Samson 1390 - Channel Mounting Bracket Part No. 1390 Channel mounting bracket. Channels may be mounted from I beams with use of channel mounting brackets (up to 9" flange). Use two brackets for the two and three reel channel and three brackets for the five reel channel. Attaches to I-beam. Use two with 2 reel and 3 reel mounting channels. Use three with 5 reel mounting channel. Specifications Channel mounting bracket. Channels may be mounted from I beams with use of channel mounting brackets (up to 9" flange). Use two brackets for the two and three reel channel and three brackets for the five reel channel. Attaches to I-beam. Use two with 2 reel and 3 reel mounting channels. Use three with 5 reel mounting channel. Shipping Weight: 7 lbs Dimensions: 16 X 5 X 12 inches