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
DTLB600
50
DTLB600-HD
50
DTLB800
50
DTLB800-HD
50
DT-LA (Locking Angle)
100
DT-12ft
1
Lbs/Box
DTSLB362/400
25
DTSLB362/400-HD
25
DTSLB600
32
DTSLB600-HD
32
DTSLB800
42
DTSLB800-HD
42
DTLB600
40
DTLB600-HD
40
DTLB800
49
DTLB800-HD
49
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
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
1,125
DTSLB362/400-HD
1,125
DTSLB600
1,440
DTSLB600-HD
1,440
DTSLB800
1,890
DTSLB800-HD
1,890
DTLB600
1,771
DTLB600-HD
1,771
DTLB800
2,203
DTLB800-HD
2,203
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:

TSN Cold-Formed Steel Framing Connections Order Catalog

TSN Connections Technical Catalog

TSN Cold-Formed Steel Framing Connections Technical Catalog

TSN Connections Order Catalog

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.

DriftTrak Bypass DTSLB Application

Curtain Wall Slab Bypass as a Drift & Vertical Deflection Connection

MasterClip VLB Hybrid LSF Connector for Rigid Applications

Curtain Wall Slab Bypass as a Drift Connection with No Vertical Deflection

Installation Instructions

  1. 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.
  2. 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

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 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
810
788
953
953
953
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

Notes:

  • Design loads are for attachment of DriftTrak DTSLB to stud only. Load tables reflect horizontal loads (F2).
  • Attachment to structure engineered by others.
  • Allowable loads have not been increased for wind, seismic, or other factors.
  • #12 screws are provided with each step bushing for attachment to stud. Load requirements don’t always justify use of a third screw.
  • Clips are manufactured to fit into the DriftTrak and provide up to 2″ of vertical deflection (1″ up and 1″ down), and free lateral movement of the structure.
  • Allow a minimum of 0.875″ from the structure to the inside flange of the bypassing stud to allow for track attachment. Standard offset of stud from the open face of the track should not exceed 1.25″.
  • One row of bridging is recommended at a maximum distance of 18” from DriftTrak if no other stud lateral restraint is present.
  • For LRFD Design Strengths refer to ICC-ESR-2049.
DriftTrak Bypass DTSLB - Vertical Deflection - Load Direction

Load Direction

DriftTrak Bypass DTSLB - Vertical Deflection - Screw Pattern 1

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.

DriftTrak Bypass DTSLB - Vertical Deflection - Screw Pattern 2

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
DTLB362/400 (W/ Notches)
4 Screws
752
1,009
1,009
1,009
1,009
1,009
1,009
1,009
1,009
F2 Allowable Loads
DTLB362/400 (W/O Notches)
4 Screws
752
1,088
1,120
1,316
1,316
1,316
1,316
1,316
1,316
F2 Allowable Loads
DTLB600 & DTLB800(W/ Notches)
4 Screws
752
1,088
1,120
1,197
1,197
1,197
1,197
1,197
1,197
F2 Allowable Loads
DTLB600 & DTLB800(W/ Notches)
6 Screws
1,128
1,197
1,197
1,197
1,197
1,197
1,197
1,197
1,197
F2 Allowable Loads
DTLB600-HD & DTLB800-HD (Without Notches)
4 Screws
752
1,088
1,120
1,620
1,576
1,749
1,749
1,749
1,749
F2 Allowable Loads
DTLB600-HD & DTLB800-HD (Without Notches)
6 Screws
1,128
1,632
1,680
1,749
1,749
1,749
1,749
1,749
1,749
F3 Allowable Loads
DTLB362/400 & DTLB362/400-HD(Total Offset = 1")
4 Screws
227
329
339
490
477
688
940
940
1,163
F3 Allowable Loads
DTLB600 & DTLB600-HD (Total Offset = 1")
4 Screws
258
373
384
555
540
780
1,064
1,064
1,750
F3 Allowable Loads
DTLB600 & DTLB600-HD (Total Offset = 1")
6 Screws
308
446
459
664
646
933
1,274
1,274
1,750
F3 Allowable Loads
"DTLB800 & DTLB800-HD(Total Offset for 8" Studs = 1")(Total Offset for 6" Studs = 3")
4 Screws
226
326
336
486
473
683
932
932
1,272
F3 Allowable Loads
"DTLB800 & DTLB800-HD(Total Offset for 8" Studs = 1")(Total Offset for 6" Studs = 3")
6 Screws
263
381
392
567
552
797
1,088
1,088
1,272

Notes:

  • DTSLB and DTSLB-HD clips are manufactured to fi t into the DriftTrak and provide up to 2ʺ of vertical deflection (1ʺ up and 1ʺ down) while allowing free lateral movement of the structure.
  • DTLB and DTLB-HD clips are manufactured to fi t into the DriftTrak and provide a rigid connection to the stud while allowing free lateral movement of the structure.
  • Design loads are for attachment of DriftTrak DTSLB and DTSLB-HD to stud only. Load tables refl ect horizontal loads (F2).
  • Design loads are for attachment of DriftTrak DTLB and DTLB-HD to stud only. Load tables refl ect horizontal loads (F2) and vertical loads (F3).
  • Loads listed refl ect 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 eff ects 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.
  • Attachment to structure engineered by others.
  • Allowable loads have not been increased for wind, seismic, or other factors.
  • #12 screws are provided with DTSLB and DTSLB-HD clips for each step bushing for attachment to stud. Load requirements don’t always justify use of a third screw.
  • Use 8” DriftTrak fastener spacing to structure (or welded on each side of track) for DTLB and DTLB-HD clips. 8″ spacing or 16″ spacing can be used for DTSLB and DTSLB-HD clips. Size of fasteners or weld is engineered by others.
  • Notches are standard in DriftTrak DTSLB and DTLB. For greater F2 and F3 load capacities, use DTSLB-HD and DTLB-HD clips w/o notches. Refer to allowable load tables.
  • One row of bridging is recommended at a maximum distance of 18” from DriftTrak if no other stud lateral restraint is present.
  • Allow a minimum of 0.875ʺ from the structure to the inside fl ange of the bypassing stud to allow for track attachment.
  • Total Off set is measured as track fl ange width plus the gap from the open face of the track to the inside face of the stud. 
DriftTrak Bypass DTLB - No Vertical Deflection - Load Direction

DriftTrak DTLB - Load Direction

DriftTrak Bypass DTLB - No Vertical Deflection - 4 Hole Screw Pattern

4-Hole Screw Pattern

DriftTrak Bypass DTLB - No Vertical Deflection - 6 Hole Screw Pattern

6-Hole Screw Pattern

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