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Pemko 346 Series Fire-Rated Aluminum Weatherstrip with Rain Drip Protection
The Pemko 346 is a fire-rated aluminum rain drip strip for the head of door frames. It deflects water away from the door gap while meeting UL 10C positive pressure fire test requirements and UL 4L10 listing for fire-rated door assemblies. Available in Clear Anodized, Dark Bronze Anodized, and Black Suede Powder Coat finishes, cut to length from 36" to 120".
Specifications
- Width: 2-1/2"
- Height: 5/8"
- Length Range: 36" to 120" (custom cut to order; add minimum 4" overage to door width)
- Material: Aluminum
- Finishes: Clear Anodized (C), Dark Bronze Anodized (D), Black Suede Powder Coat (BSP)
- Fasteners Included: SMS #6 x 5/8"
- Mounting: Slotted hole configuration for adjustable positioning
Certifications and Ratings
- UL 10C Fire Rated, Positive Pressure
- UL 4L10 Listed
- UL 1784 Smoke Tested
- BHMA Certified
- GREENGUARD Gold Certified
- 5-Year Manufacturer Warranty
Typical Applications
- Fire-rated door assemblies in commercial buildings
- Office, healthcare, education, and government facilities
- Multi-family and institutional properties requiring code-compliant door weathersealing
- Industrial and warehouse fire doors
Manufacturer Resources
Pemko/Markar Products Full Line Catalog
Product Specs
- Warranty:
- 5 Year
- Subcategory:
- Gaskets & Weatherstripping
- Product Group:
- Door Trim and Accessories
- Product Subgroup:
- Astragals, Gaskets and Weatherstripping
- Product Type:
- Weatherstripping
- ANSI/BHMA:
- BHMA Certified, Smoke Tested- UL1784, Fire Rated- UL10C- Positive Pressure, Underwriters Laboratory 4L10, GREENGUARD Gold Certified
- Commercial/Residential:
- Commercial
- Product Model:
- 346
- Product Dimension:
- W: 2-1/2", H: 5/8"
- Product Category:
- Door Trim and Accessories
- Product Substrate:
- Aluminum
- Department:
- Door Hardware
Pemko 346C-36 – Frequently Asked Questions
1) Will the Pemko 346 rain drip work on a fire-rated door assembly?
Yes. The 346 aluminum drip strip is UL 10C fire rated under positive pressure and carries Underwriters Laboratory 4L10 listing, so it can go on a rated opening without breaking the label. It is also UL 1784 smoke tested and BHMA certified. For a facility running smoke and draft control requirements, that combination is the reason to pick this drip over a plain aluminum one.
2) What length Pemko 346 do I order for a 36 inch door?
Order longer than the door. Pemko specifies adding a minimum 4 inches of overage to the door width, so a 36 inch door wants a 40 inch piece. The 346 is cut to order anywhere from 36 to 120 inches, with stocked lengths at 36, 40, 48, 52, 64, 76, 84, 100 and 120 inches. That overage lets the drip extend past the opening on both sides so runoff sheds clear of the jambs instead of down into the gap.
3) Where does the Pemko 346 mount, at the head of the frame or on the door?
Head of the door frame. The 346 is a drip strip that catches water running down the face above the opening and throws it clear of the door gap. It is 2-1/2 inches wide by 5/8 inches high, so plan for that projection out from the frame face and confirm nothing (a closer arm, an overhead stop, a card reader) sits in that band. It is not a door bottom or a jamb seal.
4) Does a rain drip strip replace door weatherstripping, or do I need both?
Both. A drip like the Pemko 346 sheds water off the head of the frame before it reaches the gap; it does not seal the perimeter. For the jamb and head seal itself you want a gasket product, for example the Hager 864S clear anodized adjustable jamb weatherstrip with a neoprene insert, or the Hager 862S with a neoprene insert for smoke and draft control. On a rated exterior opening it is common to run a drip at the head plus perimeter gasketing plus a door bottom.
5) I need a smoke seal, not a rain drip. What should I look at instead of the Pemko 346?
The 346 is a head drip and sheds water, so it is the wrong part if what you actually need is a gasket that seals the gap. For a press-on smoke seal, the Hager 726S in charcoal installs without a retainer. If you want a brush seal, the Cal-Royal BW-302 uses nylon brush in an extruded aluminum retainer. Worth noting the 346 itself is UL 1784 smoke tested, so on a rated opening it does not disqualify your smoke assembly, it just is not the sealing component.
6) What is the difference between the Pemko 346 head weatherstrip and the Hager 864S jamb weatherstrip?
They seal different parts of the same opening. The Pemko 346 is an aluminum rain drip strip for the head of the frame, 2-1/2 inches wide by 5/8 inch high, that throws water out past the door gap. The Hager 864S is an adjustable jamb weatherstrip in clear anodized aluminum with a neoprene insert, made for the strike and hinge jambs where the seal presses against the door edge. On an exterior opening a contractor typically uses both: the 346 across the head for the drip, and a jamb section down each side. Pick one on where it mounts, not on which seals better.
7) Can a Hager 726S smoke seal replace a Pemko 346 on a fire-rated opening?
They are not interchangeable. The Pemko 346 is an extruded aluminum section, 2-1/2 inches wide by 5/8 inch high, that is UL 10C positive pressure fire rated, UL 4L10 listed, UL 1784 smoke tested, and BHMA certified, and it carries a rain drip profile for exterior heads. The Hager 726S is a press-on smoke seal in a charcoal finish, which is an adhesive-applied gasket for smoke and draft control at the perimeter. If the drawing calls for a rain drip at the head of a fire door, the 726S does not provide that geometry; if the requirement is only a press-on smoke gasket at the jambs, the 726S is the form of product being asked for.
8) Do I need to order screws separately for the Pemko 346 drip strip?
No. SMS #6 x 5/8 inch fasteners ship with the 346. The strip has a slotted hole pattern rather than round holes, so you can shift it up, down, or side to side before you drive the screws, which matters when you are working to an existing frame that is not perfectly square.
9) Which finish of the Pemko 346 should I use to match dark bronze storefront?
Dark Bronze Anodized is the match for bronze anodized aluminum storefront and frames. The 346 comes three ways: Clear Anodized for mill or clear aluminum openings, Dark Bronze Anodized, and Black Suede Powder Coat for painted black frames. All three are available across the full 36 to 120 inch length range.
10) Is the Pemko 346 aluminum drip strip OK for exterior use?
That is what it is for. The 346 is extruded aluminum, finished either anodized (clear or dark bronze) or with a black suede powder coat, all of which hold up on an exterior head condition. Its whole job is deflecting rain away from the top of the opening. Anodized aluminum on an exterior head is the standard commercial detail.
11) Does the Pemko 346 meet green building requirements for schools and healthcare?
It is GREENGUARD Gold Certified, which is the low-emissions criterion typically called out for schools and healthcare interiors. Combined with UL 10C positive pressure fire rating and BHMA certification, the 346 is specifiable on rated openings in facilities running both a code review and a sustainability standard.
12) What is a simpler alternative to the Pemko 346 for sweeping debris and light draft at a door perimeter?
The Cal-Royal BW-302 is a nylon brush weatherstrip with an extruded aluminum seal retainer. It uses a brush filament in an aluminum carrier rather than the rigid drip profile of the Pemko 346, which is a 2-1/2 inch wide by 5/8 inch high aluminum section with a rain drip for the head of the frame. The BW-302 suits interior and light-duty perimeter sealing where a brush is acceptable. Where the opening is exterior and needs water thrown clear of the head, or where the assembly must carry the 346's UL 10C positive pressure fire rating and UL 1784 smoke test, the brush strip is not the equivalent part.
13) For a 48 inch smoke and draft control opening, is the Hager 862S or the Pemko 346 the right weatherstrip?
It depends on what the seal has to do. The Hager 862S is a 48 inch weatherstrip with a neoprene insert intended for smoke and draft control, supplied at that fixed length. The Pemko 346 is cut to order anywhere from 36 to 120 inches, including a 48 inch length, and is a 2-1/2 inch wide by 5/8 inch high aluminum profile with a rain drip, UL 10C positive pressure fire rated and UL 1784 smoke tested. A buyer sealing an interior smoke-rated pair against draft is buying the compressible neoprene seal of the 862S; a buyer at an exterior head who also needs water deflection is buying the 346 profile.
14) Which aluminum weatherstrip matches a clear anodized finish already installed on the jambs?
The Hager 864S is a clear anodized aluminum jamb weatherstrip with a neoprene insert, and the Pemko 346 is offered in Clear Anodized Aluminum across its full 36 to 120 inch cut-to-length range. A property manager standardizing an opening in clear anodized can run the 864S down the jambs and the 346 across the head and keep one appearance around the frame. The 346 also comes in Dark Bronze Anodized Aluminum and Black Suede Powder Coat if the building standard is a darker frame.
15) Is the Pemko 346 handed, or does one part number cover left and right hand doors?
Not handed. The 346 is a straight extrusion that runs across the head of the frame, so swing and hand make no difference to what you order. Finish and length are the only two things you specify.
16) Is the Pemko 346 rated for commercial use or is it a residential product?
Commercial. The 346 is a commercial-grade product, and its rating package (UL 10C positive pressure, UL 4L10, UL 1784 smoke, BHMA) is aimed at rated openings in offices, healthcare, education, government, multi-family and warehouse buildings rather than at a house.
17) Do brush weatherstrips like the Cal-Royal BW-302 and aluminum drip strips like the Pemko 346 install the same way?
No. The Cal-Royal BW-302 carries its nylon brush in an extruded aluminum seal retainer, so the retainer is fastened and the brush rides in it. The Pemko 346 is a one-piece aluminum section with a slotted hole configuration that lets the strip be shifted for position before the SMS #6 x 5/8 inch screws are set, and it ships with those fasteners. A contractor ordering the 346 adds a minimum 4 inches of overage to the door width when specifying length, since it is cut to order from 36 to 120 inches.
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Does the Pemko 346C-36 come with a warranty?
Absolutely. The Pemko 346C-36 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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