Dimension Information for R20 & R21

The following are the torque values used for the determining the load ratings of Phoenix Support Systems Products when attached to channel framing as specified by Metal Framing Manufacturer’s Association (MFMA) Standard #2:

For beam clamps or other applications the following torque values from Manufacturer’s Standardization Society (MSS) SP-69 are recommended unless otherwise specified.

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.