ygmir wrote:gyre wrote:The technical name is waferboard, though most call it chipboard.
Particle board looks like mdf and is made of sawdust.
None are treated, as fencing is.
I thought the name was OSB: Oriented Strand Board
What is pictured is OSB. OSB differs from wafer board in that the wood strips utilized to manufacture it are mostly rectangular and woven/laid in mats in cross oriented layers to give it structural rigidity. It has replaced plywood in most construction applications as it can sustain higher load pressures and is significantly cheaper to manufacture. It is bonded together in the same manner that plywood is with a mixture of mostly wax and resin based adhesives. Composition of the material is approx 95% wood and 5% wax and resin. The wax being pressed into the wood during manufacture imparts a fairly substantial amount of moisture resistance and exposed OSB will last for several years with no significant loss of structural rigidity unpainted and exposed to the elements.
Wafer board is essentially nothing more than particle board except it utilizes wood chips instead of sawdust. Both are made in the same manner as OSB in terms being pressed and formed into the proper dimensional finished product. It is used primarily in the manufacture of cheap furniture that has a laminate finish. Wafer board has largely replaced particle board because it is lighter with the same amount of strength and it is not suitable for any kind of significant, load bearing construction since it's strength relies on glue and it has little, if any, moisture resistant properties.
In terms of burning OSB as part of an art installation, it is no different than burning non-pressure treated plywood.