PrimeWall® EQ Stud

The PrimeWall® EQ Studs are used in non-load-bearing wall systems that support gypsum board construction. PrimeWall EQ Studs replace 20 gauge non-structural drywall studs in most applications, 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 groves or ribs to interfere with screw placement
  • Wide flanges for increased target area for screws to hit
  • Material is lessened with decreased mil thickness
  • Strengthened with increased yield and deeper lip
  • PrimeWall EQ Studs meet the requirements of Section 5.1 of ASTM C645 for Strength
  • PrimeWall EQ Studs comply with Screw Penetration requirements in paragraph 9.1 and Section 10 of ASTM C645

 

 PrimeWall® EQ Stud
  
Downloads: Download Technical data Tech Sheet |
  • Quantity / Order Info
  • Physical and Structural Properties
  • Material Composition
  • Screw Design
  • Screw Penetration
Section
 Lbs/Ft Pcs/Skid Lbs/Skid
162PWS-20EQ 0.332
 400 1328
250PWS-20EQ 0.392 400 1568
362PWS-20EQ 0.468 300 1404
400PWS-20EQ 0.494 300 1482
600PWS-20EQ 0.630 200 1260

 

 

 

PrimeWall EQ Stud Dimensions

 
Stud Member Design Thickness Min. Thickness Gross Properties Effective Properties at 50 ksi Torsional Properties
Area Weight Ix Sx Rx Iy Ry Ix Sx Ma Va Jx1000 Cw Xo Ro Beta m
(in.) (in.) (in.2) (lbs/ft) (in.4) (in.3) (in.) (in.4) (in.) (in.4) (in.3) (lbs.in.) (lbs) (in.4) (in.6) (in.) (in.) (in.)
162PWS-20EQ 0.0200 0.0190 0.098 0.332 0.045 0.055 0.677 0.026 0.517 0.041 0.041 1241 421 0.013 0.021 -1.296 1.551 0.303 0.744
250PWS-20EQ 0.0200 0.0190 0.115 0.392 0.119 0.095 1.017 0.031 0.515 0.111 0.077 2311 311 0.015 0.045 -1.151 1.620 0.495 0.684
362PWS-20EQ 0.0200 0.0190 0.138 0.468 0.280 0.155 1.427 0.035 0.502 0.262 0.103 3082 208 0.018 0.094 -1.010 1.819 0.692 0.622
400PWS-20EQ 0.0200 0.0190 0.145 0.494 0.355 0.177 1.563 0.037 0.502 0.325 0.114 3432 188 0.019 0.116 -0.971 1.903 0.739 0.603
600PWS-20EQ* 0.0200 0.0190 0.185 0.630 0.924 0.308 2.234 0.040 0.465 0.763 0.186 5576 123 0.025 0.283 -0.810 2.422 0.888 0.524

 

Notes:

  • Section properties are calculated in accordance with AISI NASPEC 2001 with 2004 Supplement.
  • Tabulated gross properties are based on the full, unreduced cross section of the stud away from punchouts.
  • Effective section properties don't incorporate strength increase from cold work of forming.
  • Effective moment of inertia Ix is calculated at a stress = 0.6 Fy.

    * Web height-to-thickness ratio exceeds 260. Web stiffeners are required at all bearing end and intermediate locations.

PrimeWall® EQ studs are made of cold-formed steel coils conforming to ASTM A 1003/A 1003M Structural Steel Grade 50 (340), with 50ksi (340MPa) minimum yield strength and 65ksi (450MPa) 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.

PrimeWall® EQ Stud (19 mil) Allowable Screw Design Values

Stud Member

 Design Thickness Min.
Thickness		 Yield Tensile #6 Screw (0.138" dia.) #8 Screw (0.164" dia.) #10 Screw (0.190" dia.)
Fy Fu Shear Pullout Shear Pullout Shear Pullout
(in.) (in.) (ksi) (ksi) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs)
PWS-20EQ 0.0200 0.0190 50 65 96 51 104 60 112 70

 

 

PrimeWall® EQ Stud (19 mil) Screw Penetration Test (ASTM C645-09a, ASTM C1002)

Stud Member

 Sheathing Screw Drill Speed (RPM) ASTM C 645 Section 10*
PWS-20EQ Gypsum Board 5/8" Type X #6 x 1 1/4" Type S Sharp Point 4000 Pass

* Studs must be capable of pulling the head of the screw below surface of gypsum board in less than 2 sec. without spin out.

PrimeWall® EQ Studs comply with Screw Penetration requirements in paragraph 9.1 and Section 10 of ASTM C645