IronRidge BX Ballasted Chassis, 10° Tilt, Flat Roof – BX-10D-P1
SKUBX-10D-P1
The IronRidge BX Chassis (BX-10D-P1) is a ballasted mount for flat roofs. It holds a solar module at a fixed 10° tilt, and concrete blocks placed inside it hold the array down instead of roof bolts.
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Product Overview
The IronRidge BX Chassis (BX-10D-P1) is a ballasted mount for flat roofs. It holds a solar module at a fixed 10° tilt, and concrete blocks placed inside it hold the array down instead of roof bolts.
IronRidge molds the chassis from BASF Ultramid, a glass-reinforced polyamide (nylon). IronRidge says a flange around the edge stiffens it, and a wide base spreads weight to reduce point pressure on the roof.
Openings in the base keep water from pooling, per IronRidge. Modules attach with a BX bottom clamp and a BX top clamp at each corner. IronRidge designed BX for commercial flat-roof projects.
Best For
- Flat commercial roofs: IronRidge says BX is designed for the needs of commercial solar on flat roofs, including complex roof layouts.
- Arrays that avoid roof penetrations: A fully ballasted BX array is held by concrete blocks. IronRidge also allows anchored or hybrid layouts using its Flat Roof Attachment Kit.
- A 10° module tilt: IronRidge makes the chassis in 5° and 10° versions. This listing is the 10° version.
Key Features & Specifications
| Specification | Details |
|---|---|
| Product type | Ballasted flat-roof mount (chassis), 10° tilt, IronRidge BX System |
| Part number | BX-10D-P1, "BX Chassis, 10 Degrees" (IronRidge Parts Catalog) |
| Material (per IronRidge) | BASF Ultramid glass-reinforced polyamide (nylon) |
| Ballast capacity (per IronRidge manual) | 4 full-size (16" × 8" × 4") or 8 half-size (16" × 8" × 2") concrete blocks, nominal |
| Ballast block requirements (per IronRidge manual) | ASTM C 1491 pavers; freeze-thaw resistant where local conditions require; 3000 PSI minimum compressive strength; 28–34 lbs (full) or 14–17 lbs (half), ±2 lbs |
| Row spacing (per IronRidge manual) | Depends on module width. Example: 51" for modules 38.5–39" wide. The manual gives a full table. |
| Roof pitch (per IronRidge manual) | Approved for roof pitches up to 7 degrees |
| Module orientation (per IronRidge manual) | Landscape |
| UL listings (per IronRidge manual) | IronRidge's BX manual lists the BX System as UL 2703 and UL 3741 listed (#5014158, #5025960). It says the UL 2703 scope of evaluation includes bonding, grounding, mechanical loading and fire classification. |
| Fire rating (per IronRidge manual) | Class A system fire rating per UL 2703 at any system tilt with module types 1, 2, 3, 13, 16, 19, 22, 25, 29, 30 and 38 on low-slope roofs (under 9.5 degrees) |
| Warranty (per IronRidge) | 25 years for products and 10 years for accessories and electrical junction boxes, from shipment. The 5-year finish warranty does not apply to mill aluminum, pre-plated steel or polymeric products. See IronRidge Limited Warranties and Disclaimer (Warranty.IronRidge.2025). |
| Source | IronRidge Parts Catalog, Version 3.66 (2026); IronRidge BX System Installation Manual, Version 4.2 (2026); IronRidge BX Ballasted System Datasheet, Version 1.30; IronRidge BX Chassis Tech Brief, Version 1.20; IronRidge Limited Warranties and Disclaimer (Warranty.IronRidge.2025) |
What You May Also Need
Usually required
- Module clamps: A BX bottom clamp and a BX top clamp, such as the 35mm top clamp, at each module corner.
- Bonding and grounding: IronRidge uses 8" module bonding jumpers between modules, 38" row bonding jumpers between rows, and one PV module grounding lug per continuous array.
- Concrete ballast blocks: Sourced locally, in the quantity shown on the project's ballast plan.
May be required
- Roof anchors: For anchored or hybrid layouts, IronRidge uses the BX Flat Roof Mounting Assembly (BX-MA-FRA-M1) with an IronRidge Flat Roof Attachment and locally sourced strut.
- Slip sheets: IronRidge says slip-sheet needs depend on the roofing material, maker and location. Ask the roofing manufacturer.
Optional upgrades
- The 5° chassis: See the BX 5° chassis.
Check current manufacturer documentation before combining components, especially batteries, inverters, communications equipment and system-control hardware.
Important Considerations
- Clamp placement. IronRidge's manual says clamps go on all four corner bolt positions that hold a module. The north end of the north row and the south end of the south row do not need clamps.
- Ballast plan. IronRidge's Design Assistant creates a ballast map showing the blocks needed in each chassis. Do not guess block counts.
- Anchor locations. IronRidge's manual says anchors shall not be placed on a perimeter south row.
- Handling. IronRidge says to always wear gloves when handling BX chassis.
- UL 3741 projects. IronRidge's UL 3741 listing applies with the equipment and steps in its BX UL 3741 Installation Addendum.
- Roof slope. IronRidge's BX manual says BX is approved for roof pitches up to 7 degrees. It also says to make sure the roof is in good condition before installing.
- Check your module. IronRidge's BX manual lists the modules tested or evaluated with BX, by maker, model and frame height. BX modules are installed in landscape orientation, per the manual.
- Engineering and permits. IronRidge says actual structural capacities are defined by PE-stamped certification letters. Use IronRidge's Design Assistant for the layout and ballast plan, and install under local codes.