1、August 2008DEUTSCHE NORM Translation by DIN-Sprachendienst.In case of doubt, the German-language original should be consulted as the authoritative text.English price group 6No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth
2、 Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 91.010.30; 91.080.20!$U6“1501958www.din.deDDIN 18203-3Tolerances in building Part 3: Components of timber and wood-based panel productsToleranzen im Hochbau Teil 3: Bauteile aus Holz und Holzwer
3、kstoffenSupersedesDIN 18203-3:1984-08www.beuth.deDocument comprises 8 pagesDIN 18203-3:2008-08 Foreword This standard has been prepared by Technical Committee NA 042-04-03 AA Toleranzen und Zeichnungen of the Normenausschuss Holzwirtschaft und Mbel (Timber and Furniture Standards Committee). The DIN
4、 18203 standards series Tolerances in building comprises the following: Part 1: Precast ordinary, reinforced and prestressed concrete components Part 2: Prefabricated steel components Part 3: Building components of timber and wood-based panel products Annex A (informative) gives examples of how to a
5、pply this standard. Amendments This standard differs from DIN 18203-3:1984-08 as follows: a) Tolerances and reference moisture contents for solid wood and sections of glued laminated timber have been taken from DIN EN 336 and DIN EN 390. b) Tolerances for wood-based panels, section of glued componen
6、ts, and glued laminated solid timber are now included. c) Flatness tolerances for glued laminated solid timber and glued laminated timber sections are now included. d) Terminology has been harmonized with that in DIN 18202. e) Examples are now included. Previous editions DIN 18203-3: 1984-08 2 DIN 1
7、8203-3:2008-08 1 Scope This standard specifies tolerances for components of timber and wood-based panel products (“panels”, for short) which are used for columns, beams and panels (see DIN 1052) for walls, floors and roofs. The tolerances concerned are manufacturing tolerances. This standard is to b
8、e applied on the basis of DIN 18202. Tolerances and dimensional variations due to shrinkage and swelling of building products of solid wood, glued laminated timber and wood-based panels are specified in DIN EN 336, DIN EN 390, DIN 1052, DIN 4074-1, DIN 68100 and in the wood-based panel product stand
9、ards listed in DIN EN 13986. This standard does not take into account deformations caused by loading or occurring over a long period of time. Such deformations may need to be taken into account additionally. 2 Normative references The following referenced documents are indispensable for the applicat
10、ion of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 18202, Tolerances in building Structures DIN 68100, Tolerance system for wood working and wood processing Concepts
11、, series of tolerances, shrinkage and swelling DIN EN 322, Wood-based panels Determination of moisture content DIN EN 13183-2, Moisture content of a piece of sawn timber Part 2: Estimation by electrical resistance method 3 Terms and definitions For the purposes of this document the terms defined in
12、DIN 18202 as well as the following apply. 3.1 reference moisture content mean moisture content of a cross-section at which the given tolerances are to be met 4 Tolerances 4.1 General The minimum and maximum permitted sizes are to be calculated on the basis of the target sizes and permitted deviation
13、s given in Tables 1 and 2. Any necessary deviations from this standard as regards tolerances and/or specified moisture contents shall be agreed separately. 4.2 Permitted deviations for beams, trusses and columns The permitted deviations specified in Table 1 apply to beams, trusses and columns made f
14、rom converted or round structural timber or wood-based panel products, and to nailed, dowelled, glued or otherwise jointed building components made therefrom. Changes in moisture content lead to changes in size. Such changes are to be taken into consideration in design. Values for changes in size du
15、e to shrinkage and swelling are given in DIN 68100 for the most common types of timber. 3 DIN 18203-3:2008-08 Table 1 Permitted deviations for beams, trusses and columns Permitted deviations in mm for target sizes in m Line Beams, trusses, columns Reference moisture content up to 0,10 over 0,10up to
16、 0,40over 0,40 up to 0,80 over 0,80 up to 2,00 over 2,00 up to 6,00 over 6,00 up to 20,00 over 20,00 1 rough +3 1a+4 2a 2 of solid timber planed, levelled 20 % 1b 1,5b 3 of wood-based panels 10 % 1b 1,5b 4 of sections of glued components 20 % as for solid timber +5 2 +6 3 +8 4 5 of glued laminated s
17、olid timber 15 % 1b 1,5b width 2c6 Width and height of glued laminated timber sectionsdheight 12 % +4 2c+1 % 0,5 % 7 Lengths and spacings (e.g. hole spacings) See lines 1 to 6 2c 0,1 %c 20caCorresponds to tolerance class 1 as in DIN EN 336:2003-09. bCorresponds to tolerance class 2 as in DIN EN 336:
18、2003-09.cAs in DIN EN 390:1995-03. dIncreasingly, glued laminated timber components are used flat (e.g. as in glulam decks or bridge beams). The height is measured normal to and the width parallel to the joints between lamellas.4.3 Permitted deviations for wall, floor, and roof panels The permitted
19、deviations specified in Table 2 apply to the width and height (edge length) and thickness of panels (which, if laminated, may consist of different materials) and to openings (e.g. for doors, windows, stairs) in panels. Examples of permitted deviations for a wall panel are given in Annex A. 4 DIN 182
20、03-3:2008-08 Table 2 Permitted deviations for wall, floor, and roof panels Permitted deviations in mm for target sizes in m Line Panels Refer- ence moisture content up to 0,10over 0,10up to 0,40 over 0,40 up to 1,00 over 1,00 1 Width, height (edge length) and openings 2 0,2 % of the target size max.
21、 5 2 Thickness see lines 1 to 6 in Table 1 +2 1 +3 2 +4 2 4.4 Angular deviation 4.4.1 Angular deviations along the length and width of panels Angular deviations in wood panels and openings shall be determined in accordance with DIN 18202. Line 1 of Table 2 applies to position deviations. The target
22、size is the size of the longest arm of the angle under consideration (see Figure 1 Squareness). Key S Position deviation N Target size Figure 1 Determining the squareness of wood panels 4.4.2 Angular deviations along the thickness of wood panels Angular deviations along the thickness of wood panels
23、are to be determined as in DIN 18202. Line 2 of Table 2 applies to permitted deviations (see Figure 2). 5 DIN 18203-3:2008-08 Key S Position deviation N Target size Figure 2 Determining the squareness of edges of wood panels 4.5 Flatness 4.5.1 Longitudinal bow Glued laminated solid timber and glued
24、laminated timber sections max. 4 mm over 2 000 mm. 4.5.2 Transverse bow (cup) Glued laminated solid timber and glued laminated timber sections max. 1/200 of the largest face. 5 Compliance control Compliance with the requirements of this standard shall be checked in accordance with DIN 18202. In addi
25、tion, the wood moisture content shall be determined and, if necessary, the actual sizes shall be converted on the basis of the reference moisture content. Moisture content shall be determined as in DIN EN 13183-2 with the electrode driven in to a depth of no more than 40 mm, while the moisture conte
26、nt of wood-based panels shall be determined as in DIN EN 322. 6 DIN 18203-3:2008-08 Annex (informative) Examples A.1 Examples of permitted deviations for a wall panel Figure A.1 shows examples of permitted deviations for a wall panel. Dimensions in millimetres Figure A.1 Examples of permitted deviat
27、ions for a wall panel 7 DIN 18203-3:2008-08 8 Bibliography DIN 1052, Design of timber structures General rules and rules for buildings DIN 4074-1, Strength grading of wood Part 1: Coniferous sawn timber DIN EN 336, Structural timber Sizes, permitted deviations DIN EN 390, Glued laminated timber Size
28、s Permissible deviations DIN EN 636, Plywood Specifications DIN EN 13353, Solid wood panels (SWP) Requirements DIN EN 13986, Wood-based panels for use in construction Characteristics, evaluation of conformity and marking DIN EN 14080, Timber structures Glued laminated timber and glued laminated soli
29、d timber Requirements DIN EN 14081-1, Timber structures Strength graded structural timber with rectangular cross section Part 1: General requirements DIN EN 14279, Laminated veneer lumber (LVL) Definitions, classification and specifications DIN EN 14374, Timber structures Structural laminated veneer lumber Requirements
