Expanded Metal Lath Association (EMLA)

A recent addition to NAAMM, the Expanded Metal Lath Association provides architects, engineers, contractors and other building design professionals with a wide range of solutions. To obtain more information on ordering or specifying Expanded Metal Lath and Furring, visit the EMLA Directory.

EXPANDED METAL LATH ASSOCIATION (EMLA) DEVELOPS TABLES OF TRANSVERSE LOAD CAPABILITIES FOR LATH & PLASTER IN WALL ASSEMBLIES
The Expand Metal Lath Association (EMLA) of the National Association of Architectural Metals Manufacturers (NAAMM) has run a comprehensive testing program to determine the minimum acceptable load for expanded metal lath for transverse loading with a traditional 3-coat stucco wall system. The third party test results proved these types of wall systems perform exceptionally well in high-wind zone environments. The stucco tests were performed in August, 2011 at Smith-Emery Laboratories in Los Angeles, CA, following the ICC’s – Acceptance Criteria (AC) 191 – Acceptance Criteria for Metal Plaster Bases (Lath) – using Code-Compliant Lath & fasteners, studs, weather-barrier and sheathings. The test frames were constructed in accordance with AC191 and the lath plaster were installed according to ASTM C-1063 – Standard Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster and ASTM C-926 Standard Specification for Application of Portland Cement-Based Plaster. Click here for a summary of the tests and the entire test program.


Technical Publications

  1. Analysis of the Transverse Load Test Results from EMLA Report L-11-1869a per ICC-ES AC191-11

    Analysis of the Transverse Load Test Results from EMLA Report L-11-1869a per ICC-ES AC191-11

    • 2012
    • EMLA L-11-1869a

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    EMLA conducted testing on common metal lath and stucco assemblies to provide baseline data to designers, end-users, and standards organizations. The objective of this report is to analyze this data and provide allowable loads for the tested assemblies.

  2. Transverse Load Test on Stucco Panels

    Transverse Load Test on Stucco Panels

    • 2012
    • EMLA L-11-1869a R1

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    Transverse load tests were performed on 18 stucco wall assemblies with 2.5 (see Report Number L-11-1869a R1) and 3.4 (see Report Number L-11-1869b R1) self-furring expanded metal lath in general accordance with ICC-ES AC191, Acceptance Criteria for Metal Plaster Bases (Lath), effective June, 2009. Both reports present the description of the tests performed, the results of the testing, and the findings. The following EMLA companies participated in the test: Alabama Metal Industries Corp. (AMICO), California Expanded Metal Company (CEMCO) and Clark-Dietrich Building Systems, LLC.

  3. Transverse Load Test on Stucco Panels B

    Transverse Load Test on Stucco Panels B

    • 2012
    • EMLA L-11-1869b R1

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    Transverse load tests were performed on 18 stucco wall assemblies with 2.5 (see Report Number L-11-1869a R1) and 3.4 (see Report Number L-11-1869b R1) self-furring expanded metal lath in general accordance with ICC-ES AC191, Acceptance Criteria for Metal Plaster Bases (Lath), effective June, 2009. Both reports present the description of the tests performed, the results of the testing, and the findings. The following EMLA companies participated in the test: Alabama Metal Industries Corp. (AMICO), California Expanded Metal Company (CEMCO) and Clark-Dietrich Building Systems, LLC.

  4. Guide Specifications For Expanded Metal Lathing and Furring

    Guide Specifications For Expanded Metal Lathing and Furring

    • 2009
    • EMLA 920-09

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    A guide for the specification writer, inspector and contractor, providing detailed information about many metal lath and plaster assemblies. Includes exteriors, partitions, vertical furring, wood studs, control joints, ceilings, fireproofing, and reinforcement of other plaster bases. (EMLA 920-09)

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EMLA members

Current EMLA Division members are listed below.

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