Acceptance Criteria for Composite UHPC Panel Systems to Show Compliance with the Building Codes in the USA

  • Mahmut Ekenel (ICC Evaluation Services LLC)
  • George Quercia (TAKTL LLC)


Currently, all fifty states and Washington, DC in the USA have adopted the International Building Code (IBC) as the model building code. However, the IBC does not include requirements addressing testing and determination of structural capacities, reliability, durability, and serviceability for composite, ultra-high performance concrete (UHPC) panel systems. IBC Section 104.11 states that supporting data, where necessary to assist in the approval of materials or assemblies not specifically provided for in the code, must consist of valid research reports from approved sources. Therefore, Acceptance Criteria for Composite, Ultra-High Performance Concrete (UHPC) Panel Systems (AC493) was published to provide requirements to qualify use of UHPC composite panels under the building codes in the USA, including structural strength and compatibility, fire safety, and material durability. The UHPC panels considered under AC493 are factory-fabricated, composite UHPC panels that are mechanically attached to the wall framing or sub-frame assembly with post-installed connectors that are either undercut anchors, or mechanical fasteners through the face of the panel. This paper explains how composite UHPC panel systems are qualified under AC493 as being in compliance with the IBC.

Keywords: UHPC, International Building Code, interior wall panel, façade panels, Building code compliance

How to Cite:

Ekenel, M. & Quercia, G., (2019) “Acceptance Criteria for Composite UHPC Panel Systems to Show Compliance with the Building Codes in the USA”, International Interactive Symposium on Ultra-High Performance Concrete 2(1). doi:

Download PDF
View PDF



Published on
01 Jun 2019