Strut Services Group, Inc.

Unistrut Alabama



P1101B – 1-5/8″ x 3-1/4″, 14 Gage, Double Combination

Unistrut’s P1101B (double combination), often known as 14 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.

This channel is ideal for providing similar loading capacity of a traditional back-to-back channel but provides multiple plane connection points on a horizontal plane. A 14 gauge product is appealing to users who feel the 12 gauge alternatives provide an excess loading capacities than what is required from the design.

Product dimensions are 1 5/8″ long x 3 1/4″ wide x 14 ga. thick.

Our P1101B is available in the following finishes: Pre-Galvanized (PG), Hot-Dip Galvanized (HG), Plain (PL), Green (GR), Zinc Dichromate (ZD) and Stainless Steel (SS & ST).


Part No. Length (ft) Finish Product Weight / Ft (lbs/ft)
P1101B 10 PG 2.84
P1101B 20 PG 2.84
P1101B 10 HG 2.968
P1101B 20 HG 2.968
P1101B 10 GR 2.84
P1101B 20 GR 2.84
P1101B 20 PL 2.84
P1101B 10 PL 2.84
Elements of Section – P1101B
Area of Section 0.835 in2 (5.4 cm2)
Axis 1-1 Axix 2-2
Moment of Inertia (I) 0.904 in4 (37.6 cm4) 0.295 in4 (12.3 cm4)
Section Modulus (S) 0.556 in3 (9.1 cm3) 0.364 in3 (6 cm3)
Radius of Gyration (r) 1.041 in (2.6 cm) 0.595 in (1.5 cm)
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:
  • Available with a tolerance of ±1/8″ (3 mm). Request quote.
Curved Channel:
  • Many Unistrut channel sections can be supplied with a curve. Contact us 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.
  • Welded channels are spot welded 2″ (51 mm) or 3″ (76 mm) on-center.

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.

Scroll to Top