Oriented Strand Lumber Uses long strands of wood Wide variety of dimensions possible Parallam,...
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Transcript of Oriented Strand Lumber Uses long strands of wood Wide variety of dimensions possible Parallam,...
Oriented Strand Lumber
Uses long strands of wood
Wide variety of dimensions possible
Parallam, 2.3mx1cm softwood veneers
- high-end structural uses
TimberStrand, 30cmx2cm hardwood flakes
- window frames, door stock, wall studs
Ellis
TimberStrand Parallam
Parallam®
Elements: Strips of wooden veneer(1/8-1/10” thick, 1/2” wide, up to 8’ long)
Product Width up to 12 inchesDimensions: Depth up to 21 inches
Length up to 66 feet
Applications: Beams, columns, headers2
Parallel Strand Lumber
Parallam® PSL – production overview
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Parallam®• Veneer clipped into long
strips
• Strips coated with glue and aligned parallel to each other
• Cured by microwave heating
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Parallam® PSL – short strand elimination
Parallam® PSL – strand orientation
wig-wag table
trough
Parallam® PSL – continuous, microwave press
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H J
Laminated Veneer LumberVariability is reducedin one plane.
Parallam®Variability is reducedin two planes.
Solid woodVariability is at its greatest level.
Reduction of natural variability
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Oriented Strand Lumber - Parallam
Trus Joist
Parallam® PSL
Elements: Strands of aspen, cottonwood(1/20” thick, 1” wide, 12” long)
Product Width 1½ -3½ inchesDimensions: Depth 9½-14 inches
Length up to 48 feet
Applications: Beams, wall studs, headers
TimberStrand™
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• Long strands of hardwoods
• Dimensions smaller than Parallam
• Not as strong as Parallam
• Cured by steam pressing
• Very dimensionally stable
TimberStrand™
TimberStrand™ LSL – manufacturing overview
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Steam-injection pressing
Perforated platen
High pressure steam
Mat of strands(unconsolidated)
TimberStrand™ LSL - rimboard
TimberStrand™ LSL - header
TimberStrand™ LSL – stair stringers
TimberStrand™
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TimberStrand™ LSL – light framing
SecondaryWood Products
Furniture
Millwork & Factory-built Housing
Windows & Doors
Cabinets
Wood Products Taxonomy
Engineered WoodProducts
I-Beams
Trusses
CLT
Elements: Flange- MSR lumber, LVL, ParallamWeb - OSB, Plywood
Product Width 1½ -3½ inchesDimensions: Depth 9 ½-24 inches
Length up to 66 feet
Applications: Floor joists, roof joists
I - Beams
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flange
web
Wood I-Beams
Wood I-Beams – manufacturing overview
I - Beams
Trus Joist
I- Beam constitution
FLANGE MSR lumber TimberStrand LVL LVL
WEB OSB OSB Plywood OSB
Wood I-Beams
Flange = MSR lumber Flange = TimberStrand LSLWeb = Plywood Web = Oriented Strandboard
Wood I-Beams
Roof Trusses
small dimension, short lengths of wood combined to
produce large-sized, long length support members
held together with truss plates
often custom-designed using MSR lumber
pitch-chord or parallel-chord
Top chord Web
Truss plateBottom chord
Top chord
Bottom chord
Web
Truss plate
Roof Trusses
Canadian Wood Council
Cross-Laminated Timber
More technical content and images on CLT
• Laminations of selected dimensional lumber.• Each adjacent layer is oriented with grain perpendicular.• Analagous to plywood made from solid wood rather than
veneer.
Cross-Laminated Timber
Structurlam
(Waugh Thistleton Architects)
Cross-Laminated TimberNine-storey residential building (wooden construction)