INDUSTRY REFERENCE MATERIAL

Definitions

CODE  DESCRIPTION COMMENTS 
     
1" (example)  One Inch Imperial unit of measurement 
     
1' (example)  One Foot   Imperial unit of measurement 
     
2/150X50 (example) Two lengths of 150mm x 50mm timber Two lengths of 150mm x 50mm boards nailed together to make one beam, header or lintel 150mm x 100mm in size. 
     
2/2x6 (example) Tow lengths of 2' x 6' lumber  Two lengths of 2x6 (2inch x 6inch) boards nailed together to make one beam, header or lintel 4x6 in size. 
     
1mm  One millimetre  Metric unit of measurement 
     
1x2 (example) Piece of lumber 1 inch thick x 2 inches wide  When relating to the size of timber /lumber, the thickness is stated before the width if using imperial measurements (feet and inches) but the opposite applies if using the metric system. For example; 2x4 (imperial inches) = 100x50 (metric millimetres) 
     
2x4 (example) Piece of lumber 2 inches thick x 4 inches wide  When relating to the size of timber /lumber, the thickness is stated before the width if using imperial measurements (feet and inches) but the opposite applies if using the metric system. For example; 2x4 (imperial inches) = 100x50 (metric millimetres) 
     
50x25 (example) Piece of lumber 50mm wide x 25mm thick  When relating to the size of timber /lumber, the thickness is stated before the width if using imperial measurements (feet and inches) but the opposite applies if using the metric system. For example; 2x4 (imperial inches) = 100x50 (metric millimetres) 
     
100x50 (example) Piece of lumber 100mm wide x 50mm thick When relating to the size of timber /lumber, the thickness is stated before the width if using imperial measurements (feet and inches) but the opposite applies if using the metric system. For example; 2x4 (imperial inches) = 100x50 (metric millimetres) 
     
Actual Size Actual Size  The finished size as opposed to the nominal size of a piece of wood.  
     
BF  Board foot A form of wood measurement, where one board foot equals the volume of a board 1 inch thick, 12 inches wide, and 12 inches long. A board foot is equal to 144 cubic inches of wood.  FORMULA: (Thickness x Width x Length) / 144 = Board Feet  
     
Bds Boards     
     
Box  Rough grade timber  
     
BT  Boric treated Internal framing   
     
C.F. Chemical free     
     
CD Ply wood.  Defects one side. Filled and sanded one side.   
     
CGL Common Grade Lumber   Lumber with obvious defects  
     
Ctl Cut to length     
     
Clears Timber without Knots     
     
D4S Dressed four sides     
     
DD Ply wood.  Defects both sides   
     
D/G Dressing grade Dressed but a lower grade of timber   
     
F1 Number one framing     
     
F2 Number two framing   
     
FBM Feet, Board, Measure  
     
Fj  Finger jointed     
     
Full Sawn  Lumber cut, in the rough, to its full nominal size.   Also called rough sawn in Australasia. 
     
GL Green Lumber Freshly cut lumber that has not had time to dry. Moisture content in excess of 19%.  
     
H1 Pressure-treated (P/T) Treated for inside use. Dry areas 
     
H2 Pressure-treated (P/T) Treated for outside use, but not in ground 
     
H3 Pressure-treated (P/T) Treated for outside use and in ground 
     
H4 Pressure-treated (P/T) In ground structural applications 
     
H5 Pressure-treated (P/T) In ground structural applications 
     
H6 Pressure-treated (P/T)  Salt water immersion 
     
KD  Kiln-dried     
     
KDAT Kiln dried after treatment Lumber that has been kiln dried to 19% or less moisture content after being pressure treated.  
     
L/F  Lineal (running) foot  A measurement of the length of a board.  
     
L/M  Lineal (running) metre  A measurement of the length of a board.  
     
Lumber Wood  Logs which have been sawn, or sawn and planed, and cut to length.    
     
MDF Medium density fibreboard A special type of tempered hardboard with a fine, smooth finish. MDF is used in cabinet making.  
     
Merch Merchantable.H3, usually fencing     
     
M/G Gauged smooth finish  
     
MSG  Machine stress graded  
     
Nominal Size Nominal Size The rough-sawn size of a piece of lumber. Before the lumber is planed or dressed. The nominal size is usually greater than the actual dimension. e.g.:2 x 4 actually equals 1 1/2" x 3 1/2".  
     
p/p Pre primed      
     
Premium Contains some small tight Knots    
     
P/T Pressure-Treated Lumber Pressure sprayed lumber to lengthen its life expectancy for outside use or inground applications 
     
Rad Radiata Species of pine most commonly used in NZ   
     
Random Mixed lengths, as it comes off the stack     
     
R.L Random lengths     
     
R/S  Rough sawn     
     
Sawn   Rough sawn     
     
SED Small end diameter (for round poles)     
     
Selected Lengths selected to order     
     
Siding  Exterior finish on walls May be made from wood, pressed wood by products, hardboard, vinyl, or metal. 
     
SPF Spruce, Pine, Fir  Indicates that the piece of wood is from the Spruce, Pine, Fir family.  
     
Standard  Contains small and large knots    
     
Veneer A thin sheet of wood cut from a log.     
     
Wane  Wane The presence of bark or lack of wood from any cause on the edge or corner of a piece of wood.  

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