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45/60 Minute Laminated Core Door Frames now approved for pair of doors
Ferche Millwork recently conducted a full-scale test of the Laminated Core Fire Rated Door Frame at the Intertek Testing facility in Middleton, WI. Being tested was the aforementioned frame sized at 72″ (6/0) wide by 96″ (8/0) high. The test resulted in the frame being approved for a paired door application, in sizes up to 6/0 x 8/0, for 45 and 60 minute ratings. Prior to this test, the Laminated Core door frames were only certified for single door applications.
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Fire Rated Door Frames
We’ve created a FIRERATED DOOR FRAME microsite where architects, designers and builders can gather information on this new group of products.
FIRERATED 20-minute wood frames are available in a variety of wood species and configurations. We’ve been making them for years now under the Warnock Hersey certification system that is the industry standard. FIRERATED 20-minute jambs are available in solid wood with a tee-stop and veneered over a particle board core.
FIRERATED 45, 60 and 90-minute frames are made using a durable laminated core incorporating an inorganic intumescent compound that expands when exposed to heat in a fire. Veneer faces with matching edge strips in a variety of wood species gives the architect and designer the flexibility to integrate the beauty of matching wood frames into a fire-rated door system. Carpenters love it because it’s easy to install and looks like solid wood. FIRERATED 45, 60 and 90-minute frames open the door to an entirely new set of options for architects and designers who require fire-resistance, but were previously limited to metal frames. Construction for hospitality and multi-family will never be the same.
At www.fireratedwooddoorframe.com we show 20-minute, 45-minute, 60-minute and 90-minute door frames and visitors can download brochures, line drawings, installation instructions and a 3-part architectural specification. When your project calls for fire-rated door frames or jambs and the natural beauty of wood, visit www.fireratedwooddoorframe.com to learn how FIRERATED products can help you.
Statement of Environmental Stewardship April 2009
Ferche Millwork is committed to responsible management and use of the forest products resources used to produce the beautiful millwork products we manufacture. Our commitment begins at the Ferche Mt Pleasant lumber concentration facility where we receive random width and length lumber from sawmills, many of which are located in the Appalachian region of the United States. The Appalachian region is recognized by the United States Forest Service as a “Sustainable Hardwood Forest”. This lumber is air-dried for an appropriate period of time and then kiln-dried in kilns powered by sawdust from near-by sawmills.
Kiln dried lumber is then ripped in our manufacturing facilities where technology
enables us to “optimize” each individual board to maximize its use. Each “optimized” board will yield moulder blanks of various widths. These blanks are chopped into a variety of lengths eliminating any natural or manufactured defects. Longer lengths are processed into mouldings and shorter lengths find their way into component parts, edge trim or finger-joint core for our veneer operations. Sawdust, shavings and fines are burned to produce steam to power the Minnesota kilns and to heat the manufacturing buildings. Excess residues are sold into the agricultural and fuel markets resulting in no waste.
At Ferche we embrace “green” with processes that greatly reduce waste and sustain valuable natural resources. We buy lumber from sawmills which selectively harvest trees from the forest. Our “lean” manufacturing philosophy has nurtured the development of processes which give a higher yield of finished goods from the raw materials. We have implemented the use of minimal amounts of material for set-up. The template production system along with operator-set precision tolerances assure that our profiles match, allowing our customers to use short lengths of material (casing heads will match casing sides) and not just long lengths that potentially can result in waste on the job site. Ferche’s philosophy of “100% usable” material means less waste on the jobsite since we remove defects and channel this residue into the most appropriate use before it reaches our customer. Our commitment to responsible resource management predates 1985 when Ferche Millwork received a National Award for Energy Innovation for its proactive approach to recycling wood byproducts for fueling its boilers to heat kilns and buildings.
In April of 2009 Ferche Millwork was granted Forest Stewardship Council (FSC) Chain of Custody Certification by Scientific Certification Systems (SCS) who is accredited by the FSC to certify companies to their international standards. While many certification systems provide assurances that the resources are responsibly managed, FSC is the only system currently accepted under the United States Green Building Council’s LEED program.
Here’s how FSC works:
- The process starts with the landowner achieving certification from FSC that the
forest will be managed according to FSC standards. - Each entity involved in the processing of timber harvested from FSC forests must apply and be approved with “Chain-of-Custody” certification to guarantee that products made and labeled as FSC are truly made from that resource. This certification requires an audit and proof that systems exist to keep FSC materials separate from non-FSC materials. Simply stated, each entity that takes ownership, from the forest to the builder, including all successive stages of processing, transformation, manufacturing and distribution need to be “Chain-of-Custody” certified. Only operations covered by an FSC CoC certificate are allowed to label products with the FSC trademarks. Ferche’s certificate number is SCS-COC-002319.
- There are a variety of FSC labels. Ferche will offer “FSC Pure” products and “FSC Mixed” products. “FSC Pure” labeled millwork will be made from 100% FSC lumber, particle board or veneer. “FSC Mixed” labeled millwork may be made from a mix of FSC certified raw material and non-FSC raw material (i.e. FSC certified particle board and non-certified veneer).
- When you place an order for FSC labeled products, Ferche will acquire certified raw materials from authorized Chain-of-Custody providers. We will keep those materials segregated and controlled and you can be assured that your FSC labeled millwork comes from a forest managed according to FSC standards.
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Face Checking of Veneered Jambs
Invariably we receive a few calls during the winter that our wrapped veneered jambs are cracked (the veneer faces are checked). Without becoming too technical, face checking is caused by a change in moisture content i.e. drying or wetting. We buy veneer at a specific moisture content and maintain it in a humidity controlled environment targeted at 30% relative humidity which is approximately what you can expect in the typical home. However, during the winter, outside humidity can drop to practically nothing and forced air heating systems can dry a home down to less than 10% relative humidity. This puts a lot of pressure on the veneer face. Here are some bullets about humidity and face checking that might be helpful:
- Face checking in veneer is inevitable if moisture loss occurs in a dry environment, but its importance depends upon the size and distribution of the checks themselves. The reason for the checking is that the moisture content (MC) of the face veneer and the panel core are different than the existing EMC (equilibrium moisture content).1
- The shrinking and swelling of wood across the grain with changes of MC, is one of the most important factors in veneer checking. Checks are formed when stress failures occur in the face of the veneer, caused by differential shrinking or swelling between the face veneer and the panel substrate, particularly when the face veneer and panel substrate have different EMC’s after panel assembly. The veneer is only restrained on its inner face; consequently, any shrinkage of the veneer imposes a tensile stress on its outer face, and thus a tendency to check. Conversely, the swelling of wood as a result of moisture absorption [splashing on water-based stain] introduces a compressive stress on the outer face, and the restraint imposed by the glue-line may impart a permanent compression set. The effect of this compression set is to cause a permanent reduction in size when the veneer re-dries. This reduction can only affect the outer surface, therefore, checking occurs.1
- Water based fillers, stains and primers which will increase the MC of face veneer should not be used in finishing….adding water to veneer makes checks more likely.2
- We have invested in systems to maintain a relative humidity in our plant to significantly reduce checking but we have no control over the product once it leaves our plant.
- When we get a finished jamb back that is checked, we look to see if there is stain or primer in the crack. If there is, it was most likely checked before finishing. If there is not, it was most likely checked during the finishing process. In either case, it may have left our plant without checks.
- In many cases checks will close back up once the product is put back into an environment with at least 30% relative humidity. This is why often we get jambs back and can’t find anything wrong with them.
- We know this is frustrating for you and your customers but it is equally frustrating for us. We can’t warrant what we can’t control. In summary, if wrapped jambs leave a humidity-controlled plant and go into an uncontrolled storage area, are finished with a water-based stain or primer and dried again in an oven or in a house with space heaters blasting, there’s a chance they will check. However, we make thousands each day that don’t.
1 Forest Products Journal Vol. 53 #10 page 80
2 Forest Products Journal Vol. 53 #10 page 81
