| TYPE OF WOOD |
PAU LOPE Hardwood |
WESTERN RED CEDAR Softwood |
REDWOOD Softwood |
CCA PRESSURE TREATED SOUTHERN PINE Softwood |
| RESISTANCE
TO DECAY AND INSECTS (including
termites) |
Highest rating.
Natural insect and decay resistance throughout all fibers of the wood. Highest rated
termite resistance. |
Only the
highest grade heartwood is rated "acceptable", and only if the cost of replacing
the item would be moderate. Not considered to have useful terminate resistance |
Only the
highest grade heartwood is rated "acceptable", and only if the cost of replacing
the item would be moderate. Only foundation grade coast redwood is considered to have
useful terminate resistance. It is not immune however. |
Impregnated
with toxic preservatives. Its resistance is only as good as the completeness of treatment.
Knots and interior portions may not be thoroughly treated and may not or be destroyed by
insects. |
| DURABILITY OF SURFACE WHEN USED FOR DECKS |
Extremely hard and dense. Resists all types of punishment. |
Very soft surface. Scratches and dents easily. |
Very soft surface. Scratches and dents easily. |
Soft surface. Typical knots and imperfections result in poor surface
condition and appearance. |
| APPEARANCE
& WEATHERABILITY |
Magnificent
hardwood look. Natural variations of rich wood colors. Little or no knots. Clear lengths
up to 18’long. Maintains rich color with minimal oiling. If left natural, turns a
soft silver overtime. Resistant to shrinking, splinering twisting, twisting, cupping and
checking. |
Top grades look
beautiful when first installed. Difficult to maintain original color. If left natural,
turns black, then grays. Lesser grades contain knots and sapwood and deteriorate much more
rapidly. Resistant to spliten, twisting, cupping and checking. Long lengths not available |
Top grades look
beautiful when first installed. Difficult to maintain original color. If left natural,
turns black, then grays. Lesser grades contain knots and sapwood and deteriorate much more
rapidly. Resistant to spliten, twisting, cupping and checking. Long lengths not available |
Generally poor
appearance. Pressure treating makes wood brittle and susceptible to splintering, twisting,
shrinking, cupping and checking. |
| METHOD OF FASTENING |
Superior fastening with marine grade stainless steel screws or S.S. nails
recessed into surface. Will not pull loose or pop up. No tannic acid reaction with S.S
fasteners. |
Galvanized nails often splits wood, causing decay from water penetration.
Tannic acid in wood may react with galvanized nails, corroding fasteners and causing black
stains. nails can pop up |
Galvanized nails often splits wood, causing decay from water penetration.
Tannic acid in wood may react with galvanized nails, erroding fasteners and causing black
stains. nails can pop up |
Galvanized nails often splits wood, causing decay from water penetration.
Chemical treatment reacts with nails, erroding fasteners and causing black stains.
nails can pop up |
| OTHERS CHARACTERISTICS |
Very
strong.Very fire resistant.Class A-1 fire retardant.NFPA and UBC(Uniform Building Code)
Flame Spread 10min.-0 Flame Spread 30min.-5 Fuel contribuion 30 min.-0. As with any
hardwood,canbe sanded to restore its natural color and surface condition. |
Limited
Strength. Burns easily |
Limited
Strength. Burns easily |
Copper
chromated arsenic treatment is toxic and banned in many areas. splinters and sawdust
should be avoided. Not for use around pools, expect as substructure. Burning produces
toxic fumes. |
| WEIGHT PER CUBIC FOOT |
69 Ibs |
30lbs |
28lbs |
35lbs. |
| BEDING
STRENGTH: MODULES OF RUPTURE |
25,360 PSI |
6,800 |
7,900 PSI |
14,500 PSI |
| MODULES OF ELASTICITY |
3,140 |
930 |
1,100 |
1,980 |
| HARDNESS |
3,680 lbs. |
580 lbs. |
480 lbs. |
690 lbs. |
