P1001B - 1-5/8" x 3-1/4", 12 Gage, Double Combination

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Unistrut's P1001B (double combination), often known as 12 gauge standard or deep back-to-back strut channel, is commonly used for electrical supports, mechanical supports, pipe, conduit, duct and cable tray supports, and other general framing. For application examples, refer to our Application Showcase

This channel is ideal for supporting larger loads than P1000 while not sacrificing height as with the P1001, it offers versatility with two connection points, and avoids welding on the jobsite.

Product dimensions are 3 1/4" Long x 1 5/8" Wide x 12 ga. thick; Side to Side. 

Our P1001B is available in 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)
P1001B 10 PG 3.78
P1001B 20 PG 3.78
P1001B 10 HG 4.028
P1001B 20 HG 4.028
P1001B 20 GR 3.78
P1001B 10 GR 3.78
P1001B 10 PL 3.78
P1001B 20 PL 3.78

    Elements of Section

    Elements of Section - P1001B
    Area of Section 1.111 in2 (7.2 cm2)
    Axis 1-1 Axix 2-2
    Moment of Inertia (I) 1.204 in4 (50.1 cm4) 0.381 in4 (15.9 cm4)
    Section Modulus (S) 0.741 in3 (12.1 cm3) 0.469 in3 (7.7 cm3)
    Radius of Gyration (r) 1.041 in (2.6 cm) 0.586 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.