P1000KO - 1-5/8" x 1-5/8", 12 Gage; Knock Outs

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Unistrut's P1000KO (knock-out) is design for use in electrical raceway and support applications, and is UL listed and CSA listed for use as a strut-type channel raceway. The knock-outs are supplied attached to the strut and can be punched out in the field, as needed, for entry and exit of the wiring from the channel raceway.

This product is commonly used for lighting and other electrical applications. The channel can be used as both the raceway and support for the lighting, minimizing the material needs on the project and providing a clean, aesthetically pleasing installation.

Product dimensions are 1 5/8" wide x 1 5/8" tall x 12 ga. thick; with knock-outs.  The knock-outs are 7/8" in diameter and 6" on center.

Our P1000KO is available in the following finishes: Pre-Galvanized (PG), Hot-Dip Galvanized (HG), Plain (PL) and Green (GR).

Part No. Length (ft) Finish Product Weight / Ft (lbs/ft)
P1000KO 10 PG 1.9
P1000KO 20 PG 1.9
P1000KO 20 HG 2.014
P1000KO 10 HG 2.014
P1000KO 10 GR 1.9
P1000KO 20 GR 1.9
P1000KO 10 PL 1.9
P1000KO 20 PL 1.9

    Beam Loading

    Beam Loading - P1000KO
    Span
    (in)
    Max Allowable 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 1,606 0.06 1,606 1,606 1,606 1.00
    36 1,074 0.13 1,074 1,074 855 0.94
    48 808 0.22 808 722 475 0.88
    60 646 0.35 618 456 304 0.82
    72 532 0.50 428 323 209 0.78
    84 456 0.68 314 238 152 0.75
    96 399 0.89 238 181 124 0.71
    108 361 1.14 190 143 95 0.69
    120 323 1.40 152 114 76 0.66
    144 266 2.00 105 76 57 0.61
    168 228 2.72 76 57 38 0.55
    192 200 3.55 57 48 NR 0.51
    216 181 4.58 48 38 NR 0.47
    240 162 5.62 38 NR NR 0.44
    Note NR - Not Recommended
    Refer to the General Specifications for loading information.

    Column Loading

    Column Loading - P1000KO
    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 3,550 10,740 9,890 8,770 7,740
    36 3,190 8,910 7,740 6,390 5,310
    48 2,770 7,260 6,010 4,690 3,800
    60 2,380 5,910 4,690 3,630 2,960
    72 2,080 4,840 3,800 2,960 2,400
    84 1,860 4,040 3,200 2,480 1,980
    96 1,670 3,480 2,750 2,110 1,660
    108 1,510 3,050 2,400 1,810 KL/r>200
    120 1,380 2,700 2,110 KL/r>200 KL/r>200
    144 1,150 2,180 1,660 KL/r>200 KL/r>200
    Refer to the General Specifications for loading information.

    Elements of Section

    Elements of Section - P1000KO
    Area of Section 0.555 in2 (3.6 cm2)
    Axis 1-1 Axix 2-2
    Moment of Inertia (I) 0.185 in4 (7.7 cm4) 0.236 in4 (9.8 cm4)
    Section Modulus (S) 0.202 in3 (3.3 cm3) 0.290 in3 (4.8 cm3)
    Radius of Gyration (r) 0.577 in (1.5 cm) 0.651 in (1.7 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.

    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.