The SMACNA Testing and Research Institute verified the Strut Gripper from Griplock Systems is an acceptable alternative to the duct hanger systems prescribed in the SMACNA HVAC Duct Construction Standards (HVAC-DCS), 4th edition, Chapter 5, Tables 5-1, 5-1M and 5-2. The strut gripper comes in two sizes to be used with galvanized cable with diameters from 3/32” – 1/8”, providing working load limits ranging from 100 pounds up to 200 pounds per suspension point. (note: one piece of strut requires a gripper on each side – doubling the WLL shown below for that section). The strut gripper hanging system is easier and faster to install than traditional HVAC hangers and straps, saving time and labor costs. This strut gripper is designed to be used with downward facing strut for secure support and allows the installer to make tool-free height adjustments and level ductwork quickly. The galvanized cable can be purchased in bulk spools or cut to length and supplied with a variety of end fittings to secure to structure.
- For attaching to downward facing strut
- Bottom cable exit
- Ability to connect multiple grippers to multiple ducts with a single cable
Note: Working Load Limits are for each suspension point. A minimum of 2 points are needed (one for each side of the duct)




ZF-25-1213-KFB-S rA
ZF-30-STRUT-KFB