The Solar Photovoltaic Bracket Fitting is a comprehensive mounting solution designed to securely attach solar panel racking systems to corrugated metal or asphalt shingle roofs. This all-in-one kit typically includes a heavy-duty Hanger Bolt, an adjustable L-Foot adapter, and a waterproofing EPDM washer. Our Solar Photovoltaic Bracket Fitting is engineered to withstand high wind loads and snow loads while maintaining the watertight integrity of the roof structure.
Product Overview: Manufactured from corrosion-resistant Stainless Steel A2 (304) or A4 (316), this kit is the backbone of residential and commercial solar installations. The dual-thread design of the hanger bolt allows it to anchor deep into the wooden rafters, while the upper machine threads provide a precise connection point for the L-Foot bracket.
Solar Photovoltaic Bracket Fitting Specifications
| Product Name | Solar Photovoltaic Bracket Fitting / Hanger Bolt Kit |
| Material | Stainless Steel A2 (304) / A4 (316) |
| Components | Hanger Bolt (M10/M12), L-Foot, Flange Nuts, EPDM Washer |
| Application | Metal Roof / Shingle Roof Solar Mounting |
| Wind Load | Up to 60m/s (Designed for High Durability) |
Engineering Insight: The Hanger Bolt System
Why is the Solar Photovoltaic Bracket Fitting preferred over simple clamps?
- Structural Integrity: The wood-thread end of the bolt penetrates the roof deck and screws directly into the structural timber (rafter). This provides pull-out strength far superior to surface-mounted brackets.
- Waterproofing: The integrated UV-resistant EPDM Washer compresses against the roof surface when the bottom nut is tightened. This creates a permanent seal, preventing rainwater from leaking into the drill hole.
- Adjustability: The L-Foot features a slotted hole (kidney hole), allowing installers to adjust the height and angle of the aluminum rails to level the solar array perfectly.
For more details on solar racking technology, please refer to the Photovoltaic mounting system entry on Wikipedia.
Installation Guide
- Locate the roof rafter and pre-drill a pilot hole through the roofing material.
- Drive the Hanger Bolt end of the Solar Photovoltaic Bracket Fitting into the rafter until the EPDM washer compresses slightly.
- Attach the L-Foot to the machine-threaded end using the provided flange nuts.
- Mount the aluminum solar rails to the L-Foot.
Frequently Asked Questions (FAQ)
Q: Is this compatible with aluminum rails?
A: Yes. The L-Foot is designed to connect universally with most standard aluminum solar rail profiles on the market.
Q: How long will these fittings last?
A: Made from 304 Stainless Steel, these fittings are designed to match the lifespan of the solar panels themselves (25+ years) without rusting.
Need Solar Mounting Kits?
Handan Bolt supplies complete Solar Photovoltaic Bracket Fittings directly to solar installers and EPC contractors. We offer pre-assembled kits to save installation time.
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