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Able Sheet Metal 4" Galvanized Steel Fan Jack - Regular Base with 4/12 Pitch
Regular price $49.12Orders start at $399 — combine any items to reach the minimum. Learn more
Able Sheet Metal 4" Galvanized Steel Fan Jack - Regular Base with 4/12 Pitch
This is a 4-inch galvanized steel fan jack, regular base with 4/12 pitch, from Able Sheet Metal. Made from ASTM A653 steel and sold as one piece. The 4/12 pitched base sits flush on steeper roofs and pairs with the matching fan jack top, sold separately.
Key Features:
- 4/12 pitched base: Regular base formed to a 4/12 roof pitch for a snug fit.
- ASTM A653 steel: Galvanized steel meeting ASTM A653 for corrosion resistance.
- 4-inch opening: Sized for 4-inch exhaust duct applications.
- Solid weight: Approximately 3.22 lb per piece.
- Single piece: Sold as one fan jack base per order.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Able Sheet Metal |
| Manufacturer model | 4FJR4 |
| Sell unit | 1 piece |
| Product line | Able Sheet Metal flashings |
| Profile / style | Fan jack, regular base, 4/12 pitch |
| Nominal size | 4 in. |
| Material | Steel |
| Finish | Galvanized |
| Applicable standards | ASTM A653 |
| Weight | 3.22 lb |
| Intended use | Roof jack base for 4-in. exhaust fan ducting on 4/12 pitch roofs |
| Pack quantity | 1 piece |
Fit and Compatibility:
Pairs with the matching 4-inch fan jack top, sold separately. The 4/12 pitched base fits roofs at or near a 4/12 slope; for low-slope or other pitches, choose the corresponding base variant.
Frequently Asked Questions (FAQ):
Q: What roof pitch does it fit?
A: The base is formed for a 4/12 pitch.
Q: What duct size does it accept?
A: It is sized for 4-inch duct.
Q: Is the top included?
A: No, the fan jack top is sold separately.
Q: What material and standard?
A: Galvanized steel conforming to ASTM A653, weighing about 3.22 lb.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Match the base pitch to the roof slope so the flange sits flat and seals properly; a 4/12 base on a flatter roof will leave gaps at the upslope edge. Integrate the flange into the shingle courses per manufacturer instructions and seal penetrations per local code, then finish with the matching 4-inch top.
Roof installation requires fall protection and adherence to local building codes for penetration flashing.
Order the Able Sheet Metal 4" Galvanized Fan Jack with 4/12 pitch base for pitched-roof exhaust venting.
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