Structural Assembly Evaluation

Structural Assembly Testing provides a basis for understanding how various building assemblies will continue to perform their intended function under various conditions. Some areas require additional code compliance based on their unique climate, such as hurricane or earthquake prone areas (i.e. the 2010 Florida Building Code, which was developed after Hurricane Andrew, and first implemented in 2001).

CFR 3280 states: “Every structural assembly tested shall be capable of meeting the Proof Load Test or the Ultimate Load Test.” Chapter 17 of the 2015 IBC (International Building Code) for Special Inspections and Tests discusses seismic resistance requirements, materials strength and other important factors necessary to receive certification as a code-compliant structural assembly.

What NTA can do

NTA performs proof load testing as well as many other types of code compliance testing for structural assemblies, often as part of an NTA certification program, such as:

  • Walls
  • Roofs
  • Trusses
  • Floors (cantilevered floor assembly testing)
  • Wind resistance
  • Snow load
  • Proof loads, ultimate loads
  • Verification testing, on-site or in-situ
  • Stiffness

NTA is accredited by International Accreditation Service (IAS) under ISO/IEC 17025 to test structural assemblies. NTA conducts testing according to several different methods, including but not limited to:

  • ASTM D198: Standard Test Methods of Static Tests of Lumber in Structural Sizes
  • ASTM D4761: Standard Test Methods for Mechanical Properties of Lumber and Wood-Base Structural Material
  • ASTM D5206: Standard Test Method for Windload Resistance of Rigid Plastic Siding
  • ASTM D5055: Standard Specification for Establishing and monitoring Structural Capacities of Prefabricated Wood I-Joist
  • ASTM D5456: Standard Specification for Evaluation of Structural Composite Lumber Products
  • ASTM E72: Standard Test Methods of Conducting Strength Tests of Panels for Building Construction
  • ASTM E283: Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen
  • ASTM E330: Standard Test Method for Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by Uniform Static Air Pressure Difference
  • ASTM E331: Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference
  • ASTM E564: Standard Practice for Static Load Test for Shear Resistance of Framed Walls for Buildings
  • ASTM E1592: Standard Test Method for Structural Performance of Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference

For more information about our structural assembly testing services, contact us.

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