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> PrimeWall® EQ Stud - SFIA Certified

PrimeWall® EQ Stud - SFIA Certified

TSN's SFIA Certified PrimeWall® EQ Studs are used in non-load-bearing wall systems that support gypsum board construction. PrimeWall EQ Studs are equivalent to 20 gauge non-structural drywall studs, allowing you to use less material. Each PrimeWall EQ Stud is manufactured from mill-certified steel meeting material composition requirements listed below.

PrimeWall EQ Studs contain knurled flanges for fast fastener placement when attaching wallboard. Pre-punched knockouts are spaced at regular intervals for rapid installation of bridging, electrical wiring, and plumbing.

Value:

  • Knurled flanges with no grooves or ribs to interfere with screw placement
  • Wide flanges for increased target area for screws to hit
  • Material is optimized with decreased mil thickness, while maintaining higher strength and stiffness
  • Strengthened with increased yield strength and deeper lip
PrimeWall EQ Stud
SFIA Code Compliant Label
Check the latest list of SFIA Certified Production Facilities at Architectural Testing, Inc.’s Website.
Downloads Download Technical data Tech Sheet |

Product Information

Section Lbs/Ft Pcs/Skid Lbs/Skid
362PWS134-19NS, 55ksi 0.471 300 1404
600PWS134-21NS, 55ksi 0.699 200 1260
PrimeWall EQ Stud Dimensions
 
Physical Properties of Non-Standard Non-Structural CFS Framing Members
Section Similar to SFIA Mil
Thickness
Design
Thickness
Gross Properties Effective Properties Moments
Area Weight Ix Rx Iy Ry Ix Sx Allowable
Ma
Nominal
Mn
Dist. Buck.
Mnd
Unbraced
Length Lu
(mils) (in.) (in.2) (lbs/ft) (in.4) (in.) (in.4) (in.) (in.4) (in.3) (in-k) (in-k) (in-k) (in.)
362PWS134-19NS, 55ksi 362S125-30 19 0.0200 0.138 0.471 0.283 1.430 0.035 0.504 0.254 0.094 3.09 5.17 5.34 26.6
600PWS134-21NS, 55ksi1 600S125-30 21 0.0221 0.205 0.699 1.027 2.237 0.045 0.466 0.851 0.169 5.57 9.29 10.59 25.7

Notes:

  1. Section properties and nominal moments are based on AISI S100-07.
  2. Superscript "1" denotes that the web height-to-thickness ratio exceeds 260.
  3. Strength increase due to cold-work of forming is not considered in the analysis.
  4. Standard punchouts are considered in the calculation of nominal moments,
  5. Rotational stiffness (kΦ) is taken equals to zero for calculation of the distortional buckling moment.
  6. PWS stud is considered fully braced when the unbraced length is less than the listed Lu.
Allowable Ceiling Spans
Section Similar to SFIA Fy 4 psf 6 psf
Lateral Support of Compression Flange Lateral Support of Compression Flange
Unsupported Midspan Unsupported Midspan
Joist Spacing (in.) o.c. Joist Spacing (in.) o.c. Joist Spacing (in.) o.c. Joist Spacing (in.) o.c.
  12 16 24 12 16 24 12 16 24 12 16 24
L/240
362PWS134-19NS, 55ksi 362S125-30 55 10' 4" f 9' 7" f 8' 7" f 14' 3" f 13' 1" f 11' 8" f 9' 3" f 8' 7" f 7' 8" f 12' 8" f 11' 8" f 10' 4" f
600PWS134-21NS, 55ksi 600S125-30 55 12' 6" f 11' 7" f 10' 5" f 17' 4" f 16' 0" f 14' 4" f 11' 3" f 10' 5" f 9' 4" f 15' 6" f 14' 4" f 12' 10" f
L/360
362PWS134-19NS, 55ksi 362S125-30 55 10' 4" f 9' 7" f 8' 7" f 14' 0" 12' 9" 11' 1" 9' 3" f 8' 7" f 7' 8" f 12' 3" 11' 1" 9' 8"
600PWS134-21NS, 55ksi 600S125-30 55 12' 6" f 11' 7" f 10' 5" f 17' 4" f 16' 0" f 14' 4" f 11' 3" f 10' 5" f 9' 4" f 15' 6" f 14' 4" f 12' 10" f

Notes:

  1. "f": flexure controls, "s": shear controls. No letter next to the allowable span means deflection controls.
  2. All values are based on total load of assembly, not including storage or accessible ceilings.
  3. All values are for simple spans, with compression flange either unbraced or braced at midspan.
Allowable Loads for Screw Connections (pounds per screw)
Member Style
(Thickness designator)
Design
Thickness
Min.
Thickness
Yield Tensile #6 Screw (0.138" dia.; 1/4" head) #8 Screw (0.164" dia.; 5/16" head) #10 Screw (0.190" dia.; 0.340" head) C645 Screw Test
Fy Fu Shear Pullout Pullover Shear Pullout Pullover Shear Pullout Pullover (P, F)
(in.) (in.) (ksi) (lbs/ft) (in.4) (in.) (in.4) (in.) (in.4) (in.3) (in-k) (in-k) (in-k)
19 0.019 0.02 55 70 97 55 175 112 65 219 121 75 238 Pass
21 0.021 0.0221 55 70 107 60 193 127 72 242 140 83 263 Pass

Notes:

  1. Data is based on calculated values in accordance with AISI S100-07 Section E4 for equal thicknesses joined together..
  2. Pullover capacities are based on concentrically loaded connections that produce a uniform pull-over force on the fastener.
  3. The edge distance, e, is taken as 1.5 times the screw shank diameter.
  4. The design thickness, t, is used in the calculation of the allowable pullout strength
  5. The effective pullover resistance diameter, d'w, is taken as the screw head diameter.
  6. C645 screw penetration test is based on 3rd party independent testing.

PrimeWall® EQ studs are made of cold-formed steel coils conforming to ASTM A653/A 653M Structural Steel Grade 55 (380), with 55ksi (380MPa) minimum yield strength and 70ksi (480MPa) minimum tensile strength. Coating is G40 (Z120) hot-dipped galvanized, or equivalent conforming to ASTM C 645. Steel material with G60 and G90 coating are available upon request.

Non-Composite Fully Braced Walls
Member
(name)
Lu Spacing 5 psf 7.5 psf 10 psf
(in. o.c.) L/120 L/240 L/360 L/120 L/240 L/360 L/120 L/240 L/360
362PWS134-19NS, 55ksi 26.64 12 18' 9" 14' 11" 13' 0" 16' 5" 13' 0" 11' 4" 14' 4" f 11' 10" 10' 4"
26.64 16 17' 1" 13' 6" 11' 10" 14' 4" f 11' 10" 10' 4" 12' 5" f 10' 9" 9' 4"
26.64 24 14' 4" f 11' 10" 10' 4" 11' 8" f 10' 4" 9' 0" 10' 1" f 9' 4" 8' 2"
600PWS134-21NS, 55ksi 25.70 12 27' 2" f 22' 4" 19' 6" 22' 2" f 19' 6" 17' 0" 19' 3" f 17' 8" 15' 5"
25.70 16 23' 7" f 20' 3" 17' 8" 19' 3" f 17' 8" 15' 5" 16' 8" f 16' 1" 14' 0"
25.70 24 19' 3" f 17' 8" 15' 5" 15' 8" f 15' 5" 13' 6" 13' 7" f 13' 7" f 12' 3"

Notes:

  1. "f": flexure controls, "s": shear controls. No letter next to the allowable height means deflection controls.
  2. All values are calculated based on AISI S100-07: steel properties only.
  3. Web crippling is not considered.
  4. Based on bracing of the stud not to exceed Lu.
  5. The factory punchouts are in accordance with AISI S201-07 Section C5. The distance from the center of the last punchout to the end of the stud is 12".
Non-Composite Walls Braced at 4' on Center
Member
(name)
Spacing 5 psf 7.5 psf 10 psf
(in. o.c.) L/120 L/240 L/360 L/120 L/240 L/360 L/120 L/240 L/360
362PWS134-19NS, 55ksi 12 18' 5" f 14' 11" 13' 0" 15' 0" f 13' 0" 11' 4" 13' 0" f 11' 10" 10' 4"
16 15' 11" f 13' 6" 11' 10" 13' 0" f 11' 10" 10' 4" 11' 3" f 10' 9" 9' 4"
24 13' 0" f 11' 10" 10' 4" 10' 7" f 10' 4" 9' 0" 9' 2" f 9' 2" f 8' 2"
600PWS134-21NS, 55ksi 12 27' 0" f 22' 4" 19' 6" 22' 1" f 19' 6" 17' 0" 19' 1" f 17' 8" 15' 5"
16 23' 5" f 20' 3" 17' 8" 19' 1" f 17' 8" 15' 5" 16' 6" f 16' 1" 14' 0"
24 19' 1" f 17' 8" 15' 5" 15' 7" f 15' 5" 13' 6" 13' 6" f 13' 6" f 12' 3"

Notes:

  1. "f": flexure controls, "s": shear controls. No letter next to the allowable height means deflection controls.
  2. All values are calculated based on AISI S100-07: steel properties only.
  3. Web crippling is not considered.
  4. Values based on discrete bracing of 48" o.c. restraining lateral and lateral/torsional buckling.
  5. The factory punchouts are in accordance with AISI S201-07 Section C5. The distance from the center of the last punchout to the end of the stud is 12".
 
Composite Limiting Heights with 5/8" Type X Gypsum Board
Section Similar to SFIA Spacing 5 psf 7.5 psf 10 psf
(in o.c.) L/120 L/240 L/360 L/120 L/240 L/360 L/120 L/240 L/360
362PWS134-19NS, 55ksi 362S125-30 12 22' 7" 18' 7" 16' 4" 19' 8" 16' 3" 14' 3" 17' 11" 14' 9" 12' 11"
16 20' 6" 16' 11" 14' 10" 17' 11" 14' 9" 12' 11" 16' 2" f 13' 5" 11' 9"
24 17' 11" 14' 9" 12' 11" 15' 3" f 12' 11" 11' 2" 13' 3" f 11' 9" 9' 11"
600PWS134-21NS, 55ksi1 600S125-30 12 30' 3" 26' 9" 23' 5" 26' 10" 23' 4" 20' 5" 24' 2" f 21' 2" 18' 7"
16 27' 9" 24' 3" 21' 3" 24' 2" f 21' 2" 18' 7" 20' 11" f 19' 3" 16' 10"
24 24' 2" f 21' 2" 18' 7" 19' 9" f 18' 6" 16' 3" 17' 1" f 16' 10" 14' 7"

Notes:

  1. Composite limiting heights are based on testing according to ICC-ES AC86-2010.
  2. Composite limiting heights are based on gypsum board applied full height to each stud flange and installed using minimum No. 6 Type S Drywall screws.
  3. No fasteners are required for attaching the stud to the track, except as required by ASTM C754.
  4. 'f' adjacent to the height value indicates that flexural stress controls the allowable wall height.
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.
PrimeWall® EQ Stud and the rest of TSN's Drywall Framing Products can be found in the following Catalogs:

TSN_PrimeWall_Technical_Catalog

TSN PrimeWall Member
Technical Catalog

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TSN PrimeWall Member
Order Catalog

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