What do these markings mean in general on lumber? SPIB No.2 PRIME and K19 HT
J Jeff New User Jeff Mar 17, 2019 #1 What do these markings mean in general on lumber? SPIB No.2 PRIME and K19 HT
Mike Davis Mike Corporate Member Mar 17, 2019 #2 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
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 Moderator Ron Mar 17, 2019 #3 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.
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.
Jim M. Woody Corporate Member Mar 19, 2019 #5 Good to know, I always thought SPIB at BORGS stood for Splits, Pith, Indentations and Bows