Framing Clamp System requires no welding or specialized tools and consists of end clamps, T-brackets, and perforated channels which are available in lengths up to 10 ft. In typical framing application, 4 end clamps are attached to 2 parallel bar joists or beams, and each end clamp occupies 1-1/4 x 3 in. space between joists. System is designed for installing HVAC equipment, exhaust fans, vents, and skylights, framing roof openings, and supporting loads above or below roof decks.