The Miro 4-RAH-7 4-in. Dynamic Support's recommended spacing is not to exceed 10 feet centers depending upon the load. Make certain each pipestand is properly elevated to even load weight at all pipestands. 

Measurements:

• 4-in. ID maximum pipe capacity, 4.5-in. OD maximum
• Adjustable in height from 4.5 in. to 8.5, even load required, maximum load is 223 lbs. (Max load based on 2.0 psi to the roof deck)
• 7 per case, 27 lbs. per case, (DW= 29 lbs.)

Materials:

• Base Material: Polycarbonate
• Axle, Roller and Collar material: Polycarbonate
• All metal parts are stainless steel or hot-dip galvanized