P5500KO - 1-5/8" x 2 7/16", 12 Gage; Knock Outs

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Part No. Length (ft) Finish Product Weight / Ft (lbs/ft)
P5500KO 20 PG 2.47
P5500KO 10 PG 2.47
P5500KO 10 HG 2.618
P5500KO 20 HG 2.618
P5500KO 10 GR 2.47
P5500KO 20 GR 2.47
P5500KO 10 PL 2.47
P5500KO 20 PL 2.47

    Beam Loading

    Beam Loading - P5500KO
    Span
    (in)    		 Max Allow. Unifor 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 3,107 0.04 3,107 3,107  3,107  0.99
    36 2,071 0.09 2,071 2,071  2,071  0.89
    48 1,558 0.15 1,558 1,558  1,349  0.77
    60 1,245 0.24 1,245 1,245  865  0.67
    72 1,036 0.34 1,036 903  599  0.58
    84 893 0.47 884 665  447  0.51
    96 779 0.61 675 504  342  0.46
    108 694 0.78 532 399  266  0.42
    120 618 0.95 437 323  219  0.40
    144 523 1.39 304 228  152  0.36
    168 447 1.89 219 162  114  0.32
    192 390 2.46 171 124  86  0.30
    216 342 3.07 133 105  67  0.28
    240 314 3.86 105 86  57  0.26
    Refer to the General Specifications for loading information.

    Column Loading

    Column Loading - P5500KO
    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 4,640 13,840 12,570 10,840 9,190
    36 3,970 11,050 9,190 7,030 5,370
    48 3,180 8,420 6,390 4,620 3,630
    60 2,550 6,250 4,620 3,450 2,780
    72 2,120 4,790 3,630 2,780 2,260
    84 1,810 3,890 3,010 2,330 1,910
    96 1,580 3,290 2,580 2,020 1,650
    108 1,400 2,860 2,260 1,770 1,440
    120 1,270 2,530 2,020 1,580 KL/r>200
    144 1,060 2,070 1,650 KL/r>200 KL/r>200
    168 920 1,750 1,380 KL/r>200 KL/r>200
    Refer to the General Specifications for loading information.

    Elements of Section

    Elements of Section - P5500KO
    Area of Section 0.726 in2 (4.7 cm2)
    Axis 1-1 Axix 2-2
    Moment of Inertia (I) 0.522 in4 (21.7 cm4) 0.334 in4 (13.9 cm4)
    Section Modulus (S) 0.390 in3 (6.4 cm3) 0.411 in3 (6.7 cm3)
    Radius of Gyration (r) 0.848 in (2.2 cm) 0.679 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.