Looking at these numbers, and comparing them to other core alternatives like Timberstrand Laminated Strand Lumber, can help you weigh the pros and cons of each and determine if they meet your specific build specifications, budget, and more.
Here's a deeper look at various properties of pine, the most common type of lumber we use in our stave core; douglas-fir and white fir, two other types of wood that are sometimes used in our stave core; and Timberstrand LSL, one of the main alternatives to stave core. We’ll be looking at the density of the wood (average dried weight), the bending strength (modulus of rupture), and the crushing strength:
While we are on the subject of strength, stave core is used in doors carrying an
American National Standards Institute (ANSI) and Window and Door Manufacturers Association (WDMA) Extra Heavy Duty rating. LSL also falls into this category.
There are three different performance levels — Standard Duty, Heavy Duty, and Extra Heavy Dute. These ANSI/WDMA performance duty levels are based on the amount and severity of use. Focused on eight different attributes, the Extra Heavy Duty rating applies to doors in heavy-use, high-performance areas, such as classrooms, dormitories, and restrooms . There are three levels of duty based on performance values of eight different attributes as defined in the Section P. Extra Heavy Duty is intended for doors that will be subject to the most frequent and extreme usage.
When you're building a door, it is very important that the core meets all the appropriate standard and is built to stand up to even the most rigorous and frequent use.
Overall, these are comparable for the most part. All the above options have the same look, are strong enough to work in most applications, and ultimately work the same in the final product. However, as you can see from above, LSL is much heavier.
In most cases, opting for a lower-weight product is going to be your best and most cost-efficient option. Heavier LSL can end up significantly increasing your shipping costs, so any up-front cost savings may be negated. The extra weight also makes the door or final product more difficult to lift, maneuver, and install, which may increase labor costs and chances for injury.
All in all, opting to invest in stave core that’s made from less-dense pine or fir can give you an equal or better quality final product, while helping you reduce your shipping costs significantly. It also makes the final door or product lighter, which reduces stress on your machines and equipment and makes it easier to install.
Want to learn more about our stave core or request a sample?
For more information on our Stave Core, we have all the specs for:
Our samples are a great way to see our core in person, so you can make sure it meets the strict requirements for your products and customers.
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