DESC - Exterior Head-of-Wall Drift Clip

The DESC multi-drift clip attaches the exterior stud to the top track (head-of-wall) which is fastened to building structure, allowing for vertical deflection and lateral drift. This clip prevents vertical load transfers into the curtain wall. The inserts are pre-installed to the clip making installation quick, easy, and efficient. Clips are packaged in durable buckets for easy handling on the jobsite.

Features & Benefits

  • Insert allows for 2” total vertical deflection and 2” lateral drift
         - Greater than 2” are available
  • Loads based on #10 screws
         - Screws are provided
  • Large insert piece for easy installation
  • Pre-punched guide holes
  • Transfers horizontal loads into structure
  • Provides positive attachment at each stud

Material Composition

  • Mill certified steel
  • ASTM A653/A653M 
  • Clip
         - Material thickness: 68 mil
         - Yield strength: 57 ksi
         - Tensile strength: 65 ksi
         - G90 galvanized coating
  • Insert 
         - Material thickness: 97 mil
         - Yield strength: 57 ksi
         - Tensile strength: 65 ksi
         - G90 galvanized coating
 

Allowable Loads

Model No. Stud Thickness F1 Allowable Loads (lbs)
Mils Gauge Fy (ksi) 2 #10 Screws*
DESC
337
33EQS 20 57 433
43EQS 18 57 683
33 20 33 353
43 18 33 526
54 16 50 830
68 14 50 830
97 12 50 830
118 10 50 830
Maximum Allowable Clip Load 830

 

Model No. Stud Thickness Allowable Loads (lbs)
Mils Gauge Fy (ksi) 2 #10 Screws* 3 #10 Screws*
DESC
550
750
950
1150
33EQS 20 57 433 649
43EQS 18 57 683 1025
33 20 33 353 530
43 18 33 526 789
54 16 50 1068 1602
68 14 50 1510 1890
97 12 50 1890 1890
118 10 50 1890 1890
Maximum Allowable Clip Load 1890 1890

Table Notes

  1. Allowable loads have not been increased for wind, seismic, or other factors.
  2. The allowable loads are based on the steel properties of the members being connected, per AISI S100.
  3. The nominal strength of the screw must be at least 3.75 times the allowable loads.
  4. Penetration of screws through joined materials should not be less than 3 exposed threads. Install and tighten screws in accordance with the screw manufacturer's recommendations.
  5. Screw shear capacities are based on allowable strength design (ASD) and include a safety factor of 3.0.
  6. Allowable loads indicated on the table(s) are for force in single direction only. If more than one force is applied to the connection, the designer shall provide the combined forces check as required by AISI S100.
  7. The designer shall check the bending in the short leg of clip.
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Quantity / Order Information

Model No. Width Qty / Bucket  lbs / Bucket
DESC337 3 ⅜" 50 42
DESC550 5 ½" 30 41
DESC750 7 ½" 30 56
DESC950 9 ½" 20 47
DESC1150 11 ½" 20 58

All DESC slide clips include inserts. Additional lengths available upon request.