STRUCTURAL ENGINEERS ASSOCIATION OF ARIZONA
Central Chapter Dinner Meeting:
Welded Wire Reinforcement/Engieerred Structural Mesh
The Welded Wire Reinforcement (WWR) is a prefabricated reinforcement consisting of a series of cold-worked steel wires that are resistance-welded together in square or rectangular grids by continuous automatic welders, and is one of the recognized and established forms of concrete reinforcement. Its history dates back to United States patents issued in 1901 (Richardson 2000) covering the production of wires welded with this method. Extensive use was made of WWR in the Empire State Building and World Trade Towers in New York, and the Marina City Towers and Standard Oil Building in Chicago. The interstate highway system was also constructed using an extensive amount of WWR in the 1950s and 1960s, and WWR continues to be used today in many transportation and structural applications. These applications of WWR were driven by the need to execute projects faster and more cost effectively. WWR had been used in many projects in California from precast, tilt-up and cast-in place building construction. The Pacific Park Plaza Condominium is a 30 story concrete building in San Francisco Bay Area where WWR were used for concrete shear reinforcements for beams and columns connections had survived the Loma Prieta Earthquake in 1989, without any form of damage. With the current shortage of labor force, many if not all, had been considering the option to use WWR in lieu of the traditional rebar. Tree Island Steel produces WWR for concrete reinforcement for the construction industries. Our customized solutions will save installation time by eliminating the need to tie rebar lengths, while meeting all building code requirements. The presentation will include some case studies of the past projects, calculations in converting rebar to an equivalent WWR design, specific project applications in building construction, and cost saving analysis. Welded Wire Reinforcement meets ACI 318, ASTM A1064, AASHTO/Caltrans and UL Fire Tests for fire rated construction.
Presented by Jose Mendoza
Jose E. Mendoza, P.E. is the current Technical Sales Manager of Tree Island Steel in Western North America. He is a licensed Civil Engineer in the States of California, Nevada and Arizona. He is a graduate of BS Civil Engineering from the Technological Institute of the Philippines (ABET Accredited) and a Master of Engineering from Polytechnic University of the Philippines. He is also a Registered Civil Engineer in the Philippines. He took a second Master’s Degree in MPA major in Management from California State University East Bay. He served the Concrete Reinforcing Steel Institute (CRSI) for 4 ½ years covering Pacific Southwest Region (CA, NV, AZ, UT, HI). He is the former Division Project Manager / Sr. Field Engineer of Hilti Corporation for about 17 years. He has various experiences from being a construction worker, project engineer, Instructor of Civil Engineering, Sales Engineer and a Technical Manager. He is also a volunteered subject matter expert with the California Board of Professional Engineers in Seismic for Civil PE Exam.
Please join us!