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FS-521 Series

Product Description

Description:
1-5/8" x 1-5/8" Back to Back Channel x 12 Gauge
Width:
1-5/8"
Height:
1-5/8"
Gauge:
12
Thickness:
.098
Weight Per FT:
2.64


Additional Product Information & Downloads

FS-521 Series

Section Properties

SECTION PROPERTIES
WT/FT
LBS.
AREA
SQ. IN.
2.64 .750
X-X AXIS
Ix
in4
Sx
in3
Rx
in
.145 .180 .435
Y-Y Axis
Iy
in4
Sy
in3
Ry
in
.280 .345 .600
I = Moment of Inertia  S = Section Modulus  R = Radius of Gyration

Available Finishes

Pre-Galvanized (PG) – G90 per ASTM A653 (0.90 oz/sq ft; 0.77 mil thickness) Meets physical requirements of Grade 33
Plain (PL) – ASTM A1011 (Meets physical requirements of Grade 33)
Green (GR)
Hot Dip Galvanized (HD) – ASTM A123 Grade 85 (3.3 mil thickness) Meets physical requirements of Grade 33
Gold (GD) – ASTM B633 Type II SC2 with yellow chromate (0.30 mil thickness)
Aluminum (AL) – 6005-T5 (Exceeds 6063-T6 strength)
Stainless Steel (Type 316 [ST6] or 304 [ST4]) – ASTM A240
Custom colors available upon request

Available Fabrications

Short Slots (SS) 1-1/8" x 9/16" Slots 2" on Center
Long Slots (SL) 3" x 1-1/8" Slots 4" on Center
Universal Slots (US) 1-1/8" x 13/32" and 1-1/8" x 9/16" Slots 2" on Center
Holes (H) 9/16" Holes 1-7/8" on Center
Knockouts (KO) 7/8" Diameter Knockouts 6" on Center
Custom channel fabrications available upon request

Allowable Beam Loads — Span In Inches

24"30"36"42"48"60"72"84"96"108"120"
Stress1,245*1,190990850745595495425370330295
1/240*********79060538527019515012095
  1. TOTAL STATIC LOAD in LBS.
  2. Upper line is MAXIMUM ALLOWABLE UNIFORM LOAD creating 25,000 PSI Bending Stress about the X-Axis based on SIMPLE BEAM condition.
  3. Lower line shows TOTAL UNIFORM LOAD which produces a defl ection of 1/240th of the SPAN, (i.e.; 1/2" Def. for 120" Span)
  4. Multiply values in upper line by 0.5 to obtain ALLOWABLE CENTER CONCENTRATED LOAD at 25,000 PSI Stress. Defl ection by 0.8.
  5. Load limited by spot weld shear.
  6. For punched channel, reduce weld limited loads by 0.75 due to 4" weld spacing.
  7. *** Load controlled by 25,000 PSI design stress.

Allowable Column Loads — Unsupported Height of Column in Inches

24"30"36"42"48"60"72"84"96"108"120"
15,30014,36513,30012,14510,9308,4956,2304,5753,5052,765***
  1. COLUMN LOADS are allowable axial loads applied at the section centroid. Loads applied at the slot face must be reduced for Eccentricity.
  2. ALLOWABLE COLUMN LOADS shown are based upon an effective length factor K = 0.8 standard engineering practice required for evaluation of other conditions.