TSN Product: PrimeWall® EQ Stud

PrimeWall^® EQ Stud

The 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
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	362PWS134-19NS, 55ksi & 600PWS134-21NS, 55ksi are Certified by SFIA. Click here for more information.

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Tech Sheet |

Quantity / Order Info
Physical Properties
Allowable Ceiling Spans
Allowable Loads for Screw Connections
Material Composition
Non-Composite Walls

Section	Lbs/Ft	Pcs/Skid	Lbs/Skid
162PWS134-21NS, 55ksi	0.346	400	1328
250PWS134-19NS, 55ksi	0.395	400	1568
362PWS134-19NS, 55ksi	0.471	300	1404
400PWS134-19NS, 55ksi	0.497	300	1482
600PWS134-21NS, 55ksi	0.699	200	1260

Physical Properties of Non-Standard Non-Structural CFS Framing Members
Section	Mil Thickness	Design Thickness	Gross Properties						Effective Properties		Moments
	Mil Thickness	Design Thickness	Area	Weight	I_x	R_x	I_y	R_y	I_x	S_x	Allowable M_a	Nominal M_n	Dist. Buck. M_nd	Unbraced Length L_u
	(mils)	(in.)	(in.²)	(lbs/ft)	(in.⁴)	(in.)	(in.⁴)	(in.)	(in.⁴)	(in.³)	(in-k)	(in-k)	(in-k)	(in.)
162PWS134-21NS, 55ksi	21	0.0221	0.102	0.346	0.048	0.689	0.025	0.493	0.041	0.037	1.21	2.02	2.17	24.7
250PWS134-19NS, 55ksi	19	0.0200	0.116	0.395	0.120	1.019	0.031	0.517	0.110	0.073	2.15	4.04	3.60	27.3
362PWS134-19NS, 55ksi	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
400PWS134-19NS, 55ksi	19	0.0200	0.146	0.497	0.356	1.562	0.036	0.498	0.313	0.104	3.43	5.72	5.92	26.5
600PWS134-21NS, 55ksi¹	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:

Section properties and nominal moments are based on AISI S100-07.
Superscript "1" denotes that the web height-to-thickness ratio exceeds 260.
Strength increase due to cold-work of forming is not considered in the analysis.
Standard punchouts are considered in the calculation of nominal moments,
Rotational stiffness (k_Φ) is taken equals to zero for calculation of the distortional buckling moment.
PWS stud is considered fully braced when the unbraced length is less than the listed L_u.

Allowable Ceiling Spans

Section

F_y

4 psf

6 psf

Lateral Support of Compression Flange

Unsupported

Midspan

Unsupported

Midspan

Joist Spacing (in.) o.c.

L/240

162PWS134-21NS, 55ksi

8' 1" f

7' 6" f

6' 7" f

8' 9"

7' 11"

6' 11"

7' 3" f

6' 7" f

5' 10" f

7' 8"

6' 11"

6' 1"

250PWS134-19NS, 55ksi

9' 6" f

8' 9" f

7' 11" f

12' 1"

11' 0"

9' 7"

8' 6" f

7' 11" f

7' 1" f

10' 7"

9' 7"

8' 5"

362PWS134-19NS, 55ksi

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

400PWS134-19NS, 55ksi

10' 7" f

9' 10" f

8' 10" f

14' 8" f

13' 6" f

12' 0" f

9' 6" f

8' 10" f

7' 11" f

13' 0" f

12' 0" f

10' 8" f

600PWS134-21NS, 55ksi

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

162PWS134-21NS, 55ksi

7' 8"

6' 11"

6' 1"

7' 8"

6' 11"

6' 1"

6' 8"

6' 1"

5' 3"

6' 8"

6' 1"

5' 3"

250PWS134-19NS, 55ksi

9' 6" f

8' 9" f

7' 11" f

10' 7"

9' 7"

8' 5"

8' 6" f

7' 11" f

7' 1" f

9' 3"

8' 5"

7' 4"

362PWS134-19NS, 55ksi

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"

400PWS134-19NS, 55ksi

10' 7" f

9' 10" f

8' 10" f

14' 8" f

13' 6" f

11' 11"

9' 6" f

8' 10" f

7' 11" f

13' 0" f

11' 11"

10' 5"

600PWS134-21NS, 55ksi

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:

"f": flexure controls, "s": shear controls. No letter next to the allowable span means deflection controls.
All values are based on total load of assembly, not including storage or accessible ceilings.
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
	Design Thickness	Min. Thickness	F_y	F_u	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)	(P, F)
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:

Data is based on calculated values in accordance with AISI S100-07 Section E4 for equal thicknesses joined together..
Pullover capacities are based on concentrically loaded connections that produce a uniform pull-over force on the fastener.
The edge distance, e, is taken as 1.5 times the screw shank diameter.
The design thickness, t, is used in the calculation of the allowable pullout strength
The effective pullover resistance diameter, d'w, is taken as the screw head diameter.
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)	L_u	Spacing	5 psf			7.5 psf			10 psf
Member (name)	L_u	(in. o.c.)	L/120	L/240	L/360	L/120	L/240	L/360	L/120	L/240	L/360
162PWS134-21NS, 55ksi	24.74	12	10' 3"	8' 1"	7' 1"	8' 11"	7' 1"	6' 2"	8' 1"	6' 5"	5' 7"
	24.74	16	9' 4"	7' 4"	6' 5"	8' 1"	6' 5"	5' 7"	7' 4"	5' 10"	5' 1"
	24.74	24	8' 1"	6' 5"	5' 7"	7' 1"	5' 7"	4' 11"	6' 4" f	5' 1"	4' 5"
250PWS134-19NS, 55ksi	27.29	12	14' 2"	11' 3"	9' 10"	12' 5"	9' 10"	8' 7"	11' 3"	8' 11"	7' 9"
	27.29	16	12' 10"	10' 3"	8' 11"	11' 3"	8' 11"	7' 9"	10' 3"	8' 1"	7' 1"
	27.29	24	11' 3"	8' 11"	7' 9"	9' 9" f	7' 9"	6' 10"	8' 5" f	7' 1"	6' 2"
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"
400PWS134-19NS, 55ksi	26.48	12	20' 2"	16' 0"	13' 11"	17' 5" f	13' 11"	12' 2"	15' 1" f	12' 8"	11' 1"
	26.48	16	18' 4"	14' 6"	12' 8"	15' 1" f	12' 8"	11' 1"	13' 1" f	11' 6"	10' 1"
	26.48	24	15' 1" f	12' 8"	11' 1"	12' 4" f	11' 1"	9' 8"	10' 8" f	10' 1"	8' 9"
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:

"f": flexure controls, "s": shear controls. No letter next to the allowable height means deflection controls.
All values are calculated based on AISI S100-07: steel properties only.
Web crippling is not considered.
Based on bracing of the stud not to exceed L_u.
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
Member (name)	(in. o.c.)	L/120	L/240	L/360	L/120	L/240	L/360	L/120	L/240	L/360
162PWS134-21NS, 55ksi	12	10' 3"	8' 1"	7' 1"	8' 11"	7' 1"	6' 2"	7' 11" f	6' 5"	5' 7"
	16	9' 4"	7' 4"	6' 5"	7' 11" f	6' 5"	5' 7"	6' 11" f	5' 10"	5' 1"
	24	7' 11" f	6' 5"	5' 7"	6' 6" f	5' 7"	4' 11"	5' 7" f	5' 1"	4' 5"
250PWS134-19NS, 55ksi	12	14' 2"	11' 3"	9' 10"	12' 5"	9' 10"	8' 7"	11' 3"	8' 11"	7' 9"
	16	12' 10"	10' 3"	8' 11"	11' 3"	8' 11"	7' 9"	9' 11" f	8' 1"	7' 1"
	24	11' 3"	8' 11"	7' 9"	9' 5" f	7' 9"	6' 10"	8' 1" f	7' 1"	6' 2"
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"
400PWS134-19NS, 55ksi	12	19' 4" f	16' 0"	13' 11"	15' 9" f	13' 11"	12' 2"	13' 8" f	12' 8"	11' 1"
	16	16' 9" f	14' 6"	12' 8"	13' 8" f	12' 8"	11' 1"	11' 10" f	11' 6"	10' 1"
	24	13' 8" f	12' 8"	11' 1"	11' 2" f	11' 1"	9' 8"	9' 8" f	9' 8" f	8' 9"
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:

"f": flexure controls, "s": shear controls. No letter next to the allowable height means deflection controls.
All values are calculated based on AISI S100-07: steel properties only.
Web crippling is not considered.
Values based on discrete bracing of 48" o.c. restraining lateral and lateral/torsional buckling.
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".