BS 1186-3:1990

Committees responsible
Foreword
Section 1. General
1.0 Introduction
1.1 Scope
1.2 Definitions
Section 2. Selection of timber species
2.1 Species of timber for end uses
Section 3. Moisture content
3.1 Moisture content
3.2 Measurement of moisture content
Section 4. Quality of timber prior to the wood trim
           being fixed
4.1 Classification
4.2 Knots and knot clusters
4.3 Splits, shakes and checks
4.4 Limits of resin pockets
4.5 Limits of sapwood
4.6 Limits of wane
4.7 Limits on rate of growth of softwood
4.8 Limit on slope of grain
4.9 Limits of exposed pith
4.10 Limits of decay and insect attack
4.11 Laminating and edge jointing
4.12 Finger jointing
4.13 Surface quality
Section 5. Fixing wood trim
5.1 General
5.2 End trimming
5.3 Nailing
5.4 Fixing by screws
Appendices
A Recommendations for specifying timber for wood
      trim
B Some species of softwood and their suitability for
      use as wood trim
C Some species of hardwood and their suitability for
      use as wood trim
D Recommendations for maintaining the moisture
      content of wood trim
E Typical profiles
F Making good at the time of decoration
Tables
1 Requirements for wood based panel products
2 Moisture content limits of solid timber
3 Some species of softwood and their suitability for
      use as wood trim
4 Some species of hardwood and their suitability for
      use as wood trim
Figures
1 Limits of knots and knot clusters for exposed
      surfaces of wood trim
2 Round knot
3 Oval knot
4 Arris knot
5 Splay knot
6 Margin knot
7 Branched knot
8 Knot cluster
9 Examples of the method of measuring the relevant
      dimension of exposed surfaces of wood trim
10 Measurement of rate of growth
11 Cladding
12 Rounded trim
13 Chamfered trim
14 Bevelled trim
15 Half rounded trim
16 Miscellaneous trim

Requirements for the species, moisture content, classification, quality and workmanship of fixings.

This Part of BS 1186 specifies requirements for the timber species, moisture content, classification and quality. It also specifies requirements for the workmanship involved in fixing wood trim.

This Part of BS 1186 applies to wood trim of solid timber or of laminated, finger jointed and edge jointed wood trim that is suitable for use without any decorative finish or with an opaque or non-opaque finish. Reference is made to end trimming which may be necessary at the time of fixing the wood trim, and to making good which may be necessary at the time of decoration.

Appendix A, Appendix D, Appendix E and Appendix F give information and recommendations on the specifying of timber for wood trim, moisture content, typical profiles and making good at the time of decoration respectively.

Appendix B and Appendix C indicate species of softwood and hardwood and their suitability for use as wood trim.

NOTE The titles of the publications referred to in this standard are listed on the inside back cover.