BORG lumber

[Jeff]

What do these markings mean in general on lumber?

SPIB No.2 PRIME and K19 HT

 

[Mike Davis]

Glossary | SPIB | Southern Pine Inspection Bureau

www.spib.org

KD19

Lumber that is kiln-dried to 19% moisture content. (See KD15, kiln-dried, and air dried).

HT is heat treated

SPIB is Southern Pine Inspection Bureau

 

[FlyingRon]

I assume we're talking framing lumber. #2 Prime is the grade. #2 is a specific structural standard:

This is #2

• Grain slope must meet a minimum 1/8-grain slope (the less deviation from straight grain parallel to the edge, the stronger the piece of lumber).
• Boards contain splits no larger than 1.5 times width of board
• Knots may not be larger than 3 1/2"
• One hole is permitted every 2 feet
• May have wane (bark edge) on corners
• More knots and bark edges than #1 grade

The PRIME designation says it's the same strength wise as #2 but has less holes, wane, and skip so it looks nicer.

 

[scsmith42]

Excellent answers guys!

 

[Jim M.]

Good to know, I always thought SPIB at BORGS stood for Splits, Pith, Indentations and Bows