IronRidge Flat Roof Attachment, Mill – FRA-BASE-01-M1
SKUFRA-BASE-01-M1
The IronRidge FRA-BASE-01-M1 Flat Roof Attachment is a cast-aluminum base for mechanically attaching IronRidge arrays on flat or low-slope roofs. It provides the deck interface that accepts rail-mounting hardware for L-feet or Fixed Tilt Legs.
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Product Overview
The IronRidge FRA-BASE-01-M1 Flat Roof Attachment is a cast-aluminum base for mechanically attaching IronRidge arrays on flat or low-slope roofs. It provides the deck interface that accepts rail-mounting hardware for L-feet or Fixed Tilt Legs.
Optional formed membrane covers (TPO, PVC, KEE matched to major roofing brands) are sold as separate SKUs. This listing is the mill base only — do not assume a membrane is included.
Best For
- Flat or low-slope roofs (IronRidge’s Tech Brief describes low-slope roofs as 0–6°) that need a fastened IronRidge attachment rather than ballast-only.
- IronRidge XR Tilt Mount or Flush Mount designs that specify FRA bases with L-feet or Fixed Tilt Legs.
Key Features & Specifications
| Specification | Details |
|---|---|
| Product type | Flat Roof Attachment base |
| Part number | FRA-BASE-01-M1 |
| Finish | Mill |
| Fastening pattern (Tech Brief) | 16-point pattern (12 straight and 4 angled fastening options) |
| Roof screws | Type, size, and quantity specified by Structural Engineer; fastener size not to exceed #15; install symmetrically (FRA-01-MAN REV 1.1) |
| Hardware torque (to rail bracket) | 250 in-lbs (21 ft-lbs) with 3/8 in hardware |
| Membranes | Sold separately (FRA-M60… SKUs for TPO/PVC/KEE brands) — not included with FRA-BASE-01-M1 |
| Structural certification | Designed and certified for compliance with the International Building Code & ASCE/SEI-7 |
| UL 2703 | Conforms to UL 2703 (2015) Mechanical and Bonding requirements — see IronRidge Tilt or Flush Mount manuals for full ratings |
| Source | IronRidge Flat Roof Attachment Installation Manual FRA-01-MAN REV 1.1; Flat Roof Attachment Tech Brief Version 1.10 (© 2026); Parts Catalog v3.66 |
What You May Also Need
Usually required
- Roof screws and sealing materials per the structural engineer and roofing manufacturer.
- L-Foot or Fixed Tilt Leg hardware for the rail plane; XR Rails per design.
May be required
- IronRidge Fixed Tilt Leg Kit (10", 15", 20" or 30" north leg) when the array is tilted.
- Matching FRA membrane SKU for the roof membrane brand (order separately).
Optional upgrades
- Roof Mounts for Solar Panels: Other IronRidge roof attachments for the array.
Check current IronRidge documentation and the stamped design for the site before combining racking components.
Important Considerations
- Span and load capacity depend on rail size, tilt angle, snow and wind loads. Use IronRidge Design Assistant or PE-stamped certification letters for your site.
- If using a membrane flashing, remove the silicone washer liner before welding or adhering; ensure membrane compatibility with the existing roof.
- Professional installation required. Follow IronRidge instructions, the roofing manufacturer, and the applicable building code.