Fastener Testing, Evaluation and Certifiction

Fastener Testing

NTA understands that fasteners are a crucial part of design, especially in extreme climate areas such as hurricane or earthquake zones. In any design however, their strength can often determine the viability of a project.

The International Residential Code, as well as International Building Code, specifies the requirements for the types of fasteners that can be used in either treated or non-treated wood construction. Whether you are concerned about bending strength, corrosion, resistance or shear, NTA can provide the certification necessary to show the code compliance of your product.

Accredited Fastener Testing

NTA has a nationally recognized test lab, which is accredited by the IAS (International Accreditation Service), that performs a variety of fastener testing to certify code compliance.

The NTA fastener certification program includes:

  • Mechanical testing in wood and plastic lumber
  • Nails, staples, screws, lag bolts
  • Bending strength and stiffness
  • Fastener withdraw
  • Fastener pull through
  • Lateral resistance
  • Sample prep and lumber conditioning
  • Bolted and Timber connection joints
  • Plate type connector joints
  • Joist hanger

Our lab conducts tests according to several ASTM methods:

  • ASTM D1761: Standard Test Methods for Mechanical Fasteners in Wood
  • ASTM E489: Standard Test Method for Tensile Strength Properties of Metal Connector Plates
  • ASTM E767: Standard Test Method for Shear Strength Properties of Metal Connector Plates
  • ASTM F1575: Standard Test Method for Determining Bending Yield Moment of Nails
  • TPI 1: National Design Standard for Metal Plate Connected Wood Truss Construction
  • CSA S347-14 - Method of Test for Evaluation of Truss Plates Used in Lumber Joints
  • ICC—ES AC13 Joist Hangers and Similar Devices

For more information about Fastener Testing, contact us.


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