Unistrut P4101 - 1-5/8" x 1-5/8", 14 Gauge Back-to-Back, Slotted
Metal Framing Channel

The Unistrut P4101 back-to-back channel has dimensions of 1-5/8" x 1-5/8" and a 14 ga (.075") wall. It is shorter than the P3301.

Resources

• P4101 Submittal PDF
• Related Channel Nuts
• Aluminum and Stainless Steel PDF
• Complete Unistrut Catalog

Elements of Section - P4101
Area of Section	0.579 in2 (3.7 cm2)
	Axis 1-1	Axis 2-2
Moment of Inertia (I)	0.117 in4 (4.9 cm4)	0.214 in4 (8.9 cm4)
Section Modulus (S)	0.143 in3 (2.3 cm3)	0.264 in3 (4.3 cm3)
Radius of Gyration (r)	0.449 in (1.1 cm )	0.608 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
P4101-10-GR	Perma-Green® III	10'	1.970 lbs.
P4101-20-GR	Perma-Green® III	20'	1.970 lbs.
P4101-10-PG	Pre-Galvanized Zinc	10'	1.970 lbs.
P4101-20-PG	Pre-Galvanized Zinc	20'	1.970 lbs.
P4101-10-HG	Hot-Dipped Galvanized	10'	2.056 lbs.
P4101-20-HG	Hot-Dipped Galvanized	20'	2.056 lbs.
P4101-10-ZD	Perma-Gold™	10'	1.970 lbs.
P4101-20-PL	Plain	10'	1.970 lbs.
P4101-10-PL	Plain	20'	1.970 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

Column Loading - P4101
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	3,240	12,370	11,950	11,370	10,540
36	3,120	11,470	10,540	9,160	7,720
48	2,940	10,090	8,680	6,770	4,980
60	2,680	8,560	6,770	4,590	3,190
72	2,310	7,010	4,980	3,190	2,220
84	1,950	5,530	3,660	2,340	*
96	1,650	4,250	2,800	*	*
108	1,410	3,360	2,220	*	*
*KL/r > 200 See notes below for more information

Beam Loading - P4101
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	*1,090	0.06	*1,090	*1,090	*1,090	1.00
36	800	0.14	800	800	570	1.00
48	600	0.25	600	480	320	1.00
60	480	0.39	410	310	200	0.96
72	400	0.57	280	210	140	0.92
84	340	0.76	210	160	100	0.89
96	300	1.00	160	120	80	0.85
108	270	1.29	130	90	60	0.81
120	240	1.57	100	80	50	0.78
144	200	2.26	70	50	40	0.71
168	170	3.05	50	40	30	0.64
192	150	4.02	40	-	-	0.57
216	130	4.96	-	-	-	0.50
240	120	6.28	-	-	-	0.45
*Load limited by weld shear 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
P4101T

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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