UC4C

Ground contact or fresh water Critical structural components

Exposed to all weather cycles, severe environments extreme decay potential

Decay fungi and insects with extreme potential for biodeterioration

Land & Freshwater piling, foundation piling, crossties & utility poles (severe decay areas)

Sawn Product

0.60

0.6

0.31

Round piling

0.80

0.8

0.41

Posts

0.60

0.31

UC 4A, B, & C

Ground Contact

Decay fungi and insects & high value products

All

Poles

0.60

0.6

0.31

Crossties

0.40

UC5A

Salt or brackish water and adjacent mud zone Northern waters

Continuous marine exposure (salt water)

Salt water organisms

Piling, bulkheads, bracing

Sawn Product

1.5

1.9

Piles

1.5

UC5B

Salt or brackish water and adjacent mud zone NJ to GA, south of SanFran

Continuous marine exposure (salt water)

Salt water organisms Including creosote tolerant Limnoria tripunctata

Piling, bulkheads, bracing

Sawn Product

2.5

Piles

2.5

UC5C

Salt or brackish water and adjacent mud zone South of GA, Gulf Coast, Hawaii, and Puerto Rico

Continuous marine exposure (salt water)

Salt water organisms Including Martesia, Sphaeroma

Piling, bulkheads, bracing

Sawn Product

2.5

Piles

2.5

UC 5A, B, & C

Marine Exposure

Continuous marine exposure (salt water)

Salt water organisms

All

Plywood

2.5