Standard grading rules for canadian lumber published by the national lumber grades authority nlga of canada. It remains the industry standard and is also accepted in the united states canadas biggest lumber importer. Any canadian lumber species covered by the nlga grading rules except for norway spruce in canada and norway spruce, red alder and white birch in the u. Mechanical properties of canadian coastal douglasfir and hemfir. The membership of nlga consists of all the lumber manufacturers associations and independent grading agencies in canada. The text uses terminology that is not commonly used in the uk market, however to maintain the accuracy of the information we have not made any changes. Bridge timbers and lumber material standard government of b. Grading rule establishes standard lumber grades and grade. Us product standard ps 2010 american softwood lumber standard 2.
Nlga is the only recognized rules writing body for lumber grades and standards in canada. Lumber inspection bureau, and western wood products association. The january 2014 edition of the nlga standard grading rules for canadian lumber is now available in pdf formatted sections. Allowable stress ratings are published for each grade, and vary by species or species mix, as are evidenced in span tables. Nlga standard grading rules for canadian lumber 2007. Learning to grade softwood dimension lumber spib blog. Douglas fir growing west of the cascade crest to the pacific ocean in the states of washington, oregon, and northern california is known as coastal douglas fir. Standard grading rules for canadian lumber national lumber. Canadian lumber standards accreditation board clsab. The national grading rule establishes standard lumber grades and grade names, assuring users of uniform design and performance for all commercial species of dimension lumber. Plib, wclib and wwpa are also accredited by the canadian lumber standards accreditation board to provide grading inspection services under the standard grading rules for canadian lumber published by the national lumber grades authority nlga of canada. Please use the below form to select the lumber grading publications you would like to order.
National lumber grades authority standard grading rules for canadian lumber nlga interpretations the limiting provisions of the nlga rules are quite speci. The nlga rule is approved and enforced by the canadian lumber sant dadrs acceroadtin bti oard clsab and by the amcean lir umbe r. Lumber was graded based on the national lumber grades authority green lumber visual grading rules nlga 1996. Please note that, effective march 1, 2019, supplements to the nlga standard grading rules have been posted on this website under publications updates. Additionally, the grade rules were developed with random width and length lumber in. Grading means that each piece of lumber is visually inspected and a grade is assigned via a grade mark or stamp depending on a number of characteristics such as slope of grain, size and.
Easily share your publications and get them in front of issuus millions of monthly readers. National lumber grades authority a canadian agency, northeastern lumber manufacturers association, northern softwood lumber bureau, redwood inspection service, southern pine inspection bureau, west coast lumber inspection bureau, and western wood products association. V6e 2e9, canada a canadian agency nlga copies of these grading rules may be obtained from the respective grading rule agencies. Lumber dimension lumber the canadian wood council cwc. Sep 16, 2018 the following information in reproduced exactly as it is printed in the book nlga national lumber grades authority standard grading rules for canadian. In contrast most export markets are more familiar with a metric standard. National lumber grades authority standard grading rules for canadian lumber nlga interpretations the limiting provisions of. Each piece of lumber is assigned a grade based on its quality, using a rule. Publications for download national lumber grades authority. Jan 09, 2015 easily share your publications and get them in front of issuus millions of monthly readers. All grades, except economy grade, are stress graded, that is, fifth percentile. Nlga is responsible for the establishment of canadian lumber grading rules and standards and publishes the ngr in the nlga standard grading rules. Nlga national lumber grades authority canada acronymfinder. National lumber grades authority suite 303 409 granville st vancouver, bc canada v6c 1t2.
The specified strengths and modulus of elasticity of visually graded dimension lumber are based on lumber that is graded in accordance with nlga standard grading rules for canadian lumber. Wclib western wood products association wwpa national lumber grades authority nlga independent agencies california lumber. The origins of grading rules 1922 secretary of commerce responds to request from lumber industry for simplification, standardization, and qa 1924 r 16 lumber american lumber standards for softwood lumber 1969 doc vps ps 2070 american softwood lumber standard current standard ps 2099 voluntary product standard ps 2099. Lumber grade rules payment page pacific lumber inspection.
Lumber grading rules spib southern pine inspection bureau. Grade marking 1 lumber for joists, rafters, trusses and beams and for the uses listed in table 9. It has no tight knots that exceed 25% of the cross section and that are spaced closer than 150 mm 6 in. When grading rough sawn lumber, defects such as checks, stain, and warp are not considered if they will surface out at standard surfaced thickness s2s. When grading rough sawn lumber, defects such as checks, stain, and. For orders over 30 books total or if you would like to use a different carrier for your shipment please contact plib directly. We are pleased to provide free pdf sections of the nlga standard grading rules for canadian lumber 2017 edition for your personal reference. Nlga grading rules, which meet the provisions of csa o141 softwood lumber.
Your rules writing agency for southern pine spib blog. The nhla grades are based on the percentage of cleardefect free. The northeastern lumber manufacturers association nelma is the major rules writing association in the northeastern united states. In 1970 the national lumber grades authority nlga published standard grading rules for all canadian lumber. Canadian lumber standards accreditation board clsab and by the american lumber. National design specification design values for wood. The timber was graded by a senior grading supervisor from the canadian mill services association based on the nlga standard grading rules. Any canadian lumber species covered by the nlga grading rules except for red alder and white birch in the u.
Department of commerce voluntary product standard ps 2010. It was prepared to incorporate the 2018 updates to the national grading rule for dimension lumber ngr and the interpretations of the national grading rule for dimension lumber ngr interpretations. In canada, the national lumber grades authority nlga is responsible for the establishment of canadian lumber grading rules and standards and publishes the ngr in the nlga standard grading rules. Remember, all these agencies use the set of standards ps 2099 for grading lumber set by the american lumber. The lumber grader is an integral part of the lumber manufacturing process. Canadian lumber is graded according to standard grading rules for canadian lumber written by the national lumber grades authority nlga. Lumber stress grades and design properties david e. The canadian lumber standards accreditation board clsab approves the nlga rules and accredits the grading agencies in. Nlga standard grading rules for canadian lumber 2017.
Department of commerce voluntary product standard ps 2015. Wclib who write the standard grading rules for west coast lumber, western wood products association wwpa who write the western lumber grading rules, and national lumber grades authority nlga. In contrast, nonstructural wood products are graded solely on the basis of appearance quality and are. The following information in reproduced exactly as it is printed in the book nlga national lumber grades authority standard grading rules for canadian lumber. Nhla grading rules for north american hardwoods gutchess lumber. The national lumber grades authority nlga is the organization responsible for the establishment, issuance, publication, amendment and interpretation of canadian lumber grading rules and standards. On may 19, 1960 the csa created a lumber grade marking division within csa known as the canadian lumber standards committee and appointed an administrative board retroactive to january 1, 1960. Dimension lumber is solid sawn wood that is less than 89 mm 3. The nhla lumber grading rules adopted by the us hardwood industry are based on an imperial measurement system using inches and feet. The national lumber grades authority nlga was incorporated under federal charter on january 12, 1971, as the organization responsible for writing and maintaining canadian lumber grading rules. The text uses terminology that is not commonly used in the uk market, however to maintain the. The design properties of large crosssection members graded to the national lumber grades authority nlga 2005 grading rules for dimension lumber and beam and stringer grades published in.
Multiply the full width of the board by the standard length of the board and divide by 12, rounding to the nearest whole number. The files also include errata and supplements issued since 2004, if applicable. Nlga standard grading rules for canadian lumber provide a list of the permitted characteristics within each grade of dimension lumber. Nlga standard grading rules for canadian lumber provide a list of the permitted characteristics. Canadian softwoods are graded under the national lumber grades authority nlga. Design values for visually graded canadian dimension lumber in canada. Lumber can be referred to by its nominal size in inches, which means the actual size rounded up to the nearest inch or by its actual size in millimeters. The nlga interpretations incorporate the national grading rule ngr for softwood dimension lumber. Plib, wclib and wwpa are also accredited by the canadian lumber standards accreditation board to provide grading inspection services under the standard grading rules for canadian lumber published by the national lumber.
An indepth lumber grading class designed to explain the fundamentals of lumber grading practice to those employed in the production, distribution and use of lumber. Pdf files of sections of the standard grading rules for canadian lumber are listed below. Standard grading rules for canadian lumber published by the national lumber grades authority nlga, suite 105, 401108th. Each piece of lumber was graded before and after lumber drying according to the rules of national lumber grading authority nlga 1996 by a qualified grader from the quebec lumber manufacturers association qlma, and reasons for downgrade were recorded. Standards accreditation board clsab and by the american lumber. The nlga rule is approved and enforced by the canadian lumber. The national grading rule for all north american dimension lumber 2 to 4 thick, as developed by the national grading rule committee, is incorporated into the nlga rule. Nlga standard grading rules for canadian lumber, national lumber grades authority, 960 quayside dr. The design properties of large crosssection members graded to the national lumber grades authority nlga 2005 grading rules for dimension lumber and beam and stringer grades published in the canadian and u. Ucanadian lumber grading manual is a lumber grader training manual. Nlga standard grading rules for canadian lumber 2007 nlga sps 12011 special products standard for fingerjoined structural lumber nlga sps 22010 special products standard for machine graded lumber nlga sps 42011 special products standard for fingerjoined machine gradedlumber nlga sps 62010 special products standard for structural face. Sawn lumber grading agenciesa ruleswriting agencies northeastern lumber manufacturers association.
The grade of a given piece of dimension lumber is based on the visual observations of certain natural characteristics of the wood. National lumber grades authority standard grading rules for canadian lumber nlga interpretations the limiting provisions of the nlga rules are quite specific in delineating the. The result was a national standard for the grading of softwood lumber in house construction. The following information in reproduced exactly as it is printed in the book nlga national lumber grades authority standard grading rules for canadian. For other than the ngr portions of the nlga rules, nlga has prepared interpretations for those portions.
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