Aircraft Wood Wheel Chocks

Maple Wooden Wheel Chocks

• Common Name(s): Hard Maple, Sugar Maple, Rock Maple
• Scientific Name: Acer saccharum
• Grows: North Eastern North America
• Average Dried Weight: 44 lbs/ft3 (705 kg/m3)
• Specific Gravity (Basic, 12% MC): .56, .71
• Janka Hardness: 1,450 lbf (6,450 N)
• Modulus of Rupture: 15,800 lbf/in2 (109.0 MPa)
• Elastic Modulus: 1,830,000 lbf/in2 (12.62 GPa)
• Crushing Strength: 7,830 lbf/in2 (54.0 MPa)
• Shrinkage: Radial: 4.8%, Tangential: 9.9%, Volumetric: 14.7%, T/R Ratio: 2.1

White Ash Wooden Wheel Chocks

• Common Name(s): White Ash, American White Ash
• Scientific Name: Fraxinus americana
• Grows: North Eastern North America
• Average Dried Weight: 42 lbs/ft3 (675 kg/m3)
• Specific Gravity (Basic, 12% MC): .55, .67
• Janka Hardness: 1,320 lbf (5,870 N)
• Modulus of Rupture: 15,000 lbf/in2 (103.5 MPa)
• Elastic Modulus: 1,740,000 lbf/in2 (12.00 GPa)
• Crushing Strength: 7,410 lbf/in2 (51.1 MPa)
• Shrinkage: Radial: 4.9%, Tangential: 7.8%, Volumetric: 13.3%, T/R Ratio: 1.6

White Oak Wooden Wheel Chocks

• Common Name(s): White Oak
• Scientific Name: Quercus alba
• Grows: North Eastern North America
• Average Dried Weight: 47 lbs/ft3 (755 kg/m3)
• Janka Hardness: 1,350 lbf (5,990 N)
• Modulus of Rupture: 14,830 lbf/in2 (102.3 MPa)
• Elastic Modulus: 1,762,000 lbf/in2 (12.15 GPa)
• Crushing Strength: 7,370 lbf/in2 (50.8 MPa)
• Shrinkage:Radial: 5.6%, Tangential: 10.5%, Volumetric: 16.3%, T/R Ratio: 1.9

Yellow Birch Wooden Wheel Chocks

• Common Name(s): Yellow Birch
• Scientific Name: Betula alleghaniensis
• Grows: North Eastern North America
• Average Dried Weight: 43 lbs/ft3 (690 kg/m3)
• Specific Gravity (Basic, 12% MC): .55, .69
• Janka Hardness: 1,260 lbf (5,610 N)
• Modulus of Rupture: 16,600 lbf/in2 (114.5 MPa)
• Elastic Modulus: 2,010,000 lbf/in2 (13.86 GPa)
• Crushing Strength: 8,170 lbf/in2 (56.3 MPa)
• Shrinkage: Radial: 7.3%, Tangential: 9.5%, Volumetric: 16.8%, T/R Ratio: 1.3