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with glue) strength variability from one piece of PSL to another is less than in solid-sawn wooden beams. Since wooden construction materials are commonly graded to the lowest 5th percentile of the material's strength curve, PSL has much higher usable values for bending, tension parallel to grain, and compression parallel to grain.
56:
The design strength of PSL is greater than that of sawn lumber as the strands are glued together directionally and under high pressure. This results in a much denser and stronger material. Because knots and other imperfections are randomly dispersed throughout the product (and filled up and fortified
109:
The product is manufactured as a 12-by-12-inch (300 mm Ă— 300 mm) or 12-by-18-inch (300 mm Ă— 460 mm) billet in a rectangular cross-section, which is then typically sawn and trimmed to smaller cross-sectional sizes. The beams are continuously formed, so the length of the
60:
The invention, development, commercialisation and patent of PSL, using timber forest thinnings, dates prior to
Parallam, back to the CSIRO's Division of Chemical and Wood Technology in 1976 and, since September 1977, Repco Ltd, and its subsidiary Repco Research Pty Ltd, in consultation with CSIRO.
75:
It is likely that the
Parallam product, which uses parallel shaved veneers instead of linear crushing to form the parallel fibre structures, was developed from the technology licensed from CSIRO and commercially exploited by Scrimber International as noted in the
72:. The technology licence was subsequently transferred to the then newly formed Scrimber International in 1985 – Scrimber International being a joint venture between the SA Timber Corporation and the SA State Government Insurance Commission.
392:
52:
inch (6.4 mm) and an average length of at least 300 times this least dimension (around 6 ft or 1.8 m). It is a member of the structural composite lumber (SCL) family of engineered wood products.
80:
May 1990 article pages 96–99. The history of the
Scrimber patents found at Google Patents (European), was based upon the Australian Patent Priority claimed from AUPG251683, and expired in 2004,
250:
68:, and is described in a 1980 video produced by CSIRO during the development phase at Repco Research Pty Ltd., and the CSIRO 1986 published book –
42:. It is used for beams, headers, columns, and posts, among other uses. The strands in PSL are clipped veneer elements having a least dimension of not more than
166:, 14, 16 and 18 inches (240, 300, 360, 410 and 460 mm). Typically the beams are made to a maximum length of 60 feet (18 m).
196:
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94:). It is the world's only commercially manufactured and marketed parallel-strand lumber product. PSL can be made from any wood species, but
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390:, Grace, William Granton, "Manufacture of reconsolidated wood products", issued 1986-12-03
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beam is limited only to the maximum length that can be handled and transported. Typical widths are
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is the brand name for the product invented, developed, commercialized and patented by
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Stark, Nicole M.; Cai, Zhiyong; Carll, Charlie G., eds. (2010).
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or 7 inches (89, 133 or 178 mm); typical depths are
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825:
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508:
344:"A structural wood composite from short-rotation plantations"
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469:
412:. Madison, WI: Forest Products Laboratory. pp. 11–21.
883:
106:
are commonly chosen because of their superior strength.
425:"The ABC's of Traditional and Engineered Wood Products"
38:
made from parallel wood strands bonded together with
229:. Country Club Hills, Ill: ICC. 2011. p. 36.
1198:
202:An apartment with an exposed PSL beam and column
251:"ParlInfo - ANSWERS TO QUESTIONS : Repco"
454:
422:
405:
423:Kam-Biron, Michelle; Koch, Lori (Oct 2014).
461:
447:
365:
301:Scrimber: A New Engineering Timber Product
219:
217:
70:Scrimber: A New Engineering Wood Product
18:
341:
314:
190:A beam of PSL installed in an apartment
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13:
64:The product was known by the name
14:
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468:
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226:2012 International Building Code
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183:
171:
708:Oriented structural straw board
416:
399:
380:
359:
335:
308:
292:
267:
243:
1:
366:McCafferty, Phil (May 1990).
342:Culnane, Jeff (Winter 1982).
317:"Scrap Timber Makes Scrimber"
315:Roberts, Peter (1990-04-02).
274:Kerton, Robert (1985-06-01).
207:
7:
322:Australian Financial Review
10:
1238:
1099:Non-timber forest products
723:Structural insulated panel
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980:
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786:
743:
637:
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1064:Destructive distillation
304:. CSIRO Australia. 1986.
178:PSL grain from the side
1084:Green building and wood
16:Form of engineered wood
728:Wood–plastic composite
654:Glued laminated timber
649:Cross-laminated timber
28:Parallel-strand lumber
24:
801:Corrugated fiberboard
703:Oriented strand board
22:
1186:WikiProject Forestry
947:Ramial chipped wood
255:parlinfo.aph.gov.au
864:Cellulosic ethanol
429:Structure Magazine
368:"Reinventing Wood"
25:
1217:MacMillan Bloedel
1194:
1193:
1129:Wood preservation
1074:Engineered bamboo
894:Pyroligneous acid
376:. pp. 96–99.
276:"Scrimber (1985)"
98:, southern pine,
88:MacMillan Bloedel
78:Popular Mechanics
1229:
1184:
1183:
1172:
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1119:Timber recycling
1114:Reclaimed lumber
1104:Natural building
1069:Dry distillation
1023:Split-rail fence
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100:western hemlock
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36:engineered wood
34:) is a form of
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1059:Certified wood
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1089:List of woods
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859:Hemicellulose
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584:Railroad ties
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470:Wood products
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409:Wood Handbook
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104:yellow poplar
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41:
37:
33:
29:
21:
1222:Weyerhaeuser
1173:
1143:
1038:Wooden masts
1008:Dugout canoe
993:Bavin (wood)
942:Black liquor
879:Liquid smoke
629:Utility pole
614:Timber truss
534:Log building
428:
418:
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371:
361:
355:(32): 29–30.
350:
337:
326:. Retrieved
320:
310:
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294:
283:. Retrieved
279:
269:
258:. Retrieved
254:
245:
224:
108:
92:Weyerhaeuser
83:
82:
77:
74:
69:
65:
63:
59:
55:
31:
27:
26:
1139:Woodworking
1124:Wood drying
1109:Papermaking
929:By-products
835:Derivatives
773:Pellet fuel
514:Flitch beam
388:EP0203063A1
96:Douglas fir
23:A PSL block
1201:Categories
981:Historical
962:Wood flour
811:Paperboard
681:Fiberboard
639:Engineered
499:Bressummer
328:2023-03-28
285:2023-03-28
280:CSIROpedia
260:2023-03-28
208:References
1003:Clapboard
972:Woodchips
967:Wood wool
847:Cellulose
842:Birch-tar
796:Cardboard
778:Wood fuel
686:hardboard
589:Reclaimed
554:Panelling
544:Log house
539:Log cabin
1164:Category
1145:Yakisugi
1079:Forestry
1047:See also
988:Axe ties
957:Tall oil
937:Barkdust
919:Wood gas
899:Pine tar
889:Methanol
821:Pulpwood
768:Firewood
751:Charcoal
744:Fuelwood
691:Masonite
619:Treenail
519:Flooring
84:Parallam
66:Scrimber
40:adhesive
1207:Plywood
1175:Commons
1054:Biomass
1028:Tanbark
952:Sawdust
763:Firelog
756:biochar
718:Plywood
676:I-joist
594:Shingle
549:Molding
161:⁄
152:,
147:⁄
133:⁄
124:,
119:⁄
47:⁄
1013:Potash
914:Tannin
874:Lignin
788:Fibers
733:lumber
659:veneer
599:Siding
579:Rafter
574:Purlin
489:Batten
482:timber
478:Lumber
394:
233:
102:, and
1094:Mulch
904:Pitch
826:Rayon
806:Paper
624:Truss
564:Plate
559:Plank
524:Joist
509:Cruck
347:(PDF)
90:(now
869:Dyes
852:nano
816:Pulp
641:wood
609:Stud
604:Sill
569:Post
529:Lath
494:Beam
352:ECOS
231:ISBN
884:Lye
696:MDF
664:LVL
504:CLS
32:PSL
1203::
427:.
370:.
349:.
319:.
278:.
253:.
216:^
154:11
480:/
462:e
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163:8
159:7
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126:5
121:2
117:1
114:+
112:3
49:4
45:1
30:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
