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This Second Edition of the SMACNA commercial metal and flexible duct construction standards is another in a long line dating from the 1950s. A quick overview of the changes is provided in the front of this manual. Meanwhile, a Committee has already begun work on what will be either addenda or a new edition. Subjects being investigated are ribbed round duct, fatigue testing of tie rodded metal, new flat oval duct standards, duct liner pin lengths, more double wall casings, sealant specifications and more performance specifications for joints and reinforcements. And, indirect− ly related to these standards, significant progress is being made by major mechanical code writing agencies in develop− ing one uniform, consensus−supported code for the entire nation.
SMACNA expresses appreciation to the many who have offered suggestions for constructive improvement in the fab− rication and installation of duct systems. Suggestions for future improvement are welcome. Special thanks is given to those who volunteered their time, gave special knowledge and struggled with development of a consensus that would reflect the needs for a diversified industry. Although standardization intrinsically involves selection, no inten− tion of discrimination against the use of any product or method that would serve a designer’s need equally or better exists.
SMACNA expresses appreciation to the many who have offered suggestions for constructive improvement in the fab− rication and installation of duct systems. Suggestions for future improvement are welcome. Special thanks is given to those who volunteered their time, gave special knowledge and struggled with development of a consensus that would reflect the needs for a diversified industry. Although standardization intrinsically involves selection, no inten− tion of discrimination against the use of any product or method that would serve a designer’s need equally or better exists.
Content:-
FOREWORD
HVAC DUCT CONSTRUCTION STANDARDS COMMITTEE
REFERENCES
NOTICE TO USERS OF THIS PUBLICATION
TABLE OF CONTENTS
LIST OF EDITION CHANGES
MODEL PROJECT SPECIFICATION
CHAPTER 1: INTRODUCTION TO BASIC CONSTRUCTION
HVAC DUCT CONSTRUCTION STANDARDS COMMITTEE
REFERENCES
NOTICE TO USERS OF THIS PUBLICATION
TABLE OF CONTENTS
LIST OF EDITION CHANGES
MODEL PROJECT SPECIFICATION
CHAPTER 1: INTRODUCTION TO BASIC CONSTRUCTION
CHAPTER 2: FITTINGS AND OTHER CONSTRUCTION
CHAPTER 3: ROUND, OVAL, AND FLEXIBLE DUCT
CHAPTER 4: HANGERS AND SUPPORTS
CHAPTER 5: EXTERIOR COMPONENTS
CHAPTER 6: EQUIPMENT AND CASINGS
CHAPTER 7: FUNCTIONAL CRITERIA
APPENDICES
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