Unistrut P4001 - 1-5/8" x 1-5/8", 16 Gage, Back-to-Back
Metal Framing Channel

The P4001 is a 1-5/8" x 1-5/8" back-to-back Unistrut channel with a 16 ga (.060") wall. It is shorter than the P3301.

Resources

• P4001 Submittal PDF
• Related Channel Nuts
• Aluminum and Stainless Steel PDF
• Complete Unistrut Catalog

Elements of Section - P4001
Area of Section	0.487 in2 (3.1 cm2)
	Axis 1-1	Axis 2-2
Moment of Inertia (I)	0.104 in4 (4.3 cm4)	0.183 in4 (7.6 cm4)
Section Modulus (S)	0.128 in3 (2.1 cm3)	0.225 in3 (3.7 cm3)
Radius of Gyration (r)	0.462 in (1.2 cm )	0.613 in (1.6 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
P4001-10-GR	Perma-Green® III	10'	1.660 Lbs.
P4001-20-GR	Perma-Green® III	20'	1.660 Lbs.
P4001-10-PG	Pre-Galvanized Zinc	10'	1.660 Lbs.
P4001-20-PG	Pre-Galvanized Zinc	20'	1.660 Lbs.
P4001-10-HG	Hot-Dipped Galvanized	10'	1.738 Lbs.
P4001-20-HG	Hot-Dipped Galvanized	20'	1.738 Lbs.
P4001-10-PL	Plain	10'	1.660 Lbs.
P4001-20-PL	Plain	20'	1.660 Lbs.
P4001-10-EA	Extruded Aluminum	10'	0.660 Lbs.
P4001-20-EA	Extruded Aluminum	20'	0.660 Lbs.
P4001-20-SS	Stainless Steel (304)	20'	1.660 Lbs.
View the Unistrut Finish Specifications PDF for detailed specifications on all finishes. GR = Perma-Green® III PG = Pre-Galvanized Zinc ZD = Perma-Gold™ HG = Hot-Dipped Galvanized PL = Plain EA = Extruded Aluminum SS = Stainless Steel (304)

Column Loading - P4001
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	2,830	10,390	10,000	9,470	8,960
36	2,740	9,530	8,960	7,870	6,700
48	2,590	8,620	7,480	5,910	4,440
60	2,340	7,380	5,910	4,090	2,840
72	2,020	6,110	4,440	2,840	1,970
84	1,700	4,880	3,260	2,090	*
96	1,440	3,780	2,500	*	*
108	1,230	2,990	1,970	*	*
*KL/r > 200 See notes below for more information

Beam Loading - P4001
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	*810	0.05	*810	*810	*810	1.00
36	710	0.14	710	710	500	1.00
48	540	0.25	540	430	280	0.98
60	430	0.40	360	270	180	0.93
72	360	0.57	250	190	130	0.88
84	310	0.78	190	140	90	0.83
96	270	1.02	140	110	70	0.79
108	240	1.29	110	80	60	0.74
120	210	1.54	90	70	50	0.69
144	180	2.29	60	50	30	0.60
*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
P4003	P4004

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