Wood Treatement

Question 1

redwood: naturally occurring resins =

Answer 1

resistant to moisture/insects.

Question 2

common sources of damage:

Answer 2

fungi when moisture,
insects/termites/marine borers,
fire.

Question 3

preservatives: applied by

Answer 3

brushing/dipping/pressure treatment

Question 4

most effective preservative applicaiton

Answer 4

pressure treating

Question 5

distillate of coal tar.

protects against insects.

Answer 5

creosote

Question 6

ex. protect railroad ties, marine timbers, roadway guard posts.
not used in building construction.

Answer 6

creosote

Question 7

pentachlorophenol (aka penta) is an example of this type of preservative:

Answer 7

oil-borne

Question 8

pentachlorophenol (aka penta) uses:

Answer 8

utility poles/
fresh water pilings/
bridge timbers.

Question 9

pentachlorophenol (aka penta) typ. not used on building applications,
sometimes @

Answer 9

glulam long spans in arenas/pools.

Question 10

most common preservatives in building.

protection against termites and decay.

Answer 10

waterborne preservatives:

Question 11

advantages of this preservative: clean, odorless, non staining.
leave wood paintable.

Answer 11

waterborne preservatives:

Question 12

examples of this preservative type:
ammoniacal copper quaternary (ACQ)
*aka alkaline copper quat.
copper azole,
sodium borate (SBX)

Answer 12

waterborne preservatives:

Question 13

chromated copper arsenate (CCA)

Answer 13

waterborne preservative,
no longer used,
bc arsenic.

Question 14

ACQ and copper azole,
more corrosive than CCA,
to:

Answer 14

fasteners/flashing (aluminum)

Question 15

fasteners to spec for use w ACQ and copper azole.

Answer 15

304 or 316 stainless steel,

or hot-dip galvanized w min G90 coating.

Question 16

problem w preservatives w borates:

Answer 16

leach when moisture.

use protected, not at ground.

Question 17

treat w copper naphthenate solution, containing ≥2% copper, when:

Answer 17

when cuts made to treated wood