One of the most significant changes to the standard is the addition of instructions for mounting a louver test specimen to a test frame using angle iron. While the mounting angle now required would comply with the previous version of the standard, minimum thickness was established to ensure the mounting angle provides a rigid attachment and does not absorb appreciable amounts of impact energy from deformation.

Other changes include:

• The addition of a preface defining broad objectives and uses that do not fit within the purpose and scope sections.
• The establishment of minimum performance requirements for louvers undergoing testing.
• Corrected definitions of enhanced protection and basic protection and added definitions of essential facilities, mullion/section joint, mullion, blade span, unsupported blade span, frameless section joint, and dual-blade louver.
• Definition of the sections of Testing Application Standard (TAS) 203, Criteria for Testing Products Subject to Cyclic Wind Pressure Loading, that are to be followed during post-impact cyclic pressure tests.
• The establishment of separate failed-test procedures for impact tests and cyclic pressure tests.
• The requirement that a test report be signed and sealed by a registered professional engineer and include cyclic-pressure-test data and results.
• The updating of all figures.

The cost of ANSI/AMCA Standard 540-23 is $45 for AMCA members and $90 for non-members in printed or PDF format and $61 for AMCA members and $122 for non-members in both printed and PDF formats. To purchase a copy, click here.

For more information about ANSI/AMCA Standard 540-23, contact Director of Publications and Standards Joe Brooks, PE, at jbrooks@amca.org or Senior Manager, Publications and Standards Shruti Kohli-Bhargava at shrutik@amca.org.

About AMCA International

Air Movement and Control Association (AMCA) International Inc. is a not-for-profit association of manufacturers of fans, dampers, louvers, air curtains, and other air-system components for commercial HVAC, industrial-process, and power-generation applications. With programs such as certified ratings, laboratory accreditation, verification of compliance, and international-standards development, its mission is to advance the knowledge, growth, and integrity of the air-movement-and-control industry.