifically designed to provide friction-free deflection. These fasteners eliminate drag, binding or resistance that can often occur with common fasteners.
 

12ga Drift clips (DRC-97)

Product Specifications

Material: Structural Grade 50 Type H (ST50H), 50ksi
Coating: G90 (Z275) hot-dipped galvanized coating
See submittals for product weights

FastClip™ Deflection Screws

ClarkDietrich deflection clips include our proprietary FastClip fastener that has been specifically designed to provide friction-free deflection. These fasteners eliminate drag, binding or resistance that can often occur with common fasteners.

drift stops (optional)

To restrict clip lateral movement (Drift) along the Drift Rail, install one of two types of stops:

  • Drift Locking Angle (DRLA) is an L-shaped clip
  • Drift Locking Clip (DRLC) is a C-shaped clip

Allowable Drift Headed Rail and Clip loads based on cast-in-place to the structure:

Installation:

Design load capacities for cast-in-place installations are tabulated in the product Design Guide and include:

With the Drift Headed Rail embedded in the concrete structure, the Drift Clips can be positioned as required:

  • The framing stud web must contact the flat face of the long leg of the Drift Clip.
  • Note that one of the four slots in the channel portion of the Drift Clip is longer than the others.
  • Tilt the Drift Clip and position it so that the longer slot initially engages one leg of the Drift Rail.
  • Rotate the Drift Clip to the vertical position, engaging all four slots with the Drift Rail legs.

Connection between the Drift Clip and Framing Studs:

  • For bypass connections, Proprietary Deflection Screws are placed through each slotted hole of the long leg, of the Drift Clip to the web of the stud.
  • The required number and location of the slotted holes used to secure the stud is determined by the required design load capacity.
  • For rigid connections, self-drilling screws are placed through the pilot holes around the perimeter of the long leg of the Drift Clip to the web of the stud.

To restrict clip lateral movement (Drift) along the Drift Rail, install one of two types of stops:

Drift Locking Angle (DRLA) is an L-shaped clip

  • The long leg is inserted into the channel of the Drift Rail Clip, − The short leg is secured to the flange of the Drift Rail with a #10 self-drilling screw

Drift Locking Clip (DRLC) is a C-shaped clip

  • The DRLC sits within the channel of the Drift Clip, and straddles the flanges of the Drift Rail.
  • The two outside legs of the DRLC are secured to each flange of the Drift Rail with a #10 self-drilling screw.

Code Approvals & Performance Standards

  • AWS D1.1 Structural Welding - Steel
  • ASTM A29 Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
  • ASTM A108 Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished
  • ASTM A653 Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process
  • ASTM A1003 Standard Specification for Steel Sheet, Carbon, Metallic- and Nonmetallic-Coated for Cold-Formed Framing Members
  • SDS For ASTM A1003 Steel Framing Products For Interior Framing, Exterior Framing and Clips/Accessories

CAD Details

Drift Rail and Clip
Drift Rail and Clip
Drift Rail and Clip
Stud Connection Bypass Drift Rail+Clip (DRC3)
Stud Connection Bypass Drift Rail+Clip (DRC3)
Stud Connection Bypass Drift Rail+Clip (DRC3)
Stud Connection Bypass Drift Rail+Clip (DRC6)
Stud Connection Bypass Drift Rail+Clip (DRC6)
Stud Connection Bypass Drift Rail+Clip (DRC6)
Stud Connection Bypass Drift Rail+Clip (DRC8)
Stud Connection Bypass Drift Rail+Clip (DRC8)
Stud Connection Bypass Drift Rail+Clip (DRC8)

PRoduct submittal SHeets

Click the below Product Code to view Submittal/Tech Datasheet.

Product CodeDescription
DRC3-9797mils (12GA) Clip / 97mils (12GA) Rail
DRC6-97
DRC8-97
DRC3-6868mils (14GA) Clip / 97mils (12GA) Rail
DRC6-68
DRC8-68

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