USES FOR TREATED WOOD
UC3B (Above Ground exposed) – wood and wood -based materials used in exterior construction and not in contact with the ground. Materials do not require an exterior coating, but may be finished to achieve a desired aesthetics appearance. Materials are used for a variety of applications in either horizontal or vertical positions such as decking, sills, walkways, railings and fence pickets.
UC4A (Ground contact general use) – wood and wood-based materials used:
- In contact with the ground, fresh water, or other situations favorable to deterioration
- Above ground but are difficult to maintain, repair or replace and are critical to the performance and safety of the entire system/construction
- Above ground but may end up in ground contact or are subject to hazards comparable to ground contact due to climate, artificial or natural processes or construction
Examples are fence posts, deck posts, guardrail posts, structural lumber, joists and beams for decks and freshwater docks
HEAVY-DUTY GROUND CONTACT
UC4B (Ground contact heavy duty) – wood and wood-based materials used:UC4B (Ground contact heavy duty) – wood and wood-based materials used:
- In contact with the ground in severe environments
- In climates with high potential for deterioration
- In critically important components such as utility poles, building poles and permanent wood foundations
- In salt water splash zones
UC5A-C (Marine use) – wood and wood-based materials exposed to salt and brackish water
UCFA (Fire retardant interior) – used in interior construction where wood is not in contact with the ground and is protected from exterior weather
UCFB (Fire retardant exterior) – used in exterior construction that is not in contact with the ground but may be exposed to the full effects of weather.