MM-L-736D
National Oak Flooring Manufacturers Association
Flooring Grading Rules for Oak, Pecan, Beech, Birch, Hard Maple.
(Copies of this document are available from www.nofma.org or from the National Oak Flooring Manufacturers
Association, 22 N. Front St., Suite 660, Memphis, TN 38103.)
The Society for Protective Coatings (SSPC)
SSPC-Paint 25
Zinc Oxide, Alkyd, Linseed Oil Primer for Use Over Hand Cleaned Steel Type I and
Type II
(Copies of this document are available from www.sspc.org or from the Society for Protective Coatings, 40 24th
Street, 6th Floor, Pittsburgh, PA 15222-4656.)
3.
REQUIREMENTS
Material.
3.1
3.1.1
Hardwood lumber. Type I and type II lumber shall be of the species and grade specified (see 6.2)
and shall conform to the National Hardwood Lumber Association (NHLA) Rules for the Measurement and
Inspection of Hardwood and Cypress Lumber.
3.1.2
Hardwood flooring. Type III lumber shall be of the species and grade specified (see 6.2), and shall
conform to the following grading rules as applicable:
(a) National Oak Flooring Manufacturers Association.
(b) Maple Flooring Manufacturers Association.
Sizes. Sizes shall be as specified (see 6.2) and shall conform to the grading rules cited.
3.2
3.2.1
Length trimming. "construction" and "Utility" boards, "Finish" and "Number 1" and "Number 2
Dimension" shall be trimmed to a length not over 3 inches in excess of nominal provided; however, such
trimming shall permit trimming to nominal length.
3.3 Unless otherwise specified (see 6.2), the degree of seasoning shall conform to the following requirements.
Lumber not required to be seasoned shall be designated, "Any stage of seasoning". Moisture content of lumber
shall be determined as specified in 4.3.4.
Type I and NHLA "A" and "B" finish grades of type II lumber. No piece of lumber 8/4 inches or less
3.3.1
in thickness shall have a moisture content exceeding 12 percent. The moisture content of limber over 8/4 inches
in thickness shall be specified (see 6.2). The lumber shall be graded and measured under NHLA "Standard Kiln
Dried Rule" with inspection after surfacing when surfacing is required (see 3.5).
3
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