DriftTrak® For Bypass
This drift slide track incorporates the DriftTrak member with the DriftTrak DTSLB slide angle or DriftTrak DTLB rigid angle and is used to connect exterior cold-formed steel curtain wall studs to the primary structure while bypassing the slab. Use the DTSLB clip angle for up to 2” vertical deflection (1” up and down) or DTLB clip angle for a rigid connection with no vertical deflection. The DriftTrak provides free lateral drift or the DTSLB/DTLB can be locked into with a locking angle place to prevent lateral movement.
Features
- DTSLB is ICC-ES Approved, report #ESR-2049
- Grooves in 1” leg pass over fastener heads
- DTSLB-HD clips without notches for greater F2 outward load capacity.
- Locking Angle DT-LA is available to lock the horizontal movement of the wall panel after installation for cases of no drift requirements.
- DriftTrak is available in 12’ lengths.
- Load-rated positive mechanical attachment at each stud
- Patented Step Bushing Technology® provides friction-free motion for smooth vertical deflection
- Eliminates loose friction-held assemblies, heavy deep-leg track, & top row of wall bridging/strapping
- Load-rated #12 screws provided for vertical deflection connection to stud web
- Track DTLB, & DTSLB-HD manufactured with certified, 50ksi, 97mil, G90 cold-formed steel
- DTSLB manufactured with certified, 50ksi, 68mil, G90 cold-formed steel
Order Information
Qty/Box
DTSLB362/400
50
DTSLB362/400-HD
50
DTSLB600
50
DTSLB600-HD
50
DTSLB800
50
DTSLB800-HD
50
DTLB362/400
50
DTLB362/400-HD
50
DTLB600
50
DTLB600-HD
50
DTLB800
50
DTLB800-HD
50
DT-LA (Locking Angle)
100
DT-12ft
1
Lbs/Box
DTSLB362/400
23
DTSLB362/400-HD
31
DTSLB600
30
DTSLB600-HD
42
DTSLB800
37
DTSLB800-HD
51
DTLB362/400
31
DTLB362/400-HD
33
DTLB600
42
DTLB600-HD
44
DTLB800
52
DTLB800-HD
53
DT-LA (Locking Angle)
3.6
DT-12ft
25 (per Piece)
Qty/Skid
DTSLB362/400
2,250
DTSLB362/400-HD
2,250
DTSLB600
2,250
DTSLB600-HD
2,250
DTSLB800
2,250
DTSLB800-HD
2,250
DTLB362/400
2,250
DTLB362/400-HD
2,250
DTLB600
2,250
DTLB600-HD
2,250
DTLB800
2,250
DTLB800-HD
2,250
DT-LA (Locking Angle)
9,000
DT-12ft
100
Lbs/Skid
DTSLB362/400
1,052
DTSLB362/400-HD
1,437
DTSLB600
1,388
DTSLB600-HD
1,909
DTSLB800
1,689
DTSLB800-HD
2,339
DTLB362/400
1,435
DTLB362/400-HD
1,504
DTLB600
1,941
DTLB600-HD
2,011
DTLB800
2,371
DTLB800-HD
2,440
DT-LA (Locking Angle)
324
DT-12ft
2,500
Nomenclature: The DriftTrack assembly requires the member (DT-12ft) and the connector
(DTSLB/DTLB). DTSLB is classified by multiplying stud depth by 100, followed by “HD,” based on F2 strength required.
Refer to load tables.*
Example:6″ stud depth, with an outward load (F2) of 1,000 lbs
Designate: DT-12ft & DTSLB600-HD
* Clips (DTSLB/DTLB) and track (DT-12ft) are ordered/sold separately.
** Notches are standard in DriftTrak DTSLB. For greater F2 outward load capacity, use DTSLB-HD clips without
notches. Refer to Allowable Load Table.
Material Composition
Track, DTLB, & DTSLB-HD Material: ASTM A1003/A1003M Structural Grade 50 (340) Type H, ST50H (ST340H): 50ksi (340MPa) minimum yield strength, 65ksi (450MPa) minimum tensile strength, 97mil minimum thickness (12 gauge, 0.1017″ design thickness) with ASTM A653/A653M G60 (Z180) hot dipped galvanized coating.
DTSLB Clip Material: 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.
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. DriftTrak® Bypass 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 #7,503,150
DriftTrak® Bypass Downloads
DriftTrak® Bypass Applications
The unique design of DriftTrak allows it to be installed to provide any combination of movement allowing or rigid connections in the vertical and horizontal directions. Attachment 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.
Curtain Wall Slab Bypass as a Drift & Vertical Deflection Connection
Curtain Wall Slab Bypass as a Drift Connection with No Vertical Deflection
Installation Instructions
- Fastener Pattern 1 replicates a condition of out-of-plane wind or seismic force with no vertical live load deflection and full in-plane drift.
- Fastener Pattern 2 replicates a condition of out-of-plane wind or seismic force with full vertical live load deflection and full in-plane drift.
Notes:
- Allow a minimum of 0.875″ from the structure to the inside flange of the bypassing stud to allow for track attachment.
- One row of bridging is recommended at a maximum distance of 12″ from DriftTrak to resist torsional effects.
- To lock lateral movement, fasten DT-LA (Locking Angle) to DriftTrak components using #12 screws (not included). Locking is recommended at 4 ft. spacing or 3rd stud, max.
DriftTrak® Bypass 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), 50ksi Stud
97mil (12ga), 50ksi Stud
Maximum Allowable Clip Load
F2 Allowable Loads for Fastener Pattern 1 & 2
DTSLB (With Notches)
8” Fastener Spacing in Track to Structure (or welded on each side)
2 Screws
376
544
560
808
788
808
808
808
808
F2 Allowable Loads for Fastener Pattern 1 & 2
DTSLB (With Notches)
8” Fastener Spacing in Track to Structure (or welded on each side)
3 Screws
564
808
808
808
808
808
808
808
808
F2 Allowable Loads for Fastener Pattern 1 & 2
DTSLB (With Notches)
16” Fastener Spacing in Track to Structure (or welded on each side)
2 Screws
376
544
560
753
753
753
753
753
753
F2 Allowable Loads for Fastener Pattern 1 & 2
DTSLB (With Notches)
16” Fastener Spacing in Track to Structure (or welded on each side)
3 Screws
564
753
753
753
753
753
753
753
753
F2 Allowable Loads for Fastener Pattern 1 & 2
DTSLB-HD (Without Notches)
8” Fastener Spacing in Track to Structure (or welded on each side)
2 Screws
376
544
560
810
788
1,138
1,554
1,554
1,618
F2 Allowable Loads for Fastener Pattern 1 & 2
DTSLB-HD (Without Notches)
8” Fastener Spacing in Track to Structure (or welded on each side)
3 Screws
564
816
840
1,215
1,182
1,618
1,618
1,618
1,618
F2 Allowable Loads for Fastener Pattern 1 & 2
DTSLB-HD (Without Notches)
16” Fastener Spacing in Track to Structure (or welded on each side)
2 Screws
376
544
560
753
753
753
753
753
953
F2 Allowable Loads for Fastener Pattern 1 & 2
DTSLB-HD (Without Notches)
16” Fastener Spacing in Track to Structure (or welded on each side)
3 Screws
564
816
840
953
953
953
953
953
953
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), 50ksi Stud
97mil (12ga), 50ksi Stud
Maximum Allowable Clip Load
F2 Load Direction
8" Fastener Spacing in Track to
Structure (or Welded on Both Sides)
Structure (or Welded on Both Sides)
Fastener Pattern 1
2 Screws
376
544
560
625
625
625
625
625
625
F2 Load Direction
8" Fastener Spacing in Track to
Structure (or Welded on Both Sides)
Structure (or Welded on Both Sides)
Fastener Pattern 2
2 Screws
376
482
482
482
482
482
482
482
482
F2 Load Direction
16" Fastener Spacing in Track to
Structure (or Welded on Both Sides)
Structure (or Welded on Both Sides)
Fastener Pattern 1
2 Screws
376
544
560
625
625
625
625
625
625
F2 Load Direction
16" Fastener Spacing in Track to
Structure (or Welded on Both Sides)
Structure (or Welded on Both Sides)
Fastener Pattern 2
2 Screws
449
449
449
449
449
449
449
449
449
Notes:
- Design loads are for attachment of DriftTrak DT w/ DTSLB-HD to stud only.
- Allowable loads have not been increased for wind, seismic, or other factors.
- Clips are manufactured to fit into DriftTrak DT. DriftTrak DT w/ DTSLB-HD allows up to 2″ of vertical deflection (1″ up and 1″ down), and free lateral movement of the structure.
- #12 screws are provided for each step bushing attachment to studs. Load requirements don’t always justify use of a third screw.
- Attachment to structure at 8″ or 16″ spacing to be engineered by others.
- One row of bridging is recommended at a maximum distance of 18″ from DriftTrak DT w/ DTSLB-HD to resist torsional effects.
- Allow a minimum of 7/8″ from the structure to the inside flange of the bypassing stud to allow for track attachment.
- Total offset of stud from the edge of slab should not exceed 2″ for DriftTrak DT w/ DTSLB362/400-HD or DTSLB600-HD clips.
- Total offset of stud from the edge of slab should not exceed 3-1/4″ for DriftTrak DT w/ DTSLB800-HD clips.
- Total offset is measured from the edge of slab to the inside face of the stud.
- For LRFD strengths contact TSN technical services.
Load Direction
Screw Pattern 1:
Replicates a condition of out-of-plane wind or seismic force with no vertical live load deflection and full in-plane drift.
Screw Pattern 2:
Replicates a condition of out-of-plane wind or seismic force with full vertical live load deflection and full in-plane drift.
Allowable Loads (lbs): DriftTrak® DTLB & DTLB-HD: F2 & 3
Screw Patterns With #12 Screws
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), 50ksi Stud
97mil (12ga), 50ksi Stud
Maximum Allowable Clip Load
F2 Allowable Loads
DriftTrak DT w/ DTLB362/400
Max. Offset = 1" for DTLB362/400
Max. Offset = 1" for DTLB362/400
4 Screws
752
1,009
1,009
1,009
1,009
1,009
1,009
1,009
1,009
F2 Allowable Loads
DriftTrak DT w/ DTLB362/400
Max. Offset = 1" for DTLB362/400
Max. Offset = 1" for DTLB362/400
6 Screws
1,009
1,009
1,009
1,009
1,009
1,009
1,009
1,009
1,009
F2 Allowable Loads
DriftTrak DT w/ DTLB600 or DTLB800
Max. Offset = 1"" for DTLB600
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
Max. Offset = 1"" for DTLB600
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
4 Screws
752
1,088
1,120
1,197
1,197
1,197
1,197
1,197
1,197
F2 Allowable Loads
DriftTrak DT w/ DTLB600 or DTLB800
Max. Offset = 1"" for DTLB600
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
Max. Offset = 1"" for DTLB600
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
6 Screws
1,128
1,197
1,197
1,197
1,197
1,197
1,197
1,197
1,197
F2 Allowable Loads
DriftTrak DT w/ DTLB600 or DTLB800
Max. Offset = 1"" for DTLB600
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
Max. Offset = 1"" for DTLB600
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
9 Screws
752
1,197
1,197
1,197
1,197
1,197
1,197
1,197
1,197
Screw Patterns With #12 Screws
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), 50ksi Stud
97mil (12ga), 50ksi Stud
Maximum Allowable Clip Load
F3 Allowable Loads
DriftTrak DT w/ DTLB362/400
Max. Offset = 1" for DTLB362/400
Max. Offset = 1" for DTLB362/400
4 Screws
228
330
340
492
478
691
870
870
1,163
F3 Allowable Loads
DriftTrak DT w/ DTLB362/400
Max. Offset = 1" for DTLB362/400
Max. Offset = 1" for DTLB362/400
6 Screws
228
330
340
492
478
691
870
870
1,163
F3 Allowable Loads
DriftTrak DT w/ DTLB600
Max. Offset = 1" for DTLB600
Max. Offset = 1" for DTLB600
4 Screws
258
373
384
555
540
780
982
982
1,750
F3 Allowable Loads
DriftTrak DT w/ DTLB600
Max. Offset = 1" for DTLB600
Max. Offset = 1" for DTLB600
6 Screws
309
447
460
666
648
936
1,179
1,179
1,750
F3 Allowable Loads
DriftTrak DT w/ DTLB600
Max. Offset = 1" for DTLB600
Max. Offset = 1" for DTLB600
9 Screws
433
627
645
933
908
1,312
1,653
1,653
1,750
F3 Allowable Loads
DriftTrak DT w/ DTLB800
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
4 Screws
226
327
337
487
474
685
863
863
1,272
F3 Allowable Loads
DriftTrak DT w/ DTLB800
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
6 Screws
264
382
393
568
553
799
1,006
1,006
1,272
F3 Allowable Loads
DriftTrak DT w/ DTLB800
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
Max. Offset = 1" for DTLB800 w/ 8" Studs
Max. Offset = 3" for DTLB800 w/ 6" Studs
9 Screws
375
543
559
809
787
1,136
1,272
1,272
1,272
Notes:
- Design loads are for attachment of DriftTrak DT w/ DTLB to stud only.
- Allowable loads have not been increased for wind, seismic, or other factors.
- Clips are manufactured to fit into DriftTrak DT. DriftTrak DT w/ DTLB provides a rigid connection to the stud while allowing free lateral movement of the structure.
- Torsional effects are considered on screw group for F3 allowable loads. It is assumed that all of the torsional moment is taken by the connection to the stud.
- Loads listed reflect force in a single direction. When multiple loads act on the connection, it is the responsibility of the designer to check the interaction of forces.
- Attachment to structure at 8″ spacing to be engineered by others.
- One row of bridging is recommended at a maximum distance of 18″ from DriftTrak DT w/ DTLB if no other stud lateral restraint is present.
- Notches are standard in DTLB clips. For greater F2 load capacities, use DTLB-HD clips without notches. Refer to allowable load tables.
- Allow a minimum of 7/8″ from the structure to the inside flange of the bypassing stud to allow for track attachment.
- Maximum total offset of stud from the edge of slab should not exceed 1″ for DriftTrak DT w/ DTLB362/400 or DTLB600 clips.
- Maximum total offset of stud from the edge of slab should not exceed 1″ for DriftTrak DT w/ DTLB800 clips with 8″ studs and 3″ for DriftTrak DT w/ DTLB800 clips with 6″ studs.
- Maximum total offset is measured as track flange plus the gap from the open face of the track to the inside face of the stud.
- For LRFD strengths contact TSN technical services.
DriftTrak DTLB - Load Direction
4-Hole Screw Pattern
6-Hole Screw Pattern
Allowable Loads (lbs): DriftTrak® DTLB-HD: F2 & 3
Screw Patterns With #12 Screws
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), 50ksi Stud
97mil (12ga), 50ksi Stud
Maximum Allowable Clip Load
F2 Allowable Loads
DriftTrak DT w/ DTLB362/400-HD
Max. Offset = 1" for DTLB362/400-HD
Max. Offset = 1" for DTLB362/400-HD
4 Screws
752
1,088
1,120
1,316
1,316
1,316
1,316
1,316
1,316
F2 Allowable Loads
DriftTrak DT w/ DTLB362/400-HD
Max. Offset = 1" for DTLB362/400-HD
Max. Offset = 1" for DTLB362/400-HD
6 Screws
1,128
1,316
1,316
1,316
1,316
1,316
1,316
1,316
1,316
F2 Allowable Loads
DriftTrak DT w/ DTLB600-HD or DTLB800-HD
Max. Offset = 1" for DTLB600-HD
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
Max. Offset = 1" for DTLB600-HD
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
4 Screws
752
1,088
1,120
1,620
1,576
1,749
1,749
1,749
1,749
F2 Allowable Loads
DriftTrak DT w/ DTLB600-HD or DTLB800-HD
Max. Offset = 1" for DTLB600-HD
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
Max. Offset = 1" for DTLB600-HD
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
6 Screws
1,128
1,632
1,680
1,749
1,749
1,749
1,749
1,749
1,749
F2 Allowable Loads
DriftTrak DT w/ DTLB600-HD or DTLB800-HD
Max. Offset = 1" for DTLB600-HD
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
Max. Offset = 1" for DTLB600-HD
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
9 Screws
752
1,692
1,749
1,749
1,749
1,749
1,749
1,749
1,749
Screw Patterns With #12 Screws
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), 50ksi Stud
97mil (12ga), 50ksi Stud
Maximum Allowable Clip Load
F3 Allowable Loads
DriftTrak DT w/ DTLB362/400-HD
Max. Offset = 1 for DTLB362/400-HD
Max. Offset = 1 for DTLB362/400-HD
4 Screws
228
330
340
492
478
691
870
870
1,163
F3 Allowable Loads
DriftTrak DT w/ DTLB362/400-HD
Max. Offset = 1 for DTLB362/400-HD
Max. Offset = 1 for DTLB362/400-HD
6 Screws
309
448
461
667
649
937
1,163
1,163
1,163
F3 Allowable Loads
DriftTrak DT w/ DTLB600-HD
Max. Offset = 1" for DTLB600-HD
Max. Offset = 1" for DTLB600-HD
4 Screws
258
373
384
555
540
780
982
982
1,750
F3 Allowable Loads
DriftTrak DT w/ DTLB600-HD
Max. Offset = 1" for DTLB600-HD
Max. Offset = 1" for DTLB600-HD
6 Screws
309
447
460
666
648
936
1,179
1,179
1,750
F3 Allowable Loads
DriftTrak DT w/ DTLB600-HD
Max. Offset = 1" for DTLB600-HD
Max. Offset = 1" for DTLB600-HD
9 Screws
433
627
645
933
908
1,312
1,653
1,653
1,750
F3 Allowable Loads
DriftTrak DT w/ DTLB800-HD
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
4 Screws
226
327
337
487
474
685
863
863
1,272
F3 Allowable Loads
DriftTrak DT w/ DTLB800-HD
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
6 Screws
264
382
393
568
553
799
1,006
1,006
1,272
F3 Allowable Loads
DriftTrak DT w/ DTLB800-HD
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
Max. Offset = 1" for DTLB800-HD w/ 8" Studs
Max. Offset = 3" for DTLB800-HD w/ 6" Studs
9 Screws
375
543
559
809
787
1,136
1,272
1,272
1,272
Notes:
- Design loads are for attachment of DriftTrak DT w/ DTLB-HD to stud only.
- Allowable loads have not been increased for wind, seismic, or other factors.
- Clips are manufactured to fit into DriftTrak DT. DriftTrak DT w/ DTLB-HD provides a rigid connection to the stud while allowing free lateral movement of the structure.
- Torsional effects are considered on screw group for F3 allowable loads. It is assumed that all of the torsional moment is taken by the connection to the stud.
- Loads listed reflect force in a single direction. When multiple loads act on the connection, it is the responsibility of the designer to check the interaction of forces.
- Attachment to structure at 8″ spacing to be engineered by others.
- One row of bridging is recommended at a maximum distance of 18″ from DriftTrak DT w/ DTLB-HD if no other stud lateral restraint is present.
- Allow a minimum of 7/8″ from the structure to the inside flange of the bypassing stud to allow for track attachment.
- Maximum total offset of stud from the edge of slab should not exceed 1″ for DriftTrak DT w/ DTLB362/400-HD or DTLB600-HD clips.
- Maximum total offset of stud from the edge of slab should not exceed 1″ for DriftTrak DT w/ DTLB800-HD clips with 8″ studs and 3″ for DriftTrak DT w/ DTLB800-HD clips with 6″ studs.
- Maximum total offset is measured as track flange plus the gap from the open face of the track to the inside face of the stud.
- For LRFD strengths contact TSN technical services.
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