P2784 - Purlin Beam Clamp

Part No. Use With Nom. Pipe Size Finish Product Weight / Piece (lbs)
P2784-1 P1000, P1100, P2000 1-5/8" Channel EG 1.75
P2784-2 P1001, P1101, P2001 3-1/4" Channel EG 1.79
P2784-3 P5001, P5501 EG 1.8

    Design Loads

    Design Loads - P2784
    Part Number For Use With  Design Load
    lbs (kN)
    P2784-1 P1000, P1100, P2000 1,200 (5.34)
    P2784-2 P1001, P1101, P2001 1,200 (5.34)
    P2784-3 P5001, P5501 1,200 (5.34)


    1. Design loads only apply to Unistrut brand products. Look for "UNISTRUT" on the part.
    2. Use in pairs only.
    3. Safety factor = 2.5 based on ultimate strength of connection.

    General Specifications

    Standard Dimensions (Unless Shown Otherwise on Drawing):

    • Hole Diameter:  9/16"  (14mm)
    • Hole Spacing (From End):  13/16"  (21mm)
    • Hole Spacing (On-Center):  1 7/8"  (48mm)
    • Width:  1 5/8"  (41mm)
    • Thickness:
    • 1/4"  (6.4mm) with steel meeting or exceeding ASTM A1011 SS GR 33, or
    • 0.220" (5.6mm) with steel meeting or exceeding ASTM A1011 HSLAS GR 45


    • When used for mechanical supports, load capacities of brackets and fittings should be in compliance with the American Standard Code for Pressure Piping.

    Materials & Finishes

    Materials & Finishes - Standard:

    • Base Metal: Steel conforms to ASTM A1011 SS GR 33, A1011 HSLAS GR 45, A36, A575, A576, or A635.
    • Electrogalvanized (EG):  Conforms to ASTM B633, Type III SC1
    • Unistrut Defender (DF):  Conforms to ASTM A1059
    • Hot Dip Galvanized (HG):  Conforms to ASTM A123 or A153
    • Perma-Green (GR):  Conforms to commercial standards for powder coating
    • Perma-Gold (ZD):  Conforms to ASTM B633, Type II SC1 or SC3
    • Plain (PL):  No finish 

    Materials & Finishes - Special Metals:

    • Stainless Steel, Type 304 (SS):  Conforms to ASTM A240 or A276, Type 304 *
    • Stainless Steel, Type 316 (ST):  Conforms to ASTM A240 or A276, Type 316 *
    • Aluminum (AL):  Conforms to ASTM B209, Type 1100F or 5052-H32 *

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