Table of Contents

**Longleaf pine wood**

**Other names:**A wood of the Southern pine genera.**Scientific name:***Pinus palustris***Genera:**PinaceaeGrowing Longleaf pine stretches from the eastern area of North Carolina to Florida, which is at the south and to the west of the eastern region of Texas.**Places where these trees are found**:

**Physical properties of Longleaf pine wood**

**Color of the wood:** The Sapwood is yellowish-white, the heartwood is reddish-brown.

**Structure of wood:** Similar to Shortleaf, Loblolly, and Slash pine.

**Shrinkage:** Moderately highly shrinkable. To reach the zero humidity state from the green condition, the radial, tangential, and total volumetric shrinkage is 5.1%, 7.5%, and 12.2%, respectively.

**Workability:** Easy and convenient.

**Weight, density, and specific gravity:** The specific gravity is 0.54 (density 553 kg per cubic meter) based on the volume of the green condition and weight in the zero humidity. In 12% humidity, the specific gravity becomes 0.59 (density 604 kg per cubic meter) based on the volume and weight in the zero humidity state.0.54 (density 553 kg per cubic meter), in the 12% humidity state based on the volume and weight in the zero humidity state, the specific gravity becomes 0.59 (density 604 kg per cubic meter).

**Moisture at the green condition:** 31% In the heartwood and 106% moisture is present in the sapwood.

**Natural durability:** The heartwood is moderately sustainable, but the sapwood is not sustainable.

**Seasoning property:** In the high temperature, in the fault state, at a moderate speed, this wood is dried.

**Treatability:** The Sapwood is preservable in the pressure process, but the heartwood is not preservable.

### Mechanical properties of Longleaf pine wood

**Modulus of rupture:** In green condition, the modulus of rupture is 58.62 Newton per square millimeter (8500 lb per square inch). In the standard of IEB, this value is 55.17 Newton per square millimeter.

**Modulus of elasticity:** In green condition, the modulus of elasticity is 0.0109 million Newton per square millimeter (1.59 million lb per square inch). In the 12% humidity state, the parameter becomes 0.0136 Newton per square millimeter (1.98 million lb per square inch.

**Work to maximum load:** In green condition, the maximum load is 0.246 kg per cubic centimeter (8.9 lb per square inch). In the 12% humidity state, the parameter becomes 0.327 kg per cubic centimeter (11.8 lb per square inch).

**Impact bending:** In green conditions, the impact bending is 88.9 centimeters (35 inches). In 12% humidity, this parameter becomes 86.36 centimeters (34 inches) in height.

**Compression parallel to grain-maximum crushing strength:** In green condition maximum crushing strength of this wood is 29.79 Newton per square millimeter (4.320 lb per square inch), in the12% humidity state 58.41 Newton per square millimeter (8.470 lb per square inch).

**Compression perpendicular to grain- fiber stress at the proportional limit: **In green condition, the fiber stress at the proportional limit is 3.31 Newton per square millimeter (480 lb per square inch), in 12% humidity, the parameter becomes 6.62 Newton per square millimeter (960 lb per square inch).

**Shear parallel to grain-maximum shearing strength:** In green condition, the maximum shearing strength is 7.17 Newton per square millimeter (1040 lb per square inch). In 12% humidity, the parameter becomes 10.41 Newton per square millimeter (1510 lb per square inch)

**Tension perpendicular to grain-maximum tensile strength:** In green condition, the maximum tensile strength is 2.28 Newton per square millimeter (330 lb per square inch), in 12% humidity, the parameter becomes 3.24 Newton per square millimeter (470 lb per square inch).

**Side hardness-Load perpendicular to grain:** In green condition, the side hardness of the longleaf pine is 267.62 kg (590 lb). In 12% humidity, this parameter becomes 394.63 kg (870 lb).

**Uses of Longleaf pine wood**

Similar to the Slash pine.