P3301WT - 1-5/8" x 1 3/4", 12 Gage, Back-to-Back, Slotted

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Unistrut's P3301WT (back-to-back slotted) has slots on the back side for use with 5/8" threaded rod and fasteners. The wider slots are an advantage during installation, eliminating the need for field drilling traditional slotted channel while retaining the adjustability of traditional slotted channel.

This slotted option is popular because it’s adjustable and accommodates large diameter threaded rod, yet has modest load capacity loss versus the solid version. It has 85% of the capacity of the solid version of the profile.

This channel is commonly used for trapeze supports, anchoring to concrete, ceiling grids, pipe, conduit, duct and cable tray supports, racks, and other general framing. For application examples, refer to our Application Showcase

Product dimensions are 1 5/8" wide x 1 3/4" tall x 12 ga. thick; back-to-back with slots. The slots are 2" wide x 11/16" long, 3" on center and sized for use with 5/8" threaded rod or fasteners.

Our P3301WT is available in the following finishes:  Pre-Galvanized (PG), Hot-Dip Galvanized (HG), Plain (PL), Green (GR), Zinc Dichromate (ZD) and Stainless Steel (SS).

Part No. Length (ft) Finish Product Weight / Ft (lbs/ft)
P3301WT 10 PG 2.7
P3301WT 20 PG 2.7
P3301WT 20 HG 2.76
P3301WT 10 HG 2.76

    Beam Loading

    Beam Loading - P3301WT
    Span
    (in)
    Max Allow. Uniform Load
    (lbs)
    Deflection at Uniform Load
    (in)
    Uniform Loading at Deflection Lateral Bracing Reduction Factor
    Span/180
    (lbs)
    Span/240
    (lbs)
    Span/360
    (lbs)
    24 1,437 0.06 1,437 1,437 1,437 1.00
    36 961 0.13 961 961 731 1.00
    48 714 0.23 714 612 408 1.00
    60 578 0.37 527 391 264 1.00
    72 476 0.52 366 272 179 0.97
    84 408 0.71 264 204 136 0.95
    96 357 0.93 204 153 102 0.92
    108 323 1.20 162 119 85 0.90
    120 289 1.47 128 102 68 0.87
    144 238 2.09 94 68 43 0.82
    Refer to the General Specifications for loading information.

    Column Loading

    Column Loading - P3301WT
    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 KL/r>200
    96 2,410 6,420 4,240 KL/r>200 KL/r>200
    108 2,080 5,070 3,350 KL/r>200 KL/r>200
    Refer to the General Specifications for loading information.

    Elements of Section

    Elements of Section - P3301WT
    Area of Section 0.790 in2 (5.1 cm2)
    Axis 1-1 Axix 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)

    General Specifications

    Standard Lengths:

    • 10 feet:  10' or 10’ 1/8” (3.05m) ± 1/8" (3 mm)
    • 20 feet:  20' or 20’ 3/8” (6.11m) ± 1/8" (3 mm)

    Special Lengths:

    Curved Channel:

    • Many Unistrut channel sections can be supplied with a curve. Click here for our ordering form, specifications, and instructions.

    Load Data:

     

    • All beam and column load data pertains to carbon steel and stainless steel channels.
    • Load tables apply only to UNISTRUT brand channel. Look for "UNISTRUT" on the product.
    • Load tables and charts are constructed to be in accordance with the SPECIFICATION FOR THE DESIGN OF COLD-FORMED STEEL STRUCTURAL MEMBERS 2007 EDITION published by the AMERICAN IRON AND STEEL INSTITUTE USING ASD METHOD.
    • Loads are based on 33 ksi steel cold formed to 42 ksi.
    • Safety Factor to Yield Strength is 1.67 for Beam Loads and 1.80 for Column Loads.
    • Beam loads are based on a simple beam and are given as a total uniform load (W) in pounds. For proper calculation procedures, refer to our Beam Load Calculation Guide.
    • For bearing loads, reference our bearing loads page.

    Welds:

    • Welded channels are spot welded 2" (51 mm) or 3" (76 mm) on-center. 

     

     

    Materials & Finishes

    Materials & Finishes - Standard:

    • Pregalvanized (PG):  Conforms to ASTM A653 SS GR 33, G90.
    • Unistrut Defender (DF):  Conforms to ASTM A1046 SS GR 33
    • Hot Dip Galvanized (HG):  Steel conforms to ASTM A1011 SS GR 33, Finish conforms to ASTM A123
    • Perma-Green (GR):  Steel conforms to ASTM A1011 SS GR 33, E-Coat finish
    • Perma-Gold (ZD):  Steel conforms to ASTM A1011 SS GR 33, Finish conforms to ASTM B633, Type II SC3
    • Plain (PL):  Conforms to ASTM A1011 SS GR 33
    Materials & Finishes - Special Metals:
    • Stainless Steel, Type 304 (SS):  ASTM A240, Type 304 *
    • Stainless Steel, Type 316 (ST):  ASTM A240, Type 316 *
    • Aluminum (EA):  ASTM B221, Type 6063-T6 (Extruded) *

    * These materials have different physical properties and performance characteristics. Please contact us for design support.

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