MIRO 3-R-2 Aluminum Roller Pipe Support - Supports Pipes with 3" Inside Diameter & 3" - 3.75" Outside Diameter, 2.15" Clearance

The MIRO 3-R-2 is a roller-bearing rooftop pipe support designed for gas lines, conduit, and other mechanical piping where thermal expansion must be accommodated. Pipes ride on a low-friction polycarbonate roller and axle seated in a molded base, helping prevent membrane damage while maintaining alignment. The compact, non-penetrating footprint makes it a dependable choice for flat and low-slope roofs.

Key Features:

• accommodates up to 3 in. nominal pipe; supports 3.0–3.75 in. outside diameter
• 2.15 in. fixed pipe clearance with low-friction roller for thermal movement
• non-penetrating polycarbonate base distributes load and protects roof membrane
• compact 7.75 in. × 7.75 in. footprint for tight layouts and easy placement
• backed by a 20-year limited warranty

• Model / SKU: 3-R-2
• Pipe capacity: up to 3 in. nominal; maximum outside diameter 3.75 in. (including insulation where applicable)
• Pipe clearance: 2.15 in. fixed
• Base dimensions: 7.75 in. × 7.75 in.
• Footprint area: approximately 60 sq. in.
• Materials: polycarbonate base, polycarbonate roller and axle, stainless hardware where applicable
• Load rating: up to 79 lb per support (based on evenly distributed static load)
• Recommended spacing: up to 7 ft on center depending on load and layout
• Design: non-penetrating, allows axial thermal expansion and contraction
• Accessories (optional): 3-R Spacer (+2 in. elevation per spacer), 3-R-2 Pipe Guide Strap

• plan the pipe route and lay out supports; confirm spacing based on pipe size and load.
• clean and inspect the roof surface; ensure each placement area is flat and debris-free.
• set the 3-R-2 base directly on the membrane with the roller oriented in the direction of pipe travel.
• place the pipe onto the roller cradle; verify the 2.15 in. clearance meets project requirements.
• add guides/straps only if required, ensuring the pipe can freely expand and contract.
• level and align multiple supports so load is shared; tighten any accessories per manufacturer guidance.
• perform a final check for stability, spacing, and unobstructed thermal movement.

Q: what pipe sizes does the 3-R-2 support?
A: it is optimized for 3 in. nominal pipe and accepts up to 3.75 in. outside diameter.

Q: what is the fixed clearance above the roof?
A: the 3-R-2 provides approximately 2.15 in. of pipe clearance.

Q: does installation require roof penetrations or adhesives?
A: no, the molded base is non-penetrating and sits directly on the membrane.

Q: what is the load capacity per support?
A: up to 79 lb when properly spaced and installed on a clean, flat surface.

Q: can I increase the elevation?
A: yes. use the 3-R Spacer accessory to add approximately 2 in. of height per spacer.