b'Poplar H ardwoodI ndustrIes , I nc .GRADE SUMMARY hardwoodind.comH.I. Brand Poplar Sap Content Summary POPLARGrade: Page # Sap 2 Face 100/50+ Sap No Specification Scientific Name: Liriodendron tulipiferaCommon Names: Poplar, Tulip Poplar, Superior Prime 5 X Tulipwood, Yellow PoplarSuperior Plus 6 X Janka Hardness: 540 lbfAverage Dried Weight: 2.42 lbs/BFSuperior H.I. 7 X SAPWOODSuperior H.I. A,3-1/4" - 4-1/4" 8 X The outer, lighter colored wood is the sapwood. This is the "working" Superior H.I. B, 4-1/4" - 5-1/4" 8 X part of the tree, as nourishment Superior H.I. C, 5-1/4" - 6-1/4" 9 X flows through the sapwood.HEARTWOODSuperior H.I. D, 6-1/4" - 7-1/4" 9 X The darker colored wood formed Superior H.I. H, 10" - 12" 10 X when older sapwood "retires", and becomes the strong spine of the tree.Superior H.I. Wide, 12"+ 11 X BURL KNOTSuperior H.I. 1 Face 12 X Not considered a defect if it\'s the same color as the wood.1 & Better Special 13 X STAINThermo Treated Superior H.I. 14 X More prevalent in Poplar, stain is allowed without limit unless Thermo Treated 1 & Better Special 15 X otherwise specified.H.I. Brand White Oak Grades by ThicknessGrade: Page # 4/4 5/4 6/4 8/4 10/4 12/44/4Superior Prime 5 X 15/16"Superior Plus 6 X X X 5/4Superior H.I. 7 X X X X X X 1-3/16" 6/4Superior H.I. A,3-1/4" - 4-1/4" 8 X1-7/16"Superior H.I. B, 4-1/4" - 5-1/4" 8 X8/4Superior H.I. C, 5-1/4" - 6-1/4" 9 XSuperior H.I. D, 6-1/4" - 7-1/4" 9 X 1-15/16"Superior H.I. H, 10" - 12" 10 X 10/4Superior H.I. Wide, 12"+ 11 X 2-7/16"Superior H.I. 1 Face 12 X X X X 12/41 & Better Special 13 X X X X X XThermo Treated Superior H.I. 14 X X 2-15/16"Thermo Treated 1 & Better Special 15 X XH ardwoodI ndustrIes , I nc . www.hardwoodind.com'