june 21, 2013 · amca publication 511-07 (rev.8/08), certified ratings program — product rating...
TRANSCRIPT
SMACNA TESTING & RESEARCH INSTITUTE
HEADQUARTERS: 4201 LAFAYETTE CENTER DRIVE, CHANTILLY, VIRGINIA 20151-1219 MAILING ADDRESS: P.O. BOX 221230, CHANTILLY, VIRGINIA 20153-1230
PHONE (703) 803-2980 FAX (703) 803-3732 www.smacnatri.org
June 21, 2013 Randy A. Acosta, II Sal. J. Acosta Sheet Metal Mfg. Co., Inc. 930 Remillard Court San Jose, CA 95122 Re: Acosta Spiral Seam Elbow Dear Randy,
The SMACNA Testing & Research Institute (STRI) verifies in the attached independent
engineering report the Acosta Spiral Seam Elbow as submitted and tested to be
applicable to the ANSI/SMACNA HVAC Duct Construction Standards, 3rd edition 2006;
Chapter 3 Round, Oval and Flexible Duct when constructed in accordance with the
following requirements of Chapter 3:
Section 3.1 Round Duct Construction Standards
Figure 3-1 thru 3-2 Transverse Joints/Longitudinal Seams
Figure 3-3 thru 3-4M Round Duct Reinforcement/Companion Flange Joints
Table 3-5. 3-5M Round Duct Gage Unreinforced
Table 3-10 thru 3-13M Required Gage for Spiral Seam Duct
Professionally yours, SMACNA Testing & Research Institute
Eli P. Howard, III Executive Director Attachments: Leakage of Spiral Seam Elbows Strength of Spiral Seam Elbows – Collapse Testing
