Blade runner Bandsaw Mill

Operated by Ray & Hilary tinkling

Parksville, British columbia, canada

Phone:  (250)248-9565
R.T. Excavating Ltd

 

   

Glossary

 

GLOSSARY OF SOFTWOOD LUMBER GRADING SCHEME

Rough Lumber Sawn, trimmed, and edged, but the faces are rough show saw marks.  
Surfaced Lumber Rough lumber that has been smoothed by a surfacing machine.  Sub-categories are based on the number of sides and edges that have been smoothed.
  • S1S - Surfaced 1 Side
  • S1E - Surfaced 1 Edge 
  • S2S - Surfaced 2 Sides
  • S4S - Surfaced 4 Sides                                     
Worked Lumber Surfaced lumber that has been matched, patterned, ship lapped or any combination thereof.  

 
Shop and Factory Lumber This is millwork lumber used for applications such as molding, door jambs, and window frames.  
Yard Lumber Lumber used for house framing, concrete forms, and sheathing.  It is also known as structural lumber.  
Board foot
  • 1 board foot = 144 cubic inches
  • Board feet = thickness (in) x face width (in) x length (in)/144   or
  • Board feet = thickness (in) x face width (in) x length (ft)/12

Quick approximations for calculating board feet

  • 1 x 4 - divide linear length (ft) by 3
  • 1 x 6 -divide linear length (ft) by 2
  • 1 x 8 - divide linear length (ft) by 0.66
  • 1 x 12 - linear length = board feet
  • 2 x 4 - multiply linear length (ft) by 0.66
  • 2 x 6 - linear length (ft)  = board feet
  • 2 x 8 - multiply linear length (ft) by 1.33
  • 2 x 12 -multiply linear length (ft) by 2
Boards Lumber must be no more than 1 inch thick and 4 to 12 inches wide.  
Planks Lumber  must be over 1 inch thick and more than 6 inches wide.  
Timbers Lumber width and thickness must be greater than 5 inches  
Softwood lumber grades The most common softwood grading system places lumber into three main categories.

The following descriptions cover the primary system only, see a grading manual for more detail.

 

1.   Select and Finish Materials- "Appearance" grades
  • Select grades - based on best face
  • Finish grades - based on the best face and 2 edges
2.    Boards - 5 grades -
  • Select merchantable - best
  • Construction
  • Standard
  • Utility
  • Economy - worst
3.    Dimensional Lumber- Light Framing

General framing and stud walls. Up to 4 inches wide.

  • Construction (34% Bending Strength Ratio)
  • Standard (34% Bending Strength Ratio)
  Structural Light Framing

Suitable for higher stress applications such as rook trusses and concrete forms.  Up to 4 inch wide.

  • Select Structural (67% 34% Bending Strength Ratio)
  • No. 1 (55% Bending Strength Ratio)
  • No.2 (45% Bending Strength Ratio)
  • No. 3 (26% Bending Strength Ratio)
  Studs

Load bearing and stud walls of 2 x 4 and 2 x 6 construction.  Lengths are  less than 10 feet.

  • stud grade - 26%  Bending Strength Ratio)
  Structural Joists and Planks

Roof rafters, ceiling and floor joists.  5 inch and wider.

  • Select structural (65% Bending Strength Ratio)
  • Grades the same as structural light framing
  Timber Heavy beam support and floor and ceiling supports.
  Appearance framing High bend strength ratio over 2 inch wide, and good appearance for special applications

55% Bending Strength Ratio

Note :    Grading is not an exact science - a maximum of 5% variation is allowable between graders.  These notes  represent a small portion of the Standard Grading rules for Canadian Lumber as published by the National Lumber Grades Authority.

P.O. Box 1342,  PARKSVILLE, B.C.  V9P 2H3   CANADA

    Phone:  (250)248-9565

    Toll Free: 1(888)248-9565

     Questions? Quotes? Email or phone RAY AND HILARY