Unistrut P5501 - 1-5/8" x 4 7/8", 12 Gauge, Back-to-Back, Solid
Metal Framing Channel

The Unistrut P5501 is a 1-5/8" x 4-7/8" back-to-back channel. It has a 12 ga (.105") wall and is shorter than P5001 but taller than the P1001.

Resources

• P5501 Submittal PDF
• Related Channel Nuts
• Aluminum and Stainless Steel PDF
• Complete Unistrut Catalog

Elements of Section - P5501
Area of Section	1.452 in2 (9.4 cm2)
	Axis 1-1	Axis 2-2
Moment of Inertia (I)	2.805 in4 (116.8 cm4)	0.669 in4 (27.8 cm4)
Section Modulus (S)	1.151 in3 (18.9 cm3)	0.823 in3 (13.5 cm3)
Radius of Gyration (r)	1.390 in (3.5 cm )	0.679 in (1.7 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
P5501-10-GR	Perma-Green® III	10'	4.940 lbs.
P5501-20-GR	Perma-Green® III	20'	4.940 lbs.
P5501-10-PG	Pre-Galvanized Zinc	10'	4.940 lbs.
P5501-20-PG	Pre-Galvanized Zinc	20'	4.940 lbs.
P5501-10-HG	Hot-Dipped Galvanized	10'	4.940 lbs.
P5501-20-HG	Hot-Dipped Galvanized	20'	5.236 lbs.
P5501-20-ZD	Perma-Gold™	20'	4.940 lbs.
P5501-10-PL	Plain	10'	4.940 lbs.
P5501-20-PL	Plain	20'	4.940 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 - P5501
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	8,580	31,810	30,880	29,520	28,100
36	8,350	29,700	28,100	26,000	24,070
48	8,080	27,390	25,330	22,910	20,940
60	7,720	25,170	22,910	20,510	17,170
72	7,270	23,190	20,940	17,170	12,700
84	6,780	21,510	18,740	13,430	9,330
96	6,130	20,110	15,630	10,290	7,150
108	5,450	17,750	12,700	8,130	5,650
120	4,800	15,260	10,290	6,590	*
144	3,760	10,830	7,150	*	*
168	2,970	7,950	5,250	*	*
*KL/r > 200 See notes below for more information

Beam Loading - P5501
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	*5,220	0.01	*5,220	*5,220	*5,220	1.00
36	*5,220	0.04	*5,220	*5,220	*5,220	1.00
48	4,820	0.08	4,820	4,820	4,820	0.98
60	3,860	0.13	3,860	3,860	3,860	0.93
72	3,220	0.19	3,220	3,220	3,220	0.87
84	2,760	0.26	2,760	2,760	2,500	0.81
96	2,410	0.34	2,410	2,410	1,920	0.76
108	2,140	0.42	2,140	2,140	1,510	0.70
120	1,930	0.52	1,930	1,840	1,230	0.64
144	1,610	0.76	1,610	1,280	850	0.53
168	1,380	1.03	1,250	940	630	0.45
192	1,210	1.35	960	720	480	0.39
216	1,070	1.70	760	570	380	0.34
240	960	2.09	610	460	310	0.30
*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
P5501T

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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