Unistrut – P1000SL – 1-5/8″ x 1-5/8″, 12 Gauge; Long Slots


The Unistrut P1000SL is a durable and versatile framing system designed to meet a wide range of construction needs. Made from high-quality 12-gauge steel, this 1-5/8″ x 1-5/8″ channel offers exceptional strength and stability. The P1000SL is equipped with long slots along its length, providing flexibility in attaching and securing accessories. Whether you need to mount electrical conduits, support plumbing pipes, or create custom structures, the Unistrut P1000SL provides a reliable and adjustable solution. With its corrosion-resistant finish and easy installation process, this product is suitable for both commercial and residential projects. Trust the Unistrut P1000SL to deliver exceptional performance and adaptability in any construction or industrial setting.



12 gauge slotted strut channel P1000SL has slots on the back side for use with 3/8″ threaded rod and fasteners. These slots can eliminate the need for field drilling and allow adjustability when installing. This channel is commonly used for trapeze supports, seismic bracing, 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 5/8″ tall x 12 ga. thick; with slots.
  • Slotted for adjustability
  • The slots are 13/32″ wide x 3″ long, 4″ on center and sized for use with 3/8″ Threaded Rod or Fasteners
  • Slotted for 3/8″ rod and fasteners
  • Our P1000SL is available in the following finishes: Pre-Galvanized (PG), Hot-Dip Galvanized (HG), Plain (PL), Green (GR), Zinc Dichromate (ZD) and Stainless Steel (SS).
  • Made in the USA

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).

Curved Channel:

  • Many Unistrut channel sections can be supplied with a curve.

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 under Resources.

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.

1-877 385 5130

480 Collier-MacMillan Drive · Cambridge · ON N1R 6R5 · CanadaDrainage: 877 385 5130 | Unistrut: 877 243 6889