AUTHORIZATION
CONDITIONS OF RELEASE
CONTENTS
INTRODUCTION
SECTION 1 - SCOPE
SECTION 2 - HEALTH AND SAFETY
SECTION 3 - RELATED DOCUMENTS
SECTION 4 - ABBREVIATIONS AND DEFINITIONS
SECTION 5 - RUDIMENTARY TIMBER TECHNOLOGY
Commercial Timbers
Definition of Hardwoods and Softwoods
The Structure of Wood
SECTION 6 - CONVERSION OF TIMBER
Conversion
SECTION 7 - SEASONING
Seasoning
Drying
Moisture extraction
Kiln Seasoning
Other Seasoning Methods
SECTION 8 - DEGRADE IN TIMBER
Degrade in Timber
Natural Defects - knots
Compression and Tension Wood
Brashness
Timber
Wild Grain
Shakes
Pitch Defects
Ingrowing Bark
Stone
Thunder Shakes
Unfavorable Growing Conditions
Fungi, Insects and marine Organisms
Improper Handling
Seasoning Defects
Deterioration of Converted Timbers
Fungal Attack
Insect Attack
Mollusc and Crustacean Damage
Weathering
Mechanical Wear
Electrochemical Decay of Timber
SECTION 9 - PROTECTION OF TIMBER
General
SECTION 10 - FELLING OF TIMBER
General
SECTION 11 - PROCUREMENT OF TIMBER AND PLYWOOD FOR DGST(N)
REQUIREMENTS
General
Softwoods
Grading rules and documents
Size variations - Softwoods
Hardwoods
Converted Timber
Size Variations - Hardwoods
Logs
Timber for structural purposes
Softwoods
Hardwoods
Stress Values
Page Clauses
SECTION 12 - STORAGE OF TIMBER IN NAVAL BASES AND MOD
ESTABLISHMENTS
General
Log Timber
Storage of plank, board and flitch
Building of stacks
Piling Sticks
Drying Rates
Drying Short Lengths of Thick Stock
Moisture Content of Timber for Manufacturing Purposes
Moisture Meters
Storage of Kiln Dried Timber
SECTION 13 - DESCRIPTION OF TIMBER LIKELY TO BE USED FOR
MARINE APPLICATIONS
General
Bending Properties
Mixed species or species groups
Softwood species groups
Hardwood species groups
Source of tabulated properties
SECTION 14 - DESIGN DATA AND AVAILABILITY
General
Mechanical Properties
Ultimate Tensile Strength
Maximum Bending Strength (Equivalent
Fibre Stress at Maximum Load)
Stiffness (Modulus of Elasticity)
Energy Consumed to Total Fracture (Total Work)
Resistance to Suddenly applied Loads
Maximum Compressive Strength
Resistance to Indentation (Hardness)
Shear Strength
Resistance to Splitting (Cleavage)
Effect of Moisture Content on
Mechanical Properties
Durability
The Derivation of Permissible Stresses
Grade Stresses
Stress Grading
Timber Defects
Knots
Slope of Grain
Rate of Growth
Fissures
Wane
Distortion
Resin Pockets and Bark Pockets
Insect Damage
Blue Stain and Sap Stain
Other Defects
Application of permissible stresses
Beams
Struts and Props
General remarks on design work
Selection of timber for good class woodworking
Seasoning
Checks, Shakes and Splits
Sapwood
Boxed Heart and Grain Distortion
Knots
Stain
Dote
Commercial Availability
Softwoods
Hardwoods
Availability (Naval Establishments)
SECTION 15 - USES OF TIMBER
General
Flame retardant treatment
Scarf jointing of plywood
Adhesives for joining timber
SECTION 16 - PLYWOOD
General
Manufacture
Manufacturing defects
Overlaps and gaps
Pleats
Blisters
Hollows and Low Spots
Press Marks
Glue Stains
Percolation
Splits and Cracks
Open Joints
Rough or Irregular Cutting
Twisting of Boards
Plywood for Naval Requirements
MOD (N) Classification
Craft and Boats
Storage
Specification and Selection
Determination of Strength Data
Commercial Availability
Approved Uses of Plywood
ANNEX A - PUBLICATIONS PROVIDING USEFUL INFORMATION
ANNEX B - GLOSSARY OF TERMS RELATING TO TIMBER AND WOODWORK