Unistrut P3301 - 1-5/8" x 1 3/4", 12 Gauge Back-to-Back
Metal Framing Channel

The Unistrut P3301 is a back-to-back channel with dimensions of 1-5/8" x 1-3/4" and a 12 ga (.105") wall. It shorter than both the P1001 and P3001.

Resources

• P3301 Submittal PDF
• Related Channel Nuts
• Aluminum and Stainless Steel PDF
• Complete Unistrut Catalog

Elements of Section - P3301
Area of Section	0.790 in2 (5.1 cm2)
	Axis 1-1	Axis 2-2
Moment of Inertia (I)	0.176 in4 (7.3 cm4)	0.285 in4 (11.9 cm4)
Section Modulus (S)	0.201 in3 (3.3 cm3)	0.351 in3 (5.8 cm3)
Radius of Gyration (r)	0.472 in (1.2 cm )	0.601 in (1.5 cm )

Raw steel conforms to the following ASTM specifications:

GAUGE	FINISH	ASTM NO.
12	GR & HG	A1011 SS GR 33
	PG	A653 GR 33
14	GR & HG	A1011 SS GR 33
	PG	A653 GR 33
16	GR & HG	A1011 SS GR 33
	PG	A653 GR 33
19	GR	A1008
GR = Perma-Green® III PG = Pre-Galvanized Zinc HG = Hot-Dipped Galvanized

 

Part No.	Finish	Length (ft)	Weight Per Foot
P3301-10-GR	Perma-Green® III	10'	2.690 lbs.
P3301-20-GR	Perma-Green® III	20'	2.690 lbs.
P3301-10-PG	Pre-Galvanized Zinc	10'	2.690 lbs.
P3301-20-PG	Pre-Galvanized Zinc	20'	2.690 lbs.
P3301-10-HG	Hot-Dipped Galvanized	10'	2.862 lbs
P3301-20-HG	Hot-Dipped Galvanized	20'	2.862 lbs
P3301-10-ZD	Perma-Gold™	10'	2.690 lbs.
P3301-20-ZD	Perma-Gold™	20'	2.690 lbs.
P3301-10-PL	Plain	10'	2.690 lbs.
P3301-20-PL	Plain	20'	2.690 lbs.
P3301-10-SS	Stainless Steel (304)	10'	2.690 lbs.
P3301-20-SS	Stainless Steel (304)	20'	2.690 lbs.
P3301-20-ST	Stainless Steel (316)	20'	2.690 lbs.
View the Unistrut Finish Specifications PDF for detailed specifications on all finishes. GR = Perma-Green® III PG = Pre-Galvanized Zinc HG = Hot-Dipped Galvanized ZD = Perma-Gold™ PL = Plain SS = Stainless Steel (304) ST = Stainless Steel (316)

Column Loading - P3301
Unbraced Height (in)	Allowable Load at Slot Face (lbs)	Max Column Load Applied at C.G.
		K=0.65 (lbs)	K=0.80 (lbs)	K=1.0 (lbs)	K=1.2 (lbs)
24	4,290	16,990	16,580	15,770	14,720
36	4,150	15,890	14,720	12,980	11,120
48	3,940	14,160	12,360	9,880	7,510
60	3,650	12,210	9,880	6,940	4,820
72	3,270	10,190	7,510	4,820	3,350
84	2,800	8,220	5,530	3,540	*
96	2,410	6,420	4,240	*	*
108	2,080	5,070	3,350	*	*
*KL/r > 200 See notes below for more information

Beam Loading - P3301
Span (in)	Max Allowable Uniform Load (lbs)	Defl at Uniform load (in)	Uniform Loading at Deflection			Lateral Bracing Reduction Factor
			Span /180 (lbs)	Span /240 (lbs)	Span /360 (lbs)
24	1,690	0.06	1,690	1,690	1,690	1.00
36	1,130	0.13	1,130	1,130	860	1.00
48	840	0.23	840	720	480	1.00
60	680	0.37	620	460	310	1.00
72	560	0.52	430	320	210	0.97
84	480	0.71	310	240	160	0.95
96	420	0.93	240	180	120	0.92
108	380	1.20	190	140	100	0.90
120	340	1.47	150	120	80	0.87
144	280	2.09	110	80	50	0.82
See notes below for more information

Notes:

1. Beam loads are given in total uniform load (W Lbs) not uniform load (w lbs/ft or w lbs/in).

2. Beam loads are based on a simple span and assumed to be adequately laterally braced. Unbraced spans can reduce beam load carrying capacity. Refer to the linked page for reduction factors for unbraced lengths from 2 to 20 feet.

3. For pierced channel, multiply beam loads by the following factor:

• "KO" Series .......95%
• "T" Series ..........85%
• "HS" Series .......90%
• "SL" Series ........85%
• "H3" Series ........90%
• "DS" Series ........70%

4. Deduct channel weight from the beam loads.

5. For concentrated midspan point loads, multiply beam loads by 50% and the corresponding deflection by 80%. Follow this link for information regarding other load conditions.

6. All beam loads are for bending about Axis 1-1.

Sample calculation #1:

Here is a sample calculation to demonstrate the beam loading charts, and the load reduction factors.

Say we have an 6’ span of P1000sl, and want to see what the load capacity is for a point load.

Per the charts, P1000 is good for a maximum allowable uniform load (not load per foot) of 560 lbs. In referencing the notes below, we have the following load reductions:

- X .85 for the sl

- X .5 for a point load in the center

- X .78 load reduction per page 56

Therefore 560 lbs x .85 x .5 x .78 = 185 lbs.

Sample Calculation #2.

Say we have a 5’ span of P1001, and want to see the load capacity for a point load.

Per the charts, p1001 is good for a maximum allowable uniform load (not load per foot) of 1,910 lbs. In referencing the notes below, we have the following load reductions:

- X .5 for a point load in the center

- X .97 load reduction

Therefore 1,910 lbs x .5 x. 97 = 926 lbs.

Note that these assume that the strut connection is able to handle the load. It is the responsibility of you and your Engineer to review all calculations and connections, and to verify that all items are installed per Unistrut requirements. Unistrut Service Company takes no responsibility for the misuse of information provided. Local codes may dictate more stringent requirements.

Available Piercings and Combinations

P3301T

Dimensional Data for Pierced & Slotted Channels:

DS = Double Slotted. Slots are 2-3/4" (70mm) x 7/8" (22mm). 3-1/2"(89mm) on Center with 3/4"(19mm) spacing between slots.
HS = Round Holes on one side. Holes are 9/16" (14mm) in Diameter. 1-7/8" (48mm) on Center.
H3 = Round Holes on all three sides. Holes are 9/16" (14mm) in Diameter. 1-7/8" (48mm) on Center.
KO = Knockouts. Knockouts are 7/8" (22mm) in Diameter. 6" (152mm) on Center.
SL = Long Slots. Slots are 3" (76mm) x 13/32" (10.3mm). 4"(102mm) on Center.
T = Slotted. Slots are 1-1/8" (29mm) x 9/16" (14mm). 2"(51mm) on Center.

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