EN 14081-4:2005/prA4

Timber structures - Strength graded structural timber with rectangular cross section - Part 4: Machine grading - Grading machine settings for machine controlled systems

Fourth amendment of new machine settings

Holzbauwerke - Nach Festigkeit sortiertes Bauholz für tragende Zwecke mit rechteckigem Querschnitt - Teil 4: Maschinelle Sortierung - Einstellungen von Sortiermaschinen für maschinenkontrollierte Systeme

Structures en bois - Bois de structure de section rectangulaire classé selon la résistance - Partie 4: Classement par machine - Réglages pour les systèmes de contrôle par machine

Lesene konstrukcije - Razvrščanje konstrukcijskega lesa pravokotnega prečnega prereza po trdnosti - 4. del: Strojno razvrščanje - Nastavitve strojev za razvrščanje pri strojno kontroliranih sistemih

General Information

• Status: Not Published
• ICS: 79.040 - Wood, sawlogs and sawn timber
• ICS: 79.120.10 - Woodworking machines
• Technical Committee: CEN/TC 124 - Timber structures
• Drafting Committee: CEN/TC 124/WG 2 - Solid timber
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 19-Oct-2008
• Due Date: 22-Sep-2009
• Completion Date: 19-Oct-2008
• Ref Project: SIST EN 14081-4:2005/kprA4:2008 - Timber structures - Strength graded structural timber with rectangular cross section - Part 4: Machine grading - Grading machine settings for machine controlled systems

Relations

• Merged Into: EN 14081-4:2005+A4:2008 - Timber structures - Strength graded structural timber with rectangular cross section - Part 4: Machine grading - Grading machine settings for machine controlled systems
• Effective Date: 22-Dec-2008
• Amends: EN 14081-4:2005+A3:2008 - Timber structures - Strength graded structural timber with rectangular cross section - Part 4: Machine grading - Grading machine settings for machine controlled systems
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 14081-4:2005/oprA4:2008
01-september-2008
/HVHQHNRQVWUXNFLMH5D]YUãþDQMHNRQVWUXNFLMVNHJDOHVDSUDYRNRWQHJDSUHþQHJD
SUHUH]DSRWUGQRVWLGHO6WURMQRUD]YUãþDQMH1DVWDYLWYHVWURMHY]DUD]YUãþDQMH
SULVWURMQRNRQWUROLUDQLKVLVWHPLK
Timber structures - Strength graded structural timber with rectangular cross section -
Part 4: Machine grading - Grading machine settings for machine controlled systems
Holzbauwerke - Nach Festigkeit sortiertes Bauholz für tragende Zwecke mit
rechteckigem Querschnitt - Teil 4: Maschinelle Sortierung - Einstellungen von
Sortiermaschinen für maschinenkontrollierte Systeme
Structures en bois - Bois de structure de section rectangulaire classé selon la résistance
- Partie 4: Classement par machine - Réglages pour les systèmes de contrôle par
machine
Ta slovenski standard je istoveten z: EN 14081-4:2005/prA4
ICS:
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
79.120.10 Lesnoobdelovalni stroji Woodworking machines
SIST EN 14081-4:2005/oprA4:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 14081-4:2005/oprA4:2008

SIST EN 14081-4:2005/oprA4:2008
EUROPEAN STANDARD
FINAL DRAFT
EN 14081-4:2005+A3:2008
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA4
June 2008
ICS 79.040; 79.120.10
English Version
Timber structures - Strength graded structural timber with
rectangular cross section - Part 4: Machine grading - Grading
machine settings for machine controlled systems
Structures en bois - Bois de structure de section Holzbauwerke - Nach Festigkeit sortiertes Bauholz für
rectangulaire classé selon la résistance - Partie 4: tragende Zwecke mit rechteckigem Querschnitt - Teil 4:
Classement par machine - Réglages pour les systèmes de Maschinelle Sortierung - Einstellungen von
contrôle par machine Sortiermaschinen für maschinenkontrollierte Systeme
This draft amendment is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee
CEN/TC 124.
This draft amendment A4, if approved, will modify the European Standard EN 14081-4:2005+A3:2008. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion
of this amendment into the relevant national standard without any alteration.
This draft amendment was established by CEN in three official versions (English, French, German). A version in any other language made
by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14081-4:2005/prA4:2008: E
worldwide for CEN national Members.

SIST EN 14081-4:2005/oprA4:2008
Foreword
This document (EN 14801-4:2005/prA4:2008) has been prepared by Technical Committee CEN/TC 124
“Timber structures”, the secretariat of which is held by SFS.
This document is currently submitted to the Unique Acceptance Procedure.
SIST EN 14081-4:2005/oprA4:2008
1 Modifications to Tables 1 to 9
Replace all Tables 1 to 9 with the following new Tables 1 to 11

SIST EN 14081-4:2005/oprA4:2008
Table 1 — Settings for Cook Bolinder (Tecmach) machine types SG-AR, SG-AF and SG-TF
c
Source Source Species Permitted Grade or Model value Comments and additional requirements
a b
country or mark timber sizes grade Force F
countries (mm) combination (kN)
UK GB Spruce C24 2,68 Requirements for grading:
35 ≤ t ≤ 75
n
Ireland IE Picea abies C16 2,27 - Air temperature between + 10 °C and + 35 °C;
60 ≤ b ≤ 300
n
Picea C16 1,24
- Relative humidity in the air ≤ 85 %;
sitchensis
- Timber temperature ≥ - 10 °C;
Pine C24 2,79
35 ≤ t ≤ 75 - Timber mean moisture content > 10 %;
n
Pinus nigra C16 1,91
60 ≤ b ≤ 300 - Maximum feed speed: 150 m/min.
n
Pinus
C16 1,34
sylvestris
The following equations shall be used to calculate settings for the
Chile CL Radiata pine C27 3,03
35 ≤ t ≤ 50 target size b × t . (NOTE  For timber with a thickness to tolerance
n
n n
Pinus radiata C16 1,43
class 1, i.e. sawn, t in the following equations is the target t + 1 mm.)
60 ≤ b ≤ 300 n n
n
C24 2,32
-1,299
a = 830,7 t   (mm)
C16 2,09
n n
C16 0,92
0,61
P = 4,412 F / t   (bar)
n n n
1.701
Fb t
n n
F =   (kN)
n
()413,9t + 57273
n
a
See 7.3 in EN 14081-1:2005.
b
Timber sizes shall be according to EN 336.
c
Grades prefixed by C are strength classes given in EN 338.

SIST EN 14081-4:2005/oprA4:2008
Table 1 — Settings for Cook Bolinder (Tecmach) machine types SG-AR, SG-AF and SG-TF (continued)
c
Source Source Species Permitted Grade or Model value Comments and adjustments for size
a b
country or mark timber sizes grade
countries (mm) combination ƒ
mod
Estonia EE Spruce C18 20,8 Requirements for grading:
30 ≤ t ≤ 75
n
Finland FI Picea - Air temperature between + 10 °C and + 35 °C;
C24 20,8
60 ≤ b ≤ 300
n
Latvia LV abies
C27 21,8 - Relative humidity in the air ≤ 85 %;
Norway NO
C30 28,5 - Timber temperature ≥ - 10 °C;
d
Russia RU
- Timber mean moisture content > 10 %;
C35 46,5
Sweden SE
C24 20,0 - Maximum feed speed: 150 m/min.
Poland PL
C40 54,5
The following equations shall be used to calculate settings for the
C30 30,6
Finland FI Pine
C18 23,8 target size b × t . (NOTE  For timber with a thickness to tolerance class
n n
Norway NO Pinus
1, i.e. sawn, t in the following equations is the target t + 1 mm.)
n n
Sweden SE sylvestris
0,61
Latvia LV
P = 4,412 F / t   (bar)
n n n
3 -12
F = (5,5I а b t )10   (kN)
n n n n n
-1,299
a = 830,7 t
n n
 
0.79
I
n = f
 
mod
0,22 0,24
t b
 
 n n 
a
See 7.3 in EN 14081-1:2005.
b
Timber sizes shall be according to EN 336.
c
Grades prefixed by C are strength classes given in EN 338.
d
Settings apply only to timber grown west of the Ural mountain range in Russia.

SIST EN 14081-4:2005/oprA4:2008
Table 1 — Settings for Cook Bolinder (Tecmach) machine types SG-AR, SG-AF and SG-TF (continued)
c
Source Source Species Permitted Grade or Model value Comments and adjustments for size
a b
country or mark timber sizes grade Force F
countries (mm) combination (kN)
Spain ES Scots pine C27 2,84 Requirements for grading:
35 ≤ t ≤ 75
n
Pinus C16 1,71 - Air temperature between + 10 °C and + 35 °C;
60 ≤ b ≤ 300
n
sylvestris
- Relative humidity in the air ≤ 85 %;
- Timber temperature ≥ - 10 °C;
- Timber mean moisture content > 10 %;
- Maximum feed speed: 100 m/min.

The following equations shall be used to calculate settings for the
target size b × t . (NOTE  For timber with a thickness to tolerance class 1,
n n
i.e. sawn, t in the following equations is the target t + 1 mm.)
n n
-1,299
a = 830,7 t
n n
0,61
P = 4,412 F / t
n n n
1.701
Fb t
n n
F =
n
()413,9t + 57273
n
Spain ES Corsican 40 ≤ t ≤ 70 C30 Not relevant Requirements for grading:
n
pine C18 as all settings - Air temperature between + 10 °C and 35 °C;
100 ≤ b
≤ 200
n
Pinus nigra
shall be - Relative humidity in the air < 85 %;
calculated - Timber temperature > - 10 °C;
using - Timber mean moisture content > 10 %;
equations in - Maximum feed speed: 100 m/min.
comments
column The following equations shall be used to calculate settings for the
target size b × t . (NOTE  For timber with a thickness to tolerance class 1,
n n
i.e. sawn, t in the following equations is the target t + 1 mm.)
n n
-1,299
a = 830,7 t
n n
0,61
P = 4,412 F / t
n n n
3 9
F C30 = (96,297 9 – 0,489 321 t )a b t / (1,318 943 3 × 10 )
n n n n n
3 9
F C18 = (54,497 9 – 0,489 321 t )a b t / (1,318 943 3 × 10 )
n n n n n
a
See 7.3 in EN 14081-1:2005.
b
Timber sizes shall be according to EN 336.
c
Grades prefixed by C are strength classes given in EN 338.

SIST EN 14081-4:2005/oprA4:2008
Table 2 — Settings for Computermatic and Micromatic machines
c
Source Source Species Permitted Grade or Model value Comments and additional requirements
a b
country or mark timber sizes grade Deflection a
countries (mm) combination (mm)
UK GB Spruce C24 6,35 Requirements for grading:
35 ≤ t ≤ 75
n
Ireland IE Picea abies C16 7,49
60 ≤ b ≤ 300 - Relative humidity in the air ≤ 85 %;
n
Picea
C16 13,78
- Timber temperature ≥ - 10 °C;
sitchensis
- Timber mean moisture content > 10 %;
Pine C24 6,10
35 ≤ t ≤ 75 - Maximum feed speed: 105 m/min.
n
Pinus nigra C16 8,90
60 ≤ b ≤ 300
n
Pinus C16 12,74
The following equations shall be used to calculate settings for the
sylvestris
target size b × t . (NOTE  For timber with a thickness to tolerance
n n
class 1, i.e. sawn, t in the following equations is the target t + 1 mm.)
n n
Chile CL Radiata C27 5,62
35 ≤ t ≤ 50
n
pine C16 11,86
60 ≤ b ≤ 300 F = 0,010 1 b t  (N)
n n n
n
Pinus
C24 7,35
radiata C16 8,13
36,71a 0,00567t + 0,7846
()
n
a =
C16 18,52
n
−5
t()0,9851×10 t b + 0,91
n n n
Actual deflection settings are determined from a /0,19 rounded to
n
the nearest whole number. Refer to calibration tables for machine
to convert force F to pressure setting
n
a
See 7.3 in EN 14081-1:2005.
b
Timber sizes shall be according to EN 336.
c
Grades prefixed by C are strength classes given in EN 338.

SIST EN 14081-4:2005/oprA4:2008
Table 2 — Settings for Computermatic and Micromatic machines (continued)
c
Source Source Species Permitted Grade or Model value Comments and additional requirements
a b
country or mark timber sizes grade
countries (mm) combination IP = f
mod
Norway NO Sitka C30 38,8 Requirements for grading:
33 ≤ t ≤ 53
n
spruce C18 27,9
- Relative humidity in the air ≤ 85 %;
88 ≤ b ≤ 218
n
Picea
- Timber temperature ≥ -10 °C;
Sitchensis
- Timber mean moisture content > 10 %;
- Maximum feed speed: 105 m/min.

The following equations shall be used to calculate settings for
the target size b × t where b and t are target dimensions.
n n n n
Refer to calibration tables for machine to convert F to pressure
n
setting.
F = 0,0101⋅b ⋅t  (N)
n n n
−0,814 0,152
⋅ ⋅
8063 t b
n n
a =  (Bits)
n
0,186 0,152
 
2,14 ⋅t ⋅b
n n
 
f ⋅ 1−
mod
 
f
mod
 
Actual deflection setting a shall be rounded to the nearest
n
whole number of Bits (Bits are units of 0,19mm).

If the actual thickness t
exceeds the target thickness t by more
a n
than 1 mm then the pressure shall be increased by
t 
a
 
 
t
 n
a
See 7.3 in EN 14081-1:2005.
b
Timber sizes shall be according to EN 336.
c
Grades specified by C are strength classes given in EN 338.

SIST EN 14081-4:2005/oprA4:2008
Table 2 — Settings for Computermatic and Micromatic machines (continued)
c
Source Source Species Permitted Grade or Model value Comments and additional requirements
a b
country or mark timber sizes grade Deflection a
countries (mm) combination (mm)
Finland FI Spruce C24 9,82 Requirements for grading:
30 ≤ t ≤ 75
n
Picea
Norway NO 60 ≤ b ≤ 300 C27 6,21 - Relative humidity in the air ≤ 85 %;
n
Sweden SE Abies
C30 4,75
- Timber temperature ≥ -10 °C;
Estonia ES
C35 3,40 - Timber mean moisture content > 10 %;
Latvia LV
C27 5,85 - Maximum feed speed: 105 m/min.
d
Russia RU
C16 8,92
Poland PL
The following equations shall be used to calculate settings for
C30 4,75
C18 9,82 the target size b × t where b and t are target dimensions.
n n n n
C30 4,46
Finland FI Pine
Refer to calibration tables for machine to convert F to pressure
C24 5,49 n
Norway NO Pinus
setting.
C18 8,92
Sylvestris
Sweden SE
C35 3,40
Latvia LV
C24 4,94
F = 0,0101b t   (N)
n n n
C18 7,96
0,186 −0,0901
50a
C40 2,83 t b
   
n n
a = 0,19   (Bits)
   
n
C27 5,49 50 150
   
t
n
Actual deflection settings a shall be rounded to the nearest
n
whole number of Bits (Bits are units of 0,19 mm).

If the actual thickness t exceeds the target thickness t more
a n
than 1 mm then the pressure shall be increased by
 
t
a
 
 
t
 n
a
See 7.3 in EN 14081-1:2005.
b
Timber sizes shall be according to EN 336.
c
Grades specified by C are strength classes given in EN 338.
d
Settings apply only to timber grown west of the Ural mountain range in Russia.

SIST EN 14081-4:2005/oprA4:2008
Table 2 — Settings for Computermatic and Micromatic machines (continued)
Source Source Species Permitted Grade or Model value Comments and additional requirements
a
country or mark timber sizes grade Deflection a
b
countries combination (mm)
(mm)
Finland FI Spruce TR26 6,21 Requirements for grading:
30 ≤ t ≤ 75
n
Norway NO Picea 60 ≤ b ≤ 300
- Relative humidity in the air ≤ 85 %;
n
Sweden SE Abies
- Timber temperature ≥ - 10 °C;
Estonia ES
- Timber mean moisture content > 10 %;
Latvia LV
- Maximum feed speed: 105 m/min.
c
Russia RU
Poland PL
The following equations shall be used to calculate settings

for the target size b × t where b and t are target
n n n n
dimensions.
Refer to calibration tables for machine to convert F to
n
Finland FI Pine
pressure setting.
Norway NO Pinus 2
F = 0,0101b t   (N)
n n n
Sweden SE Sylvestris
0,186 −0,0901
Latvia LV
50a
t b
   
n n
a = 0,19   (Bits)
   
n
50 150
t    
n
Actual deflection settings
...