Post on 19-Oct-2020
DRAFT
MALAYSIAN MTIB15TC1042R1
STANDARD
STAGE: PUBLIC COMMENT (40.20)
DATE: 25/5/2017 - 23/7/2017
Dressed timber, door jambs and general
mouldings - Specification
ICS: 91.060.50 Descriptors:Dressed timber, door jambs, general mouldings, specification
© Copyright 2017
DEPARTMENT OF STANDARDS MALAYSIA
MTIB15TC1042R1
© STANDARDS MALAYSIA 2017 - All rights reserved i
Contents Page Committee representation………………………………………………………………………… ii
Foreword…………………………………………………………………………………………… iii
Introduction………………………………………………………………………………………… iv
1. Scope…………………………………………………………………………................ 1
2. Normative references………………………………………………………….............. 1
3. Terms and definitions…………………………………………………………………… 1
4. Dimensional characteristic……………………………………………………………… 3
5. Timber…………………………………………………………………………………….. 3
6. Moisture content…………………………………………………………………………. 4
7. Quality control……………………………………………………………………………. 4
8. Grading requirements………………………………………………………………….... 4
9. Storage……………………………………………………………………………………. 5
Annex A Grading requirements for dressed timber, door jambs and general mouldings… 6
MTIB15TC1042R1
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Committee representation
The Industry Standards Committee on Timber, Timber Products and Timber Structures, under whose authority this Malaysian Standard was developed, comprises representatives from the following organisations: Construction Industry Development Board Malaysia Department of Standards Malaysia Forest Research Institute Malaysia Institution of Engineers, Malaysia Jabatan Kerajaan Tempatan Jabatan Kerja Raya Malaysia Malaysian Furniture Promotion Council Malaysian Panel-Products Manufacturers’ Association Malaysian Timber Council Malaysian Timber Industry Board (Secretariat) Malaysian Wood Industries Association Malaysian Wood Moulding & Joinery Council Malaysian Wood Preserving Association Sabah Timber Industries Association Sarawak Timber Association Sarawak Timber Industry Development Corporation Timber Exporters’ Association of Malaysia Universiti Putra Malaysia
The Technical Committee on Timber which supervised the development of this Malaysian Standard consists of
representatives from the following organisations:
Association of Malaysian Bumiputera Timber and Furniture Entrepreneurs
Construction Industry Development Board Malaysia
Forestry Department Peninsular Malaysia
Forest Research Institute Malaysia
Golden Pharos Berhad
Jabatan Kerja Raya Malaysia
Malayan Adhesives and Chemical SdnBhd
Malaysian Timber Council
Malaysian Timber Certification Council
Malaysian Wood Industries Association
Malaysian Timber Industry Board (Secretariat)
Malaysian Wood Moulding and Joinery Council
Malaysian Wood Preserving Association
Sarawak Timber Association
Sabah Timber Industries Association
Sarawak Timber Industry Development Corporation
Timber Exporter’s Association of Malaysia
Universiti Putra Malaysia
UniversitiTeknologi MARA
The Working Group on Dressed Timber, Door Jambs and General Mouldings which developed this Malaysian Standard
consists of representatives from the following organisations:
Forest Research Institute Malaysia
Malaysian Timber Industry Board (Secretariat)
Malaysian Wood Moulding and Joinery Council
Universiti Putra Malaysia
UniversitiTeknologi MARA
MTIB15TC1042R1
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Foreword
This Malaysian Standard was developed by the Working Group on Dressed Timber, Door
Jambs and General Mouldings under the authority of the Industry Standards Committee on
Timber, Timber Products and Timber Structures
Major modifications in this revision are as follows:
a. incorporation of new scope on “plantation timbers”;
b. incorporation of new clauses on “normative references”, “terms and definition”,
“dimensional characteristic”, “timber”, “moisture content”, “quality control” and
“storage”;
c. removal of definitions; and
d. incorporation of an annex on “grading for dressed timber, door jambs and general
mouldings”.
This Malaysian Standard cancels and replaces MS 1401:1996, Specification for dressed timber,
door jambs and general mouldings.
Compliance with a Malaysian Standard does not of itself confer immunity from legal obligation.
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Introduction
The regions of tropical hardwoods growth bridge countries and continents. The purpose of
grades is to maintain a standard between mills manufacturing the same or similar species
regardless of the character of the logs from which they are produced.
The timber products which quality levels are specifically addressed in these grading rules
include dressed timber, door jambs and general mouldings. Quality levels based upon intended
use was the basis of establishing grading requirements. This permits sawn timber or timber
products of a given grade to be used for the same purpose, regardless of the mill of origin.
Uniform grades also provide the buyers and sellers of timber products with a measure by which
they can be confident and/or understands the grade(s) under consideration.
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Dressed timber, door jambs and general mouldings - Specification
1 Scope
This Malaysian Standard describes the grading requirements applicable to dressed timber, door
jambs and general mouldings of premium, standard and utility grade manufactured from tropical
hardwoods and plantation timbers.
2 Normative references
The following normative references are indispensable for the application of this standard. For
dated references, only the edition cited applies. For undated references, the latest edition of
the normative references (including any amendments) applies.
MS 229:2009, Nomenclature and common uses of Malaysian Timbers
MS 360, Treatment of timber with copper/chrome/arsenic wood preservative - Specification
(Third revision)
MS 471-1:2001Glossary of terms relating to timber and wood-based panel products - Part 1:
Characteristics and properties of timber (First revision)
MS 837, Solid timber - Determination of moisture content (First revision)
ISO 9001, Certification for quality management systems
Tropical Hardwood Machined Lumber Products Grading Rules, September 1987
3 Terms and definitions
For the purposes of this standard, the following terms and definitions given in MS 471-1 and
the followings apply.
3.1 decay
Incudes wet rot and dry rot; it is the disintegration of wood resulting from the action of wood-
destroying fungi. It is usually accompanied by discolouration even in the early stages of attack.
NOTE. Infection by sap-stain fungi is not classed as decay.
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3.2 door jambs
The vertical member of the door frame in which a door is secured. Pre-assembled timber
structure, surrounding and supporting a door whether installed prior to the erection of the wall
or subsequently fixed to fit a given wall opening. It comprises two jambs, a header and
sometimes a transom and/or a threshold, either machined from solid stock or with a planted
doorstop.
3.3 dressed timber
Sawn timber planed on one or more surfaces; also known as wrought timber; D4S – dressed
four sides, i.e. on two faces and two edges; D3S – dressed three sides, i.e. on two faces and
one edge; D2S – dressed two sides, i.e. on two faces only; D1S – dressed one side, i.e. on one
face only
3.4 general mouldings
These include sawn timber which have been dressed to S4S and shaped to a profile that is no
longer square or rectangular in shape. General mouldings regardless of shape or profiles are
commonly manufactured to random length as well as to sets or fixed length. Cut-to-length shall
be graded as entirely usable.
3.5 plantation timbers
Timber obtained from forest-or timber plantations or planted timber.
3.6 premium grade
This grade is ordered when the ultimate in fine appearance is desired. It is the highest grade
produced and many of the pieces are absolutely clear and free of natural and machining
defects. The grade will allow for a few minor characteristics that do not detract from their
appearance and high quality. It is intended where a clear non-stain finish may be required.
3.7 standard grade
This grade is ordered when less demanding applications than premium grade is acceptable. It
will include pieces that are repaired by plugging, filling, or sanding, or include natural or
machining characteristics that are acceptable for a fine appearance. This grade is intended for
use where the products may be colour stained in finish than provided for in premium grade.
3.8 surfaced four sides (S4S)
These include timbers dressed or machine by the use of a planer or moulder to give a smooth
surface on four sides.
3.9 tropical hardwoods
All sawn hardwood timbers that grown in Malaysia and in regions with a similar climate.
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3.10 utility grade
This grade has many of the same characteristics present in standard grade but generally is less
restrictive in natural and machining characteristics. The product however must be able to
perform for the intended use. The grade is intended for lower end applications with an
acceptable product quality. Filling and sanding of characteristics is permitted to provide a quality
suitable for opaque paint finishes.
4 Dimensional characteristic
Dimensional characteristics of dressed timber, door jambs and general mouldings shall be in
accordance with those defines in the product standard, to which the product belongs.
All dimensions given shall be at reference moisture content in accordance with Clause 6.
Unless there is evidence to the contrary, it shall be assumed that the thickness and width of a
piece of timber increases or decreases by 0.25 % for every 1 % of moisture content above or
below the reference.
5 Timber
5.1 Species
A list of the most commonly used, but not limited to, species for dressed timber, door jambs
and general mouldings is described in Table 1, MS 229:2009.
5.2 Grade
The timber shall be free from decay and insect attack on better face except as listed in
Tables A1, A2 and A3.
Colour variation in timber shall be permitted.
5.3 Treatment
Preservative treatment of tropical hardwood shall be carried out in accordance MS 360. For
plantation timbers, other treatment method may be applied provided that methods of treatment
and chemical used are recorded.
Preservative treatment shall be carried out prior to delivery of dressed timber, door jambs and
general mouldings to the site. Any treated products that undergo subsequent cutting, shall be
applied with preservative and then allowed to dry.
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5.4 Defect - drying and machining defects
Drying and machining defects as defined in MS 471-1:2001 shall be permitted according to
Annex A in this standard.
6 Moisture content
Dressed timber, door jambs and general mouldings shall be protected to minimize the dimensional changes due to the fluctuation of equilibrium moisture content or physical damage which can reduce their durability or structural strength prior to installation.
The moisture content shall be of 12 % ± 2 % at the time of delivery of the products to building
site. The methods of determining the moisture content shall be in accordance with MS 837.
During installation, care shall be taken on the building site to ensure that dressed timber, door
jambs and general mouldings are supplied in dry condition is adequately protected from
weather.
7 Quality control
7.1 General
The manufacturer shall establish document and maintain a factory production control system
to ensure that the products placed on the market conform to the stated performance
characteristics. The factory production control system shall consist of procedures, regular
inspections and test and/or assessments; the results shall be used to control raw and other
incoming materials or components, equipment, the production process and the product, and
shall be sufficiently detailed to ensure that conformity of the product is apparent.
If the manufacturer operates a factory production control system conforming to the
requirements of ISO 9001, and made specific to the requirements of this standard, the above
requirements are considered to be satisfied.
7.2 Record of documentation
The results of inspections, tests or assessments requiring action shall be recorded, as shall any
action taken. The action to be taken when control values or criteria have not been met shall be
recorded. Records shall be kept for at least two years, but shall also fulfill the regulatory system
and/or the legal requirements of the country concerned.
8 Grading requirements
Dressed timber, door jambs and general mouldings shall be graded to premium, standard and
utility grade in accordance with Annex A.
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For the products made from plantation timbers, the grading requirements defined in Tables A1,
A2 and A3 are not applicable and shall be made to their respective grading rules.
9 Storage
Dressed timber, door jambs and general mouldings shall be delivered to the site under proper
protection and stored under closed environment and dry conditions. During storage, the
products shall be properly stacked accordingly.
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Annex A
(normative)
Grading for dressed timber, door jambs and general mouldings
A1 Grading for dressed timber, door jambs and general mouldings is carried out in accordance with Tropical Hardwood Machined Lumber Products Grading
Rules.
A2 Table A1 provides grading requirements for dressed timber.
Table A1 Grading fordressed timber
Natural characteristic Grade
Premium Standard Utility
Allowable natural characteristics on better face
1 Warp
1.1 Bow1 Not exceeding 38 mm in every 2 130 mm
length. Bow for other lengths in direct
proportion to this requirement.
As in premium grade. As in premium grade.
1.2 Crook (spring) Not exceeding 13 mm in 2 130 mm length
for set length and for random length
allowed within reasonable limit.
Not exceeding 19 mm in 2 130 mm length
for set length and for random length
allowed within reasonable limit.
Not exceeding 25 mm in 2 130 mm
length for set length and for random
length allowed within reasonable limit.
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1.3 Cup a) 0.75 mm in widths less than 150 mm.
b) 1.5 mm in widths greater than 150 mm
but less than 250mm.
c) 3 mm in widths greater than 250 mm.
As in premium grade. a) 1.5 mm in widths less than 150
mm.
b) 3 mm in widths greater than 150
mm but less than 250 mm.
c) 6 mm in widths greater than
250 mm.
1.4 Twist Not exceed 4mm deviation from plane in
every 50 mm width in 3 000 mm length.
Twist for other lengths in direct proportion
to this requirement.
As in premium grade. Not exceed 8mm deviation from plane
in every 50 mm width in 3 000 mm
length. Twist for other lengths in direct
proportion to this requirement.
2 Borer holes
2.1 Pin holes Based on a piece 50 mm wide, the
maximum number of pin holes in the piece
shall not exceed the number of 1 800 mm
multiples in each piece, i.e., one pin hole
per every 1 800 mm in length, or one pin
hole per 925 cm of surface area. This is
subject to the overall allowance that only
one pin hole is allowed to occur in any
650 mm2 of surface area. Horizontal pin
holes are not allowed.
Based on a piece 50 mm wide, the
maximum number of pin holes in the
piece shall not exceed the number of
300 mm multiples in each piece, i.e., one
pin hole per every 300 mm in length, or
six pin hole per 925 cm of surface area.
This is subject to the overall allowance
that only one pin hole is allowed to occur
in any 650 mm2 of surface area. However
up to 5 % of the total number of pieces in
any parcel can include lightly scattered
pin holes without clusters, i.e., not more
than 3 pin hole per 650 mm2 of surface
area. Horizontal pin holes shall be
repaired.
Scattered pin holes are allowed
provided they are neither so
numerous nor so grouped as to
materially affect the appearance of
the piece.
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2.2 Shot holes Not allowed Limit shall be on the basis of width and
for every 1 220 mm length supplied. Shot
holes shall be unstained, scattered and
repaired.
maximum number
Width @ 1 220 mm
25 mm & below 1 hole
26 mm - 75 mm 2 holes
76 mm - 150 mm 4 holes
153 mm - 300 mm 6 holes
The limits on pieces measuring 2 130 mm
and below but forming part of the random
length parcel supplied, shall be
determined on proportionate basis.
Scattered shot holes, whether stained
or unstained, allowed if plugged or
filled and smooth sanded.
2.3 Grub or
large borer holes
Not allowed Not allowed Not allowed
4 Resin pockets Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface are),
maximum one very small resin pockets not
exceeding 3 mm wide and 50 mm long in
each piece. This is subject their occurrence
does not exceed 5 % of the parcel or unit
of delivery.
Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface are),
maximum two very small resin pockets
not exceeding 3 mm wide and 50mm long
in each piece well filled and sanded. This
is subject their occurrence does not
exceed 5 % of the parcel or unit of
delivery.
Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface
are), maximum two medium resin
pockets not exceeding 3 mm wide and
200 mm long in each piece well filled
and sanded. This is subject their
occurrence does not exceed 10 %
of the parcel or unit of delivery.
5 Knots
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5.1 Sound knots Maximum 2 smooth machined knots, or
their equivalent smaller, the sum of their
diameters not exceeding 1/8 the width to
every length of 2 130 mm supplied.
Maximum 2 smooth machined knots, or
their equivalent smaller, the sum of their
diameters not exceeding 1/4 the width to
every length of 2 130 mm supplied.
Checked knots to be filled and sanded.
Maximum 2 smooth machined knots,
or their equivalent smaller, the sum of
their diameters not exceeding 1/3 the
width to every length of 2 130 mm
supplied. Checked knots to be filled
and sanded.
5.2 Unsound knots Not allowed Not allowed Maximum 2 smooth machined knots,
or their equivalent smaller, the sum of
their diameters not exceeding 1/3 the
width to every length of 2 130 mm
supplied. Checked knots to be filled
and sanded.
6 Compression
failure2 Not allowed Maximum one compression failure to
every 900 mm of length and subject that
no one compression failure shall be
allowed to exceed 1/3 the width of the
piece supplied.
Maximum two compression failure to
every 900 mm of length and subject
that no one compression failure shall
be allowed to exceed 1/3 the width of
the piece supplied.
7 Brittle heart Not allowed Not allowed Allowed in any amount, provided it
does not impair strength.
8 Checks Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface area),
one check is allowed if it does not extend
to the opposite face and subject to size
limit of 0.75 mm in width and 150 mm in
length and their occurrence does not
exceed 5 % of the parcel or unit of delivery.
Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface area),
one check is allowed if it does not extend
to the opposite face and subject to size
limit of 0.75 mm in width and 150 mm in
length and their occurrence does not
exceed 10 % of the parcel or unit of
delivery.
Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface
area), one check is allowed if it does
not extend to the opposite face and
subject to size limit of 1.5 mm in
width and 300 mm in length and their
occurrence does not exceed 10 % of
the parcel or unit of delivery.
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9 Splits Allowed if the length of the split does not
exceed the width of the piece, and their
occurrence does not exceed 5 % of the
parcel or unit of delivery. Splits are not
allowed in cut-to-length items.
Allowed if the length of the split does not
exceed the width of the piece, and their
occurrence does not exceed 10 % of the
parcel or unit of delivery. Splits are not
allowed in cut-to-length items.
Allowed if the length of the split does
not exceed twice the width of the
piece, and their occurrence does not
exceed 10 % of the parcel or unit of
delivery. Splits cannot exceed 1/6 the
length of the piece. Splits are not
allowed in cut-to-length items.
10 Sapwood Bright sapwood allowed without limitation.
Medium stained sapwood limited to 1/6 the
surface of the face, and provided their
occurrence does not exceed 5 % of the
pieces. Heavy stained sapwood is not
allowed.
Medium stained sapwood allowed
without limitation.
Bright sapwood or stained sapwood
not restricted.
Allowable machine defects on face
11 Skips Allowed on face and either of the two
edges provided they are light enough to
allow sanding to remove traces of skip
marks. Skip shall however be limited in
size to :
On face : 0.75 mm deep and 150 mm
long.
On edge : 0.75 mm deep and 300 mm long
and their occurrence shall not
exceed 10 % of the parcel or
unit of delivery.
Allowed on face and either of the two
edges provided they are light enough to
allow sanding to remove traces of skip
marks. Skip shall however be limited in
size to :
On face : 0.75 mm deep and 300 mm
long.
On edge : 0.75 mm deep and 600 mm
long and their occurrence
shall not exceed 10 % of the
parcel or unit of delivery.
Allowed on face and either of the two
edges provided they are light enough
to allow sanding to remove traces of
skip marks. Skip shall however be
limited in size to :
On face : 1.5 mm deep and 300 mm
long.
On edge : 1.5 mm deep and 600 mm
long and their occurrence
shall not exceed 10 % of
the parcel or unit of
delivery.
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12 Chipped grain Allowed if occurrence does not exceed
10 % of the surface of the piece in 10 % of
the parcel or unit of delivery.
Allowed if occurrence does not exceed
20 % of the surface of the piece.
No restrictions.
13 Torn grain Allowed if not exceeding 0.75mm deep and
not impairing the appearance of at least
85 % of the exposed surface. Their
occurrence shall not exceed 5 % of the
parcel or unit of delivery.
Allowed if not exceeding 0.75 mm deep
and not impairing the appearance of at
least 85 % of the exposed surface. Their
occurrence shall not exceed 15 % of the
parcel or unit of delivery.
Allowed if not exceeding 1.5 mm deep
and not impairing the appearance of
at least 85 % of the exposed surface.
Their occurrence shall not exceed
10 % of the parcel or unit of delivery.
14 Raised grain Allowed if 1mm deep, not to exceed 5 % of
the pieces.
Allowed if 1mm deep, not to exceed
10 % of the pieces.
Allowed if 1.5 mm deep.
15 Chip marks Allowed if not exceeding 0.4 mm deep and
subject to their occurrence does not
exceed 5 % of the parcel or unit of delivery.
Allowed if not exceeding 0.4 mm deep
and subject to their occurrence does not
exceed 10 % of the parcel or unit of
delivery.
Allowed if not exceeding 0.75 mm
deep.
16 Burn marks In 3 700 mm and longer pieces one per
piece is allowed, but burn marks may not
occur in more than 3 % of the parcel or unit
of delivery. Burn marks are not allowed in
lengths shorter than 3 700 mm.
In 3 700 mm and longer pieces one per
piece is allowed, but burn marks may not
occur in more than 5 % of the parcel or
unit of delivery. Burn marks are not
allowed in lengths shorter than
3 700 mm.
Allowed, provided non-indented.
17 Cutter marks Even and smooth to touch and not less
than 10 cutter marks per 25 mm.
As in premium grade. As in premium grade.
1) Bow is not applicable to this standard. 2) Compression failure is not applicable to this standard.
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A3 Table A2 provides grading requirements for door jambs.
Table A2 Grading for door jambs
Natural characteristic Grade
Premium Standard Utility
Allowable natural characteristics on better face
1 Warp
1.1 Bow1 Not exceeding 25 mm in every 2 130 mm
length.
As in premium grade. As in premium grade.
1.2 Crook (spring) Not exceeding 3 mm in 2 130 mm length. As in premium grade. As in premium grade.
1.3 Cup Not exceeding 0.75 mm in 125 mm width
or less, or not exceeding 1.5 mm in widths
greater than 125 mm.
As in premium grade. As in premium grade.
1.4 Twist Not exceed 4 mm deviation from plane in
every 125 mm width in 2 130 mm length.
Twist for other lengths in direct proportion
to this requirement.
As in premium grade. As in premium grade.
2 Borer holes
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2.1 Pin holes Base on a 125 mm nominal wide jamb, the
maximum number of pin holes in the jamb
shall not exceed three times the number of
2 130 mm multiples in each jamb, i.e.,
three pin hole per every 2 130 mm in
length, or approximately one pin hole per
925 cm of surface area. This is subject to
the overall allowance that only one pin hole
is allowed to occur in any 650 mm2 of
surface area. Horizontal pin holes are not
allowed.
Base on a 125 mm nominal wide jamb,
the maximum number of pin holes in the
piece shall not exceed three times the
number of running 300 mm multiples in
each jamb, i.e., three pin hole per every
300 mm in length. This is subject to the
overall allowance that only two pin hole is
allowed to occur in any 650 mm2 of
surface area.
However up to 5 % of the total number of
pieces in any parcel can include lightly
scattered pin holes without clusters, i.e.,
not more than 3 pin holes per 650 mm2 of
surface area Horizontal pin holes are not
allowed.
Scattered pin holes are allowed
provided they are neither so
numerous nor so grouped as to
materially affect the appearance of
the piece.
2.2 Shot holes Not allowed Limit shall be on the basis of width and
for every 1 220 mm length supplied. Shot
holes shall be unstained, scattered and
repaired and not occur in more than 20 %
of the pieces.
maximum number
Width @ 1,220 mm
25 mm & below 1 hole
26 mm - 75 mm 2 holes
76 mm - 150 mm 4 holes
153 mm - 300 mm 6 holes
The limits on pieces measuring 2 130 mm
and below shall be determined on
proportionate basis.
Scattered shot holes, whether stained
or unstained, allowed if plugged or
filled and smooth sanded.
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2.3 Grub or
large borer holes
Not allowed Not allowed Not allowed
4 Resin pockets Not allowed Based on a jamb 50 mm by 2 130 mm
(approximately 925 cm2 of surface are),
maximum two very small resin pockets
not exceeding 3 mm wide and 50 mm
long in each piece well filled and sanded.
This is subject their occurrence does not
exceed 5 % of the parcel or unit of
delivery.
Based on a jamb 50 mm by 2 130 mm
(approximately 925 cm2 of surface
are), maximum two medium resin
pockets not exceeding 3 mm wide and
200 mm long in each piece well filled
and sanded. This is subject their
occurrence does not exceed 10 % of
the parcel or unit of delivery.
5 Knots
5.1 Sound knots Maximum 2 smooth machined knots, or
their equivalent smaller, the sum of their
diameters not exceeding 1/8 the width to
every length of 2 130 mm supplied.
Maximum 2 smooth machined knots, or
their equivalent smaller, the sum of their
diameters not exceeding 1/4 the width to
every length of 2 130 mm supplied.
Checked knots to be filled and sanded.
Maximum 2 smooth machined knots,
or their equivalent smaller, the sum of
their diameters not exceeding 1/3 the
width to every length of 2 130 mm
supplied. Checked knots to be filled
and sanded.
5.2 Unsound knots Not allowed Not allowed Maximum 2 smooth machined knots,
or their equivalent smaller, the sum of
their diameters not exceeding 1/4 the
width to every length of 2 130 mm
supplied. The unsound proportion
must be removed and then filled and
smooth sanded.
6 Compression
failure2 Not allowed Maximum one compression failure to
every 900 mm of length and subject that
no one compression failure shall be
allowed to exceed 1/3 the width of the
piece supplied.
Maximum two compression failure to
every 900 mm of length and subject
that no one compression failure shall
be allowed to exceed 1/3 the width of
the piece supplied.
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7 Brittle heart Not allowed Not allowed Allowed in any amount, provided it
does not impair strength.
8 Checks Based on jamb 50 mm by 2 130 mm
(approximately 925 cm2 of surface area),
one check is allowed if it does not extend
to the opposite face and subject to size
limit of 0.75 mm in width and 150 mm in
length and their occurrence does not
exceed 5 % of the parcel or unit of delivery.
Based on a jamb 50 mm by 2 130 mm
(approximately 925 cm2 of surface area),
one check is allowed if it does not extend
to the opposite face and subject to size
limit of 0.75 mm in width and 150 mm
in length and their occurrence does not
exceed 10 % of the parcel or unit of
delivery.
Based on a jamb 50 mm by 2 130 mm
(approximately 925 cm2 of surface
area), one check is allowed if it does
not extend to the opposite face and
subject to size limit of 1.5 mm in
width and 300 mm in length and their
occurrence does not exceed 10 % of
the parcel or unit of delivery.
9 Splits Not allowed Not allowed Not allowed
10 Sapwood Bright sapwood allowed without limitation.
Medium stained sapwood limited to 1/6 the
surface of the face, and provided their
occurrence does not exceed 5 % of the
pieces. Heavy stained sapwood is not
allowed.
Medium stained sapwood allowed
without limitation.
Bright sapwood or stained sapwood
not restricted.
Allowable machine defects on face
11 Skips Allowed on face and either of the two
edges provided they are light enough to
allow sanding to remove traces of skip
marks. After sanding there should be on
area over 0.75 mm scant. Skip shall
however be limited in size to :
On face : 0.75 mm deep and 150 mm
long.
Allowed on face and either of the two
edges provided they are light enough to
allow sanding to remove traces of skip
marks. After sanding there should be on
area over 0.75 mm scant. Skip shall
however be limited in size to :
On face : 0.75 mm deep and 150 mm
long.
Allowed on face and either of the two
edges provided they are light enough
to allow sanding to remove traces of
skip marks. After sanding there
should be no area over 0.75 mm
scant. Skip shall however be limited in
size to :
On face : 1.5 mm deep and 150 mm
long.
MTIB15TC1042R1
© STANDARDS MALAYSIA 2017 - All rights reserved 16
On edge : 0.75 mm deep and 300 mm long
and their occurrence shall not
exceed 5 % of the parcel or unit
of delivery.
On edge : 0.75 mm deep and 300mm
long and their occurrence
shall not exceed 10 % of the
parcel or unit of delivery.
On edge : 1.5 mm deep and 300 mm
long and their occurrence
shall not exceed 10 % of
the parcel or unit of
delivery.
12 Chipped grain Allowed if occurrence does not exceed 10
% of the surface of the piece in 10 % of the
parcel or unit of delivery.
Allowed if occurrence does not exceed
10 % of the surface of the piece.
No restrictions.
13 Torn grain Allowed if not exceeding 0.75 mm deep
and not impairing the appearance of at
least 90 % of the exposed surface. Their
occurrence shall not exceed 10 % of the
parcel or unit of delivery.
Allowed if not exceeding 0.75 mm deep
and not impairing the appearance of at
least 90 % of the exposed surface. Their
occurrence shall not exceed 10 % of the
parcel or unit of delivery.
Allowed if not exceeding 1.5 mm deep
and not impairing the appearance of
at least 90 % of the exposed
surface. Their occurrence shall not
exceed 10 % of the parcel or unit of
delivery.
14 Raised grain Allowed if sufficiently light to allow removal
by casual sanding.
Allowed if sufficiently light to allow
removal by casual sanding.
Allowed if 1.5 mm deep.
15 Chip marks Allowed if not exceeding 0.4 mm deep and
subject to their occurrence does not
exceed 5 % of the parcel or unit of delivery.
Allowed if not exceeding 0.4 mm deep
and subject to their occurrence does not
exceed 5 % of the parcel or unit of
delivery.
Allowed if not exceeding 0.5 mm deep
and subject to their occurrence does
not exceed 5 % of the parcel or unit of
delivery.
16 Burn marks Not allowed One per piece and not exceeding 3% of
the parcel or unit of delivery.
Allowed, provided non-indented.
17 Cutter marks Even and smooth to touch and not less
than 10 cutter marks per 25 mm.
As in premium grade. As in premium grade.
1) Bow is not applicable to this standard. 2) Compression failure is not applicable to this standard.
MTIB15TC1042R1
17 © STANDARDS MALAYSIA 2017 - All rights reserved
A4 Table A3 provides grading requirements for general mouldings.
Table A3 Grading for general mouldings
Natural characteristic Grade
Premium Standard Utility
Allowable natural characteristics on better face
1 Warp
1.1 Bow1 Not exceeding 38 mm in every 2 130 mm
length. Bow for other lengths in direct
proportion to this requirement.
As in premium grade. As in premium grade.
1.2 Crook (spring) Not exceeding 19 mm in 2 130 mm length
for set length and for random length
allowed within reasonable limit.
As in premium grade. As in premium grade.
1.3 Cup Not exceeding 1.5 mm in every 150 mm
width (nominal.
As in premium grade. As in premium grade.
1.4 Twist Not exceed 4mm deviation from plane in
every 50 mm width in 3 000 mm length.
Twist for other lengths in direct proportion
to this requirement.
As in premium grade. Not exceed 8 mm deviation from plane
in every 50 mm width in 3 000 mm
length. Twist for other lengths in direct
proportion to this requirement.
2 Borer holes
2.1 Pin holes Base on a piece 50 mm wide, the
maximum number of pin holes in the piece
shall not exceed the number of 1 800
mm multiples in each mouldings, i.e., one
Base on a piece 50 mm wide, the
maximum number of pin holes in the
piece shall not exceed the number of 300
mm multiples in each mouldings, i.e., one
Scattered pin holes are allowed
provided they are neither so numerous
nor so grouped as to materially affect
the appearance of the piece.
MTIB15TC1042R1
© STANDARDS MALAYSIA 2017 - All rights reserved 18
pin hole per every 1 800 mm in length, or
one pin hole per 925 cmof surface area.
This is subject to the overall allowance that
only one pin hole is allowed to occur in any
650 mm2 of surface area. Horizontal pin
holes are not allowed.
pin hole per every 300 mm in length, or
six pin hole per 925 cmof surface area.
This is subject to the overall allowance
that only one pin hole is allowed to occur
in any 650 mm2 of surface area. However
up to 5 % of the total number of pieces in
any parcel can include lightly scattered
pin holes without clusters, i.e., not more
than 3 pin hole per 650 mm2 of surface
area. Horizontal pin holes shall be
repaired.
2.2 Shot holes Not allowed Limit shall be on the basis of width and
for every 1 220 mm length supplied. Shot
holes shall be unstained, scattered and
repaired and not occur in more than 20 %
of the pieces.
maximum number
Width @ 1,220 mm
25 mm & below 1 hole
26 mm - 75 mm 2 holes
76 mm - 150 mm 4 holes
153 mm - 300 mm 6 holes
The limits on pieces measuring 2 130 mm
and below but forming part of the random
length parcel supplied, shall be
determined on proportionate basis.
Scattered shot holes, whether stained
or unstained, allowed if plugged or
filled and smooth sanded.
MTIB15TC1042R1
19 © STANDARDS MALAYSIA 2017 - All rights reserved
2.3 Grub or
large borer holes
Not allowed Not allowed Not allowed
4 Resin pockets Not allowed Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface are),
maximum two very small resin pockets
not exceeding 3 mm wide and 50 mm
long in each piece well filled and sanded.
This is subject their occurrence does not
exceed 5 % of the parcel or unit of
delivery.
Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface
are), maximum two medium resin
pockets not exceeding 3 mm wide and
200 mm long in each piece well filled
and sanded. This is subject their
occurrence does not exceed 10 % of
the parcel or unit of delivery.
5 Knots
5.1 Sound knots Maximum 2 smooth machined knots, or
their equivalent smaller, the sum of their
diameters not exceeding 1/8 the width to
every length of 2 130 mm supplied.
Maximum 2 smooth machined knots, or
their equivalent smaller, the sum of their
diameters not exceeding 1/4 the width to
every length of 2 130 mm supplied.
Checked knots to be filled and sanded.
Maximum 2 smooth machined knots,
or their equivalent smaller, the sum of
their diameters not exceeding 1/3 the
width to every length of 2 130 mm
supplied. Checked knots to be filled
and sanded.
5.2 Unsound knots Not allowed Not allowed Maximum 2 smooth machined knots,
or their equivalent smaller, the sum of
their diameters not exceeding 1/3 the
width to every length of 2 130 mm
supplied. Checked knots to be filled
and sanded.
6 Compression
failure2 Not allowed Maximum one compression failure to
every 900 mm of length and subject that
no one compression failure shall be
allowed to exceed 1/3 the width of the
piece supplied.
Maximum two compression failure to
every 900mm of length and subject
that no one compression failure shall
be allowed to exceed 1/3 the width of
the piece supplied.
MTIB15TC1042R1
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7 Brittle heart Not allowed Not allowed Allowed in any amount, provided it
does not impair strength.
8 Checks Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface area),
one check is allowed if it does not extend
to the opposite face and subject to size
limit of 0.75 mm in width and 150 mm in
length and their occurrence does not
exceed 5 % of the parcel or unit of delivery.
Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface area),
one check is allowed if it does not extend
to the opposite face and subject to size
limit of 0.75 mm in width and 150 mm in
length and their occurrence does not
exceed 10 % of the parcel or unit of
delivery.
Based on a piece 50 mm by 2 130 mm
(approximately 925 cm2 of surface
area), one check is allowed if it does
not extend to the opposite face and
subject to size limit of 1.5 mm in width
and 300 mm in length and their
occurrence does not exceed 10 % of
the parcel or unit of delivery.
9 Splits Allowed if the length of the split does not
exceed the width of the piece, and their
occurrence does not exceed 5 % of the
parcel or unit of delivery. Splits are not
allowed in cut-to-length items.
Allowed if the length of the split does not
exceed the width of the piece, and their
occurrence does not exceed 10 % of the
parcel or unit of delivery. Splits are not
allowed in cut-to-length items.
Allowed if the length of the split does
not exceed twice the width of the
piece, and their occurrence does not
exceed 10 % of the parcel or unit of
delivery. Splits cannot exceed 1/6 the
length of the piece. Splits are not
allowed in cut-to-length items.
10 Sapwood Bright sapwood allowed without limitation.
Medium stained sapwood limited to 1/6 the
surface of the face, and provided their
occurrence does not exceed 5 % of the
pieces. Heavy stained sapwood is not
allowed.
Medium stained sapwood allowed
without limitation.
Bright sapwood or stained sapwood
not restricted.
Allowable machine defects on face
11 Skips Allowed on face and either of the two
edges provided they are light enough to
allow sanding to remove traces of skip
Allowed on face and either of the two
edges provided they are light enough to
allow sanding to remove traces of skip
Allowed on face and either of the two
edges provided they are light enough
to allow sanding to remove traces of
skip marks. After sanding there
MTIB15TC1042R1
21 © STANDARDS MALAYSIA 2017 - All rights reserved
marks. Skip shall however be limited in
size to :
On face : 0.75 mm deep and 150 mm
long.
On edge : 0.75 mm deep and 300 mm long
and their occurrence shall not
exceed 5 % of the parcel or unit
of delivery.
marks. Skip shall however be limited in
size to :
On face : 0.75 mm deep and 150 mm
long.
On edge : 0.75 mm deep and 300 mm
long and their occurrence
shall not exceed 10 % of the
parcel or unit of delivery.
should be no area over 1.5mm scant.
Skip shall however be limited in size
to :
On face : 1.5 mm deep and 150 mm
long.
On edge : 1.5 mm deep and 300 mm
long and their occurrence
shall not exceed 10 % of
the parcel or unit of
delivery.
12 Chipped grain Allowed if occurrence does not exceed 10
% of the surface of the piece in 10 % of the
parcel or unit of delivery.
Allowed if occurrence does not exceed
10 % of the surface of the piece.
No restrictions.
13 Torn grain Allowed if not exceeding 0.75 mm deep
and not impairing the appearance of at
least 90 % of the exposed surface. Their
occurrence shall not exceed 10 % of the
parcel or unit of delivery.
Allowed if not exceeding 0.75 mm deep
and not impairing the appearance of at
least 90 % of the exposed surface. Their
occurrence shall not exceed 10 % of the
parcel or unit of delivery.
Allowed if not exceeding 1.5 mm deep
and not impairing the appearance of
at least 90 % of the exposed surface.
Their occurrence shall not exceed 10
% of the parcel or unit of delivery.
14 Raised grain Allowed if sufficiently light to allow removal
by casual sanding.
Allowed if sufficiently light to allow
removal by casual sanding.
Allowed if 1.5mm deep.
15 Chip marks Allowed if not exceeding 0.4 mm deep and
subject to their occurrence does not
exceed 5 % of the parcel or unit of delivery.
Allowed if not exceeding 0.4 mm deep
and subject to their occurrence does not
exceed 5 % of the parcel or unit of
delivery.
Allowed if not exceeding 0.75 mm
deep and subject to their occurrence
does not exceed 5 % of the parcel or
unit of delivery.
16 Burn marks In 3 700 mm and longer pieces one per
piece is allowed, but burn marks may not
occur in more than 3 % of the parcel or unit
In 3 700 mm and longer pieces one per
piece is allowed, but burn marks may not
occur in more than 5 % of the parcel or
Allowed, provided non-indented.
MTIB15TC1042R1
© STANDARDS MALAYSIA 2017 - All rights reserved 22
of delivery. Burn marks are not allowed in
lengths shorter than 3 700 mm.
unit of delivery. Burn marks are not
allowed in lengths shorter than
3 700 mm.
17 Cutter marks Even and smooth to touch and not less
than 10 cutter marks per 25 mm.
As in premium grade. As in premium grade.
1) Bow is not applicable to this standard. 2) Compression failure is not applicable to this standard.
MTIB15TC1042R1
23 © STANDARDS MALAYSIA 2017 - All rights reserved
Bibliography
[1] Malaysian Grading Rules for Sawn Hardwood Timber 2009 Edition, Malaysian Timber
Industry Board
[2] Malaysian Grading Rules for Rubberwood, Malaysia
MTIB15TC1042R1
© STANDARDS MALAYSIA 2017 - All rights reserved
Acknowledgements
Members of Technical Committee on Timber
Assoc Prof Dr MohdAriff Jamaluddin (Chairman) UniversitiTeknologi MARA
Ms Nor Shahira Mat Nasir (Secretary) Malaysian Timber Industry Board
(MTIB)
Mejar (B) Ajlan Mohamad/
Mr Mansor Abas
Association of Malaysian
Bumiputera Timber and Furniture
Entrepreneurs
Mr Mohamad Razi Ahmad Construction Industry Development
Board Malaysia
Mr Mohd Rahim Rani/
Mr Ahmad Jalil Jaafar
Forestry Department Peninsular
Malaysia
Dr Gan Kee Seng/
Dr Mohamad Omar Mohamad Khaidzir
Forest Research Institute Malaysia
Mr Mohd Adawi Ton Omar/
Mr Hilmi Awang
Golden Pharos Berhad
Ir Muhammad Azman Jamrus /
Ir Nor Azman Ismail
Jabatan Kerja Raya Malaysia
Ms Rafizah Manshor@Mansor Malayan Adhesives and Chemical
SdnBhd
Mr Rajan Samikannoo/
Ms Sabrina Haji Mawasi
Malaysian Timber Certification
Council
Ms Lau Li Har/ Ms Ong Lay Lee Malaysian Timber Council
Dato’ Chung King Tong/
Ms Pang Suet Kum
Malaysian Wood Industries
Association
Mr Leong Yue Peng/ Mr Kuppusamy Malaysian Wood Moulding and
Joinery Council
Mr Low Kong Wah/ Ms Young Kam Han Malaysian Wood Preserving
Association
Dr Kho Chin Seng/ Ms Annie Ting Sarawak Timber Association
Mr Stephen Chaw Zie Shing Sabah Timber Industries
Association
Mr Nicholas Andrew Lissem/
Mr Awang Mentali Awang Sulaiman
Sarawak Timber Industry
Development Corporation
Mr Wong Kar Wai/
Mr Khoo Chin Leong
Timber Exporter’s Association of
Malaysia
Prof Dr Paridah Md Tahir/
Assoc Prof Dr H’ng Paik San
Universiti Putra Malaysia
Assoc Prof Dr Wan Mohd Nazri Wan Abdul Rahman/
Assoc Prof Dr Nor Yuziah Mohd Yunus
UniversitiTeknologi MARA
MTIB15TC1042R1
© STANDARDS MALAYSIA 2017 - All rights reserved
Members of Working Group on Dressed Timber, Door Jambs and General Mouldings
Assoc Prof Dr H’ng Paik San (Chairman) Universiti Putra Malaysia
Ms Nor Shahira Mat Nasir /
Mr Muhamad Basri Md Daud (Secretary)
Malaysian Timber Industry Board
Dr Sik Hui Shing Forest Research Institure Malaysia
Ms Mahsuri Mat Dris/
Mr Jambari bin Surif/
Mr Mohider bin Mat Saleh
Malaysian Timber Industry Board
Dr Clarence Tan Chiat Lin Malaysian Wood Moulding and
Joinery Council
Dr Adlin Sabrina Muhammad Roseley Universiti Putra Malaysia
Assoc Prof Dr Rohana binti Hassan UniversitiTeknologi MARA