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Unistrut P3300 – 1-5/8 x 7/8″ 12 Gauge Metal Framing Channel Strut

UNISTRUT P3300 Framing

The Unistrut P3300 has dimensions of 1-5/8″ x 7/8″ with a wall of 12 ga (.105″). It is shorter than both the P1000 and P3000.

Also Available in Slotted Configurations 

Available In Unistrut Defender Finish

Part No. Finish Length (ft) Weight Per Foot
P3300-10-GR Perma-Green® III 10' 1.340 lbs.
P3300-20-GR Perma-Green® III 20' 1.340 lbs.
P3300-10-PG Pre-Galvanized Zinc 10' 1.340 lbs.
P3300-20-PG Pre-Galvanized Zinc 20' 1.340 lbs.
P3300-10-HG Hot-Dipped Galvanized 10' 1.431 lbs.
P3300-20-HG Hot-Dipped Galvanized 20' 1.431 lbs.
P3300-10-ZD Perma-Gold™ 10' 1.340 lbs.
P3300-20-ZD Perma-Gold™ 20' 1.340 lbs.
P3300-10-PL Plain 10' 1.340 lbs.
P3300-20-PL Plain 20' 1.340 lbs.
P3300-10-DF Defender 10' 1.43 Lbs.
P3300-20-DF Defender 20' 1.43 Lbs.
P3300-10-SS Stainless Steel (304) 10' 1.390 Lbs.
P3300-20-SS Stainless Steel (304) 20' 1.390 Lbs.
P3300-10-ST Stainless Steel (316) 10' 1.390 Lbs.
P3300-20-ST Stainless Steel (316) 20' 1.390 Lbs.


View the Unistrut Finish Specifications PDF for detailed specifications on all finishes.

  • GR = Perma-Green® III / Powder Coat Green
  • PG = Pre-Galvanized Zinc
  • HG = Hot-Dipped Galvanized
  • ZD = Perma-Gold™ / Zinc Dichromate
  • PL = Plain
  • DF = Corrosion Resistant Defender Finish
  • SS = Stainless Steel (304)
  • ST = Stainless Steel (316)

Available Piercings and Combinations

P3300HS

P3300SL

P3300T

 

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.

Elements of Section - P3300

Area of Section 0.395 in2 (2.5 cm2)
Axis 1-1 Axis 2-2
Moment of Inertia (I) 0.037 in4 (1.5 cm4) 0.143 in4 (6.0 cm4)
Section Modulus (S) 0.072 in3 (1.2 cm3) 0.176 in3 (2.9 cm3)
Radius of Gyration (r) 0.306 in (0.8 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

Column Loading - P3300

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 2,360 7,740 7,260 6,350 5,390
36 2,120 6,470 5,390 3,990 2,810
48 1,760 4,910 3,550 2,270 1,580
60 1,380 3,440 2,270 1,460 *
72 1,080 2,390 1,580 * *

*KL/r > 200
See notes below for more information

Beam Loading - P3300

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)

24 600 0.10 600 600 400 1.00
36 400 0.22 360 270 180 1.00
48 300 0.40 200 150 100 1.00
60 240 0.62 130 100 60 0.98
72 200 0.89 90 70 40 0.97
84 170 1.20 70 50 30 0.96
96 150 1.59 50 40 30 0.94
108 130 1.96 40 30 20 0.93
120 120 2.48 30 20 20 0.92


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.

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UNISTRUT Service Company • 24400 Sperry Drive, Cleveland, OH 44145 • 1-800-694-9274 • Fax: 440-385-0126 •