Transcript deckings - Thermory Russia

THERMORY PINE
GRADING
2013
WWW.THERMORYUK.CO.UK
Thermory Pine – Visual Grading Rules for Natur
Wood qualities / Defects
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Grading process
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Visual Grading Rules
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General characteristics
Thermory Pine
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Sound Knot
Splay knot
Edge knot and Arris knot
Knot cluster
Pin knot
Black and Dead knot
Broken knot
Loose knot and Hole
Rotten knot
Bark ringed knot
Resin pocket
Heart wood and Heart
Rot
Log blue stain and Mould
Insect holes
Wane
Top rupture
Bark pocket and Scar
Shake
Cup and Twist
Spring and Bow
Hit & Miss
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Grading Process
Grading is done over 3 stages:
• When kiln dried raw material arrives to factory
• After the boards are split, through cut etc just before the thermo
treatment phase
• Final grading is after thermo-treatment and after profiling (planning).
This is when the “face” of the board is choosen.
Thermory Pine
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Visual Grading Rules for Thermory Pine
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FACE
Graded face - Smooth, without visible mechanical damage from tools. No Hit & Miss allowed
Ungraded face - Cutting marks max 2mm width allowed
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KNOTS
Bark ringed knot - Allowed 5 knots within 2 metres. Maxium knot size is 20% of piece’s width
Black & Dead fixed knots - Allowed, at face area maximum size 20% of piece’s width, at edges maximum size
50% of piece’s thickness
Broken knot - Allowed when breakage is invisible after installation. Small cracks inside healthy knots are allowed
Edge and Arris knot - Allowed in all sizes, when solid
Knot cluster - Allowed, when knots’ within cluster are solid
Loose knot and hole - Not allowed, if loose knot or hole is visible in usage
Pin knots - Sound < 10mm are allowed
Rotten knot - Not allowed
Sound knot size - Solid sound knots allowed max. ½ of the width
Splay knot - Sound knot rules apply to sound splay knots
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Impregnated Pine
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Visual Grading Rules continued
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OTHER CHARACTERISTICS
Bark pocket and Scar - 1 bark pocket and scar (L 120mm x W 20mm) within 2 metres. Must be solid on top.
Heart wood and Heart - Allowed, heart is a natural quality for sawn heart wood pine
Insect holes - Not allowed
Mould - Not allowed
Resin pocket - 3 resin pockets (W 10mm x L 50mm) allowed within 2 metres
Rot / decay - Not allowed
Shake / Surface crack - Shallow and short allowed. Through and ring shake not allowed. Continuous cracks not
allowed. Maximum area of breakage is 50sqmm.
Top rupture - Allowed, maximum 50% out of piece’s width
Wane - Not allowed
Cup - Allowed 2% of piece’s width within 2 metres
Twist - Allowed 10% of piece’s width within 2 metres. Permitted as long as the board can easily be mounted
Spring - Allowed 4 mm within 2 metres
Bow - Allowed 15 mm within 2 metres
A maximum of 3% of pieces within a pack can be of a lower quality than Natur.
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THE FOLLOWING PHOTOS ARE NOT ALL OF THERMORY PINE.
Impregnated Pine
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General knot types
Source: RT-kortti
Sound knot
Dead knot
Arris knot
Splay knot
Barkringed knot
Spike knot
Thermory Pine
Black knot
Knot cluster
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Sound knot
Allowed to maximum of half
the board width
Thermory Pine
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Splay knot
Sound knot rules
apply also to
sound splay knots
Thermory Pine
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Edge and Arris knot
Edge knot
Allowed in all sizes, when solid
Arris knot
Thermory Pine
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Knot cluster & Scattered knots
Knot cluster
Allowed, when
knot’s within
cluster are solid
Scattered knots
Thermory Pine
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Pin knot
Pin knots =
sound knots
<10 mm are
allowed
Thermory Pine
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Black and Dead knot
Allowed, at face area maximum
size 20 % of piece’s width, at
edges maximum size 50 % of
piece’s thickness.
Black knot
Thermory Pine
Dead knot
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Broken knot
Allowed when breakage is
invisible after installation.
Small cracks inside healthy
knots are allowed.
Hole
Thermory Pine
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Loose knot and Hole
Not allowed, if loose knot
or hole is not invisible in
usage!
Impregnated Pine
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Rotten knot
Not allowed!
Thermory Pine
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Bark ringed knot
Allowed 5 knots within 2
metres.
Maximum knot size is 20 %
of piece’s width.
Thermory Pine
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Resin pocket
3 resin pockets (width
10 mm x lenght 100
mm) allowed within 2
meters.
Thermory Pine
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Heart wood and Heart
Allowed, heart is a
natural quality for
sawn heart wood pine
Thermory Pine
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Rot
Not allowed!
Thermory Pine
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Log blue stain and Mould
Not allowed!
Log blue stain
Mould
Mould
Mould
Thermory Pine
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Insect holes
Not allowed!
Thermory Pine
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Wane
Not allowed!
Thermory Pine
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Top rupture
Allowed, maximum 50 %
out of piece’s width
Thermory Pine
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Bark pocket and Scar
1 bark pocket and
scar (L 120 mm x
W 20 mm) within 2 meters. Must be solid
on top.
Scar
Bark pocket
Thermory Pine
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Shake and Surface cracks
Shallow and short allowed. Continuous cracks not allowed. Maximum area
of breakage is 50sqmm. Through
& ring shake not allowed!
Impregnated Pine
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Cup and Twist
Cup: Allowed 2 % of piece’s width within 2 meters.
Twist: Allowed 10 % of piece’s width within 2 meters, as long as board
can be easily mounted.
Twist
Cup
Thermory Pine
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Spring and Bow
Spring: Allowed 4 mm within 2 meters.
Bow: Allowed 15 mm within 2 meters.
Spring
Bow
Thermory Pine
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Hit & Miss
Not allowed!
Thermory Pine
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