Contents
Does plywood need to be stamped?
Each panel or sheet of plywood has a stamp on the back that gives all the information you need. Table 9 lists some uses for construction grade plywood. The number on the left indicates the maximum recommended span in inches when the plywood is used as roof decking (sheeting.
What does a grade stamp on the back of a wood structural panel indicate?
Their trademark grade stamp identifies each panel, lists its specifications and intended use. RATED SIDING – APA Rated Siding products include plywood, over laid oriented strand board (OSB) and composite materials. They are available as panels or lap siding.
What do stamps on lumber mean?
When a building is inspected, the inspector will look for a grade stamp on the lumber. This grade stamp is the only way for the inspector to determine if the lumber used in the structure is acceptable. The grade stamp is extremely important to building inspectors, as it is required by all building codes.
What does the color mean on plywood?
The colors on the end of the sheet are for the size and if its sanded on one side or both. 1. redhdedstpchild210. 8y. The only ratings that are standard on plywood industry-wide are the APA standard printing on the face of the board.
How Far Can 3/4 plywood span?
Maximum span 24 inches where 3/4-inch wood finish flooring is installed at right angles to joists.
What may cause deterioration that is unique to wood?
The three primary sources of wood deg- radation are fungi (decay or rot), insects and weathering. In addition, fire can also degrade wood.
What does a grade stamp on a stick of wood mean?
That’s why every stick of lumber coming out of a sawmill is appraised by trained inspectors and given a grade stamp. This cryptic tattoo indicates that a piece of wood meets established standards for strength and stiffness, and it also offers useful information about the type of wood and how much moisture it contains.
Where can I get a plywood grade stamp?
The thickness of the panel is also included on the stamp. Consult with a professional installer, licensed contractor or, for detailed application and installation instructions, write to: APA- The Engineered Wood Association 7011 S. 19th Street, Tacoma WA 98466-5333. www.apawood.org Prime and paint or use two coats of opaque (solid color) stain.
What does the exposure durability stamp mean on plywood?
Plywood Grade Stamp Explained. The Exposure Durability Classification defines whether the panel should be used for interior or exterior applications: Exterior panels have a fully waterproof bond and are designed for applications subject to permanent exposure to the weather or moisture.
What do the stamps on a piece of jewelry mean?
These stamps stand for sterling silver. This means the piece of jewelry should be 92.5% pure silver mixed with another metal, usually copper. Silver on its own is very soft and needs another metal added to make solid jewelry.