How to Guide

6/24/15 and supersedes all previous information. Pub. No. CD-ProSTUD 6/15
clarkdietrich.com
C O N N E C T I O N S
Head-of-wall vertical deep leg deflection track systems are required to allow the top of the wall stud to float within the top track legs.
This condition allows for vertical live load movement of the primary structure without transferring axial loads to the interior drywall studs.
A gap (determined by the Engineer of Record) is required between the top of the wall stud and the deflection track.
ProSTUD
®
Drywall Framing studs can be used with the three Deep Leg Track Systems listed below:
Details shown are for example only. The engineer of record of the project
is responsible for the design of the connection to the structure. Additional
connection details can be found at clarkdietrich.com.
ProTRAK
®
Deep Leg Track
ProTRAK deep leg track is available with leg lengths of 2," 2-1/2" and 3" long.
The wall studs are not fastened to the deflection track, and a row of lateral
bracing is required within 12" of the deep leg track to prevent rotation and
lateral movement of the studs. The deflection track system must be designed
for the end reaction of the wall studs (point loads) and for the specific gap
required for vertical deflection.
Structural Deep Leg Track (18ga & 16ga)
Structural Deep Leg Track systems are installed the same as the ProTRAK
deep leg track system but are designed to handle tall wall systems.
For structural deep leg track allowable loads, contact Technical Services at
888-437-3244 or visit clarkdietrich.com.
®
Slotted
Deflection Track and BlazeFrame
®
Integrated Fire
Stop System. Find more information on these
systems at clarkdietrich.com.
Slotted Deflection Track from ClarkDietrich
The slotted deflection track is attached to the wall studs through vertical
slots using wafer head screws, creating a positive connection that allows for
vertical movement and also eliminates the requirement for lateral bracing
near the top of the wall stud.
Deflection
track system
2" Leg Track
with 1/2" Gap
2-1/2" Leg Track
with 3/4" Gap
3" Leg Track
with 1" Gap
Allowable
load (lbs)
Limiting
wall height
Allowable
load (lbs)
Limiting
wall height
Allowable
load (lbs)
Limiting
wall height
Deflection
track system
ProSTUD 25
(15mil, 50ksi)
ProSTUD 20
(19mil, 65ksi)
ProSTUD
30mil (33ksi)
ProSTUD 25
33mil (33ksi)
Allowable
load (lbs)
Limiting
wall height
Allowable
load (lbs)
Limiting
wall height
Allowable
load (lbs)
Limiting
wall height
Allowable
load (lbs)
Limiting
wall height
MaxTrak 30MIL 45 13' 6" 85 25' 6" 148 44' 4" 148 44' 4"
MaxTrak 33MIL 52 15' 7" 99 29' 7" 156 46' 10" 156 46' 10"
D E E P L E G D E F L E C T I O N T R A C K S Y S T E M S
ProTRAK 25 36 10' 8" 24 7' 2" 18 5' 4"
ProTRAK 20 57 17' 2" 38 11' 5" 29 8' 7"
ProTRAK 30MIL 92 27' 6" 61 18' 4" 46 13' 9"
ProTRAK 33MIL 113 33' 10" 75 22' 7" 56 16' 11"
Complete information on Allowable Loads is available at clarkdietrich.com.
Notes:
– Limiting wall heights are based on studs spaced at 16" o.c. and an interior lateral load of 5psf.
– Stud members must be analyzed independently of the track system. Use www.iProSTUD.com to check
limiting wall heights for ProSTUD members.
– Stud failure modes relating to the deflection track connection (shear, web crippling, etc.) must be
checked separately.
Notes:
– Allowable loads are based on screws through the slots located 1-1/4" from the track web.
– #8 minimum wafer head screws shall be used for stud-track connection.
– The above table is applicable to ProSTUD members only. ProSTUD allowable heights must be checked also.
– Allowable heights are based on 5psf and wall stud spacing at 16" o.c. with a max. gap of 7/8."
ProTRAK® Allowable Lateral Loads and Wall Heights
MaxTrak
™
Allowable Lateral Loads and Wall Heights
17
(1) WAFER HEAD FRAMING
SCREW IN EACH STUD FLANGE.
PLACE IN CENTER OF SLOT.