for heavy duty applications HD Support Frame IDEAL FOR SUPPORTING LARGER AHU’sOur medium/heavy duty frame provides extra support for larger ductwork or twin support of dual ducts,multiple cable tray or large pipe supports. Download HD Support Frame Technical Sheet technical Features Cost Effective Lightweight UV & Expansion Resistant Width/Length To Suit Ideal For Larger AHU's image Gallery Low Level Support Frame Duct Support H Frames LD Support Frames MD Support Frames HD Support frame SD Support frame Cube Support Systems