Narra

Common Name(s): Narra, Amboyna (burl) Scientific Name: Pterocarpus indicus Distribution: Southeast Asia Tree Size: 65-100 ft (20-30 m) tall, 3-5 ft (1-1.5 m) trunk diameter Average Dried Weight: 41 lbs/ft3 (655 kg/m3) Specific Gravity (Basic, 12% MC): .54, .66 Janka Hardness: 1,260 lbf (5,620 N) Modulus of Rupture: 13,970 lbf/in2 (96.3 MPa) Elastic Modulus: 1,724,000 lbf/in2 (11.89 GPa) Crushing Strength: 8,270 lbf/in2 (57.0 MPa) Shrinkage: Radial: 2.8%, Tangential: 4.0%, Volumetric: 6.9%, T/R Ratio: 1.4 Color/Appearance: Heartwood can vary widely in color, ranging from a golden yellow to a reddish brown. Pale yellow sapwood is clearly demarcated from the heartwood. Quartersawn surfaces display ribbon-stripe figure, and the wood is also seen with mottled, beeswing, or curly figure. Narra burl is full of well-defined knot clusters, and the highly valued wood is known as Amboyna. Grain/Texture: Grain is usually interlocked, and can sometimes be wavy. With an uneven medium to coarse texture with good natural luster. Endgrain: Semi-ring-porous; solitary and radial multiples and clusters; very large pores grading down to large/medium pores, very few; mineral/gum deposits (reddish brown) common; parenchyma vasicentric, winged, confluent, and banded; narrow rays, spacing fairly close. Rot Resistance: Narra has good weathering characteristics and is typically very durable regarding decay resistance. It … Continue reading Narra