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BS 5268-2:1996 Structural use of timber - Code of practice for permissible stress design, materials and workmanship, 1996
- BRITISH STANDARD [Go to Page]
- Committees responsible for this British�Standard
- Contents
- General [Go to Page]
- Scope
- References
- Definitions [Go to Page]
- British grown timber
- connector
- connector axis
- end joint efficiency
- glued laminated member
- grade stress
- horizontally glued laminated member
- load-sharing system
- member
- permissible stress
- principal member
- steel dowel
- strength class
- structural unit
- target size
- vertically glued laminated member
- Symbols
- Materials
- Design considerations [Go to Page]
- General
- Loading
- Accidental damage (including exceptional snow drift loads)
- Service classes
- Moisture content
- Duration of loading
- Section size
- Load-sharing systems
- Effective cross-section
- Structural members
- Structural frameworks
- Floor and roof boarding
- Timber
- General
- Timber specification
- Species
- Dimensions and geometrical properties
- Grades
- Grade stresses for strength classes and individual species [Go to Page]
- General
- Service class 3 (wet exposure) stresses [Go to Page]
- Softwood combinations of species and visual grade which satisfy the requirements for various stre...
- North American softwood species/grade combinations which satisfy the requirements for various str...
- North American softwood/grade combinations which satisfy the requirements for various strength cl...
- North American softwood species/grade combinations
- Tropical hardwoods which satisfy the requirements for strength classes given in BS�EN 338 when gr...
- Temperate hardwoods which satisfy the requirements for strength classes graded to BS�5756
- Grade stresses and moduli of elasticity for various strength classes: for service classes�1 and�2
- Grade stresses for softwoods graded in accordance with BS 4978: for service classes�1 and�2
- Grade stresses for Canadian softwoods graded in accordance with NLGA rules: for service classes�1...
- Grade stresses for Canadian softwoods graded in accordance with NLGA rules: for service classes�1...
- Grade stresses for USA softwoods graded in accordance with NGRDL rules: for service classes 1 and 2
- Grade stresses for USA softwoods graded in accordance with NGRDL rules: for service classes 1 and 2
- Grade stresses for North American softwoods graded in accordance with North American MSR rules:�f...
- Grade stresses for North American softwoods graded in accordance with North American MSR rules: f...
- Grade stresses for tropical hardwoods graded in accordance with BS�5756 rules: for service classe...
- Grade stresses for temperate hardwoods graded in accordance with BS�5756 rules: for services clas...
- Modification factor
- Additional properties
- Duration of loading [Go to Page]
- Modification factor
- Load-sharing systems
- Flexural members [Go to Page]
- General
- Length and position of bearing [Go to Page]
- Position of end bearing
- Modification factor
- Effective span
- Shear at notched ends [Go to Page]
- Notched beams
- Form factor
- Depth factor
- Deflection and stiffness
- Lateral support [Go to Page]
- Maximum depth to breadth ratios
- Notched beams
- Built-up beams
- Trimmer joists and lintels
- Compression members [Go to Page]
- General
- Size factors
- Effective length [Go to Page]
- Effective length of compression members
- Slenderness ratio
- Members subject to axial compression (without bending)
- Members subject to axial compression and bending
- Notching and drilling
- Spaced columns
- Packs for spaced columns
- Permissible stresses for spaced columns [Go to Page]
- Modification factor
- Compression members in triangulated frameworks
- Tension members [Go to Page]
- General
- Width factor
- Members subject to axial tension and bending
- Glued laminated timber
- General
- Grade stresses for horizontally glued laminated members
- Grade stresses for vertically glued laminated beams
- Glued end joints in glued laminated timber [Go to Page]
- Modification factors
- Modification factors
- Modification factors
- Glued laminated flexural members [Go to Page]
- General
- Camber
- Curved glued laminated beams
- Pitched cambered softwood beams [Go to Page]
- Values of constants for determining radial stresses in pitched cambered softwood�beams
- Glued laminated compression members
- Glued laminated tension members [Go to Page]
- Pitched cambered beam
- Plywood
- General
- Durability
- Dimensions and section properties [Go to Page]
- Section properties of American construction and industrial plywood: sanded
- Section properties of Canadian Douglas fir and softwood plywood: unsanded
- Section properties of Finnish birch plywood: sanded
- Section properties of Finnish birch-faced plywood: sanded
- Section properties of Finnish conifer plywood: sanded
- Section properties of Swedish softwood plywood: unsanded
- Section properties of Swedish softwood plywood: sanded
- Grades
- Grade stresses and moduli
- Flexural members [Go to Page]
- Grade stresses and moduli for service classes�1 and�2 for American plywood: C-D grade Exposure 1
- Grade stresses and moduli for service classes�1 and�2 for American plywood: C-D grade Exposure 1
- Grade stresses and moduli for service classes 1 and 2 for American plywood: C-C. Exterior. Group ...
- Grade stresses and moduli for service classes 1 and 2 for American plywood: A-C and B-C. Exterior...
- Grade stresses and moduli for service classes 1 and 2 for American plywood. Underlayment Exposure...
- Grade stresses and moduli for service classes 1 and 2 for Canadian softwood plywood: select tight...
- Grade stresses and moduli for service classes 1 and 2 for Canadian softwood plywood: select tight...
- Grade stresses and moduli for service classes 1 and 2 for Canadian Douglas fir plywood: select ti...
- Grade stresses and moduli for service classes 1 and 2 for Canadian Douglas fir plywood: select ti...
- Grade stresses and moduli for service classes 1 and 2 for Finnish birch plywood�1.4�mm veneer. Sa...
- Grade stresses and moduli for service classes�1 and�2 for Finnish conifer plywood�1.4�mm veneer. ...
- Grade stresses and moduli for service classes 1 and 2 for Finnish conifer plywood: thick veneer. ...
- Grade stresses and moduli for service classes 1 and 2 for Finnish combi plywood�1.4�mm veneer. Sa...
- Grade stresses and moduli for service classes 1 and 2 for Finnish combi plywood: thick veneer. Sa...
- Grade stresses and moduli for service classes 1 and 2 for Finnish mirror plywood�1.4 mm veneer. S...
- Grade stresses and moduli for service classes 1 and 2 for Finnish twin plywood 1.4�mm veneer. Sanded
- Grade stresses and moduli for service classes 1 and 2 for Swedish softwood plywood: P 30. Spruce....
- Tempered hardboard
- General
- Durability
- Dimensions and section properties
- Grades
- Grade stresses
- Duration of loading
- Flexural members
- Joints
- General [Go to Page]
- Shear stress in the jointed timber
- Joint slip
- Anti-corrosion treatment
- Nailed joints [Go to Page]
- General
- Effective cross-section
- Nail spacing
- Timber-to-timber joints [Go to Page]
- Fastener slip moduli
- Minimum nail spacings
- Basic single shear lateral loads for round wire nails in a timber-to-timber joint
- Basic withdrawal loads per millimetre of pointside penetration for smooth round wire nails driven...
- Steel plate-to-timber joints
- Plywood-to-timber joints
- Tempered hardboard-to-timber joints
- Particleboard-to-timber joints [Go to Page]
- Basic single shear lateral loads for round wire nails in a plywood-to-timber joint
- Basic single shear lateral loads for round wire nails in a tempered hardboard�to�timber joint
- Basic single shear lateral loads for round wire nails in a particleboard�to�timber joint
- Permissible load for a joint
- Screwed joints [Go to Page]
- General
- Effective cross-section
- Screw spacing
- Timber-to-timber joints
- Steel plate-to-timber joints
- Plywood-to-timber joints [Go to Page]
- Basic withdrawal loads per millimetre of pointside penetration for screws turned�at�right angles ...
- Basic single shear lateral loads for screws inserted into pre-drilled holes in a plywood-to-timbe...
- Basic single shear lateral loads for screws inserted into pre-drilled holes in a plywood-to-timbe...
- Basic single shear lateral loads for screws inserted into pre-drilled holes in a plywood-to-timbe...
- Permissible load for a joint
- Bolted and dowelled joints [Go to Page]
- General
- Effective cross-section
- Bolt spacing
- Timber-to-timber joints
- Steel plate-to-timber joints
- Permissible load for a joint
- Steel dowel joints [Go to Page]
- Basic single shear loads for one�4.6 grade steel bolt or dowel in a two-member timber-to-timber j...
- Basic single shear loads for one 4.6 grade steel bolt or dowel in a two-member timber-to-timber j...
- Basic single shear loads for one 4.6 grade steel bolt or dowel in a two-member timber-to-timber j...
- Basic single shear loads for one 4.6 grade steel bolt or dowel in a two-member timber-to-timber j...
- Basic single shear loads for one 4.6 grade steel bolt or dowel in a two-member timber-to-timber j...
- Basic single shear loads for one 4.6 grade steel bolt or dowel in a three-member timber-to-timber...
- Basic single shear loads for one 4.6 grade steel bolt or dowel in a three-member timber-to-timber...
- Basic single shear loads for one 4.6 grade steel bolt or dowel in a three-member timber-to-timber...
- Basic single shear loads for one 4.6 grade steel bolt or dowel in a three-member timber-to-timber...
- Basic single shear loads for one 4.6 grade steel bolt or dowel in a three-member timber-to-timber...
- Basic single shear loads for one 4.6 grade steel bolt or dowel in a three-member timber-to-timber...
- Minimum bolt spacings
- Toothed-plate connector joints [Go to Page]
- General
- Effective cross-section
- Connector spacing [Go to Page]
- End distances for toothed-plate connectors
- Edge distances for toothed-plate connectors
- Spacing modification factor,
- Spacing modification factor, [Go to Page]
- Connector end and edge distances
- Timber-to-timber joints
- Steel plate-to-timber joints
- Permissible load for a joint [Go to Page]
- Basic loads for one toothed-plate connector unit
- Basic loads for one toothed-plate connector unit
- Basic loads for one toothed-plate connector unit
- Unloaded end distance modification factor,
- Loaded end distance modification factor,
- Split-ring connector joints [Go to Page]
- General
- Effective cross-section
- Connector spacing
- Timber-to-timber joints [Go to Page]
- End distances for split-ring and shear-plate connectors
- Edge distances for split-ring and shear-plate connectors
- Spacing modification factor,
- Spacing modification factor,
- Basic loads for one split-ring connector unit
- Permissible load for a joint [Go to Page]
- End distance modification factor,
- Loaded edge distance modification factor,
- Shear-plate connector joints [Go to Page]
- General [Go to Page]
- Dimensions of circular recesses for shear-plate connector units conforming to�BS�1579
- Effective cross-section
- Connector spacing
- Timber-to-timber joints
- Steel plate-to-timber joints
- Permissible load for a joint [Go to Page]
- Limiting values for permissible loads on one shear-plate connector unit
- Glued joints [Go to Page]
- Laterally loaded joints
- Finger joints [Go to Page]
- Characteristic bending strengths
- Minimum finger joint efficiencies required
- Workmanship, inspection and maintenance
- General
- Moisture content [Go to Page]
- General
- Measurement of moisture content
- Machining and preparation [Go to Page]
- General
- Surfaces
- Treatment of cut surfaces
- Marking
- Joints [Go to Page]
- General
- Mechanical joints
- Connectored joints
- Glued joints
- Transportation, storage and handling [Go to Page]
- Protection of unfixed materials and components
- Site storage
- Handling
- Protection of installed materials and components
- Assembly and erection
- Treatments [Go to Page]
- Preservative treatments
- Flame-retardant treatments
- Decorative treatments
- Anti-corrosive treatments
- Inspection
- Maintenance
- Testing
- General
- Testing authority
- Information required
- Quality and manufacture of test structure
- Method of testing [Go to Page]
- General
- Pre-load
- Deflection test
- Strength test for timber and/or plywood structures
- Strength test for partly or wholly tempered hardboard structures
- Strength test for partly or wholly particleboard structures
- Acceptance [Go to Page]
- Deflection of timber and/or plywood structures
- Strength of timber and/or plywood structures
- Deflection of partly or wholly tempered hardboard structures [Go to Page]
- Modification factor
- Strength of partly or wholly tempered hardboard structures
- Deflection of partly or wholly particleboard structures
- Strength of partly or wholly particleboard structures
- Test report
- Use of tested structures
- Wood particleboard
- General
- Durability
- Dimensions and section properties
- Grades and marking
- Grade stresses [Go to Page]
- Section properties of sanded particleboard
- Duration of loading
- Flexural members [Go to Page]
- Concentrated load capacity of type C5 wood particleboard
- Modification factor
- Modification factors
- (normative) Structural timbers [Go to Page]
- (normative) Structural timbers [Go to Page]
- Names and densities of some structural softwoods
- Names and densities of some structural softwoods
- Names and densities of some structural hardwoods
- (normative) Modification factor for compression members [Go to Page]
- (normative) Modification factor for compression members
- (normative) Efficiency ratings of glued end joints in softwoods [Go to Page]
- (normative) Efficiency ratings of glued end joints in softwoods
- (informative) Species of timber used in the manufacture of plywood [Go to Page]
- (informative) Species of timber used in the manufacture of plywood
- American plywood
- Canadian plywood
- Finnish plywood
- Swedish plywood [Go to Page]
- Species used in American C-D and�C-C plywood
- Species used in Canadian plywood
- Species used in Finnish plywood
- (informative) Grade marks for plywood [Go to Page]
- (informative) Grade marks for plywood [Go to Page]
- American construction and industrial plywoods
- Canadian Douglas fir and softwood plywoods
- Finnish birch, birch-faced and conifer plywoods
- Swedish softwood plywood
- (informative) Modulus of elasticity and shear modulus for tempered hardboard [Go to Page]
- (informative) Modulus of elasticity and shear modulus for tempered hardboard
- (informative) Derivation of the basic lateral load-carrying capacities referred to in Section 6 [Go to Page]
- (informative) Derivation of the basic lateral load-carrying capacities referred to in Section 6
- General
- Nailed and screwed joints [Go to Page]
- Diagram indicating the dimensions
- Characteristic density of timber at�12�% moisture content
- Characteristic density of plywood at�12�% moisture content
- Bolted and dowelled joints [Go to Page]
- Bolted/dowelled joints
- Connectored joints
- (normative) Moisture content determination by oven dry method [Go to Page]
- (normative) Moisture content determination by oven dry method
- (informative) Modulus of elasticity and shear modulus for particleboard [Go to Page]
- (informative) Modulus of elasticity and shear modulus for particleboard [Go to Page]