Page 86 - Phoenix-Catalog-05-2020
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LOAD
X
Uniform load
1 X UNIFORM LOAD 2
X 2
General Information
Technical Data
     The following are the torque values used for the determining the load ratings of Phoenix Products when attached to channel framing as specified by Metal Framing Manufacturer’s Association (MFMA) Standard #2:
1⁄4 6.4 72 6 8.1
For beam clamps or other applications the following torque values from Manufacturer’s Standardization Society
(MSS) SP-69 are recommended unless otherwise specified.
 Thread Size
 Torque
 Inch
  mm
  in. lb.
  ft. lb.
  Nm
   Thread Size
 Torque
 Inch
  mm
  in. lb.
  ft. lb.
  Nm
  1⁄4 6.4 40
3.3 4.5
5.0 6.8 10.4 14.1
15.0 20.3 33.3 45.2 82.5 111.9
 5⁄16
  7.9
  50
  4.2
  5.6
   5⁄16
  7.9
  132
  11
  14.9
   7⁄16
  11.1
  90
  7.5
  10.2
 3⁄8
9.6 228
19 25.8
3⁄8 1⁄2
9.6 60 12.7 125
 1⁄2
  11.1
  600
  50
  67.8
  9⁄16 14.3 180 3⁄4 19.0 400 1 25.4 990
 5⁄8
  15.8
  250
  20.8
  28.2
  7⁄8
  22.2
  665
  55.4
  75.1
  Note: Caution should be taken not to over tighten the set screw on iron beam clamps as this will cause distortion, a lower maximum load capability and possible breakage.
Uniform load and Point load
When a distributed load has a constant value over the entire bracket or beam length, it is said to be uniformly loaded. This would be similar to loading identical boxes on a shelf side by side. A point load is when the force of the load is concentrated on one point along the bracket or beam. Using identical supports as shown below and the point load located 1⁄2 way between the supports, the point load rating will be 1⁄2 the uniform load rating. Load ratings are generally listed in pounds (lb.) or kilo Newtons (kN).
        Cantilever load
A cantilever bracket or beam is rigidly attached at one end and is completely free at the other end. A cantilever load is applied at one point or spread along a section of the length of a bracket or beam and causes a twisting load or moment at the mounting point. Load ratings for this type of bracket are generally listed in inch pounds (in. lb.) or Newton meter (Nm). A uniformly applied load on a bracket (figure “A") may be considered as a point load by taking the uniform load and expressing it as a single point load of the same force at a distance of 1⁄2 the total distance the load is spread over as shown in figure “B". This is calculated by multiplying 1⁄2 the distance “X", in inches or meters, by the load expressed in pounds or Newtons.
LOAD
X
LOAD
X2
Point load
             Page [86]
800-721-0404 ENGINEERING CATALOG
Cantilever load (Figure “A")
Cantilever load (Figure “B")
 



















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