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This version of the Rectangular Industrial Duct Construction Standards, 2nd edition (2007) is uniquely identified as the SI version (Metric – le Système International d’Unités) to differentiate it from the version published in 2004 as the I-P version (Inch Pound). This latest publication is based on the exact same theoretical work and scope of the earlier I-P version. What differs greatly between the two publications is that in the SI version the data is expressed in metric units and the ratings are based on the use of materials produced under and to ISO standards, in both strength and physical dimensions (we refer to this methodology as Hard Metric). This characteristic makes the information directly usable in the international market.
2007
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Additional Details
These duct construction standards are intended for use by contractors, fabricators and designers of air pollution control,
pneumatic conveyance and industrial ventilation systems.
The 1980 edition of these standards was the first publication dealing with the selection of duct thickness and reinforcement
for rectangular industrial duct systems. While the first edition served industry very well for many years, technology
has continued to evolve and in response to our membership’s request, SMACNA’s Rectangular Industrial Duct
Construction Task Force led a comprehensive review and update of the first edition, resulting in this greatly expanded
and more user friendly" version of the original publication.
While the new text includes many of the same assumptions as the original work, a number of new features have been
added:
New SI version
Six different types of carbon galvanized and aluminized steels
Seven different types of stainless steel alloys
Three different types of aluminum alloys
Consideration of wind, snow, ice, and other loads
Design check for localized and global modes of side panel buckling
Design capability for high temperature systems up to 427°C, and higher with design review by a specialized professional.
New Chapter of practical examples with step−by−step instructions
New Duct Class 5 − for systems handling corrosives
Expanded data for the selection of duct supports, fasteners, gaskets and joint sealants
Accepted Industry Practice for Rectangular Industrial Ducts
New Chapter on Welding
New Guide Specification for the fabrication and installation of industrial duct systems
The Rectangular Industrial Duct Construction Task Force is deeply indebted to Doctor Michael C. Soteriades who did
the original work for the first edition and contributed greatly to the improvements and expansion of the technical scope
in the new edition. Likewise, the task force is deeply indebted to Joseph M Plecnik, PhD, P.E. of California State University
at Long Beach, who is responsible for the physical testing, finite element analysis (FEA) studies, and design
guidance related to the issue of Non−Linear Elastic Buckling of Duct Side Panels on Rectangular Industrial Duct.