Grips and Fixtures for Tensile, Shear, and Flexural Testing of Wood Specimens

Wood testing grips and fixtures are designed to work with the directional structure and variable density of wood and timber specimens. They cover the full range of mechanical tests used to characterize wood, from tension to bending.

Their designs keep the specimen supported and the load transferred cleanly despite the natural variability of wood. To match a set to your program, request a personal quote.

The range covers the main wood mechanical evaluations:

• Tensile and shear
• Compression
• Nail and screw withdrawal
• Flexural (bending)

One fixture family therefore covers most wood testing needs. Explore the full grips and fixtures range.

They support the common wood mechanical test methods, including:

• ASTM D143 for small clear specimens
• ASTM D4761 for structural lumber

The right fixture depends on the specific property and specimen. See our standards and certification.

The right choice depends on a few things:

• The property, whether tensile, shear, compression, withdrawal, or flexural
• The specimen, from small clear samples to structural lumber
• The standard, such as ASTM D143 or D4761

Those point to the fixtures you need. Email sales@tensilemillcnc.com.

For tensile testing parallel to the grain, flat or serrated jaw grips or shoulder-type clamps hold dogbone specimens without crushing the loaded section. The goal is a secure hold that does not damage the gauge region.

Protecting the loaded section is what keeps the tensile result valid. Learn more about our tensile testing equipment.

For tests perpendicular to the grain, fixtures with bonded support plates keep the specimen stable during loading. This supports the specimen so the load is applied correctly across the grain.

Stable support is essential because wood behaves very differently across the grain. To set up a cross-grain test, request a personal quote.

Flexural properties such as modulus of rupture and modulus of elasticity are measured using 3-point or 4-point bending fixtures. These suit lumber, beams, and engineered wood products.

Bending fixtures give the stiffness and strength data used to grade structural wood. To set up a bending test, request a personal quote.

Block shear fixtures measure shear strength along the grain, under either tension or compression. They hold the block so the shear plane is loaded cleanly.

This is a standard way to characterize how wood resists shear along its grain. Explore the full grips and fixtures range.

Nail and screw withdrawal fixtures apply axial force to fasteners embedded in wood to determine withdrawal resistance. This measures how firmly a fastener holds in the material.

The result supports furniture, construction, and fastener development. To set up a withdrawal test, request a personal quote.

Compression testing uses large-area or self-aligning platens to support uniform load application across the specimen. Even loading is important given the variable density of wood.

Self-aligning platens help keep the load axial on uneven specimens. Learn more about our tensile testing equipment.

Yes. Lumber, beams, and engineered wood products are all within scope, particularly for flexural and structural evaluations. The fixtures account for the variability these products can show.

This makes them suitable for both natural timber and manufactured wood. Explore the full grips and fixtures range.

Their designs help maintain proper specimen support and load transfer while accounting for the density and grain variation typical of natural wood. This keeps results consistent across specimens.

Handling variability well is what makes wood data comparable. Learn more about our tensile testing equipment.

They are used in wood products manufacturing, construction materials testing, and furniture and fastener development. Each of these relies on consistent wood strength data.

The fixtures support that consistency across a naturally variable material. To discuss your program, talk to our team.

You can request a personal quote or order online. Sharing your test properties, specimen sizes, and standards lets us recommend the right fixtures.

For a configuration matched to your testing, request a personal quote.