Bookstore

HVAC Duct Construction Standards - Metal and Flexible

Building on a history of duct construction standards nearly 100 years old, the flagship SMACNA HVAC Duct Construction Standard – Metal & Flexible 4th edition represents the state of the art in the sheet metal duct fabrication and installation requirements. Significant changes for the 4th edition include; flat oval tables for positive/negative pressure applications; spray and aerosolized duct sealants; non-fiberglass duct liner applications; added information on spiral duct fittings; updates to duct hanger requirements; flexible duct hanger spacing and support bracing.

System Air Leakage Test Standard

SMACNA has included a procedure for leakage testing of ductwork Since January of 1965. This process like many others has evolved after more research and feedback from the industry led to changes in both the pass/fail criteria and the application of testing. The next major leap forward is this standard. It goes beyond the duct and include procedures for any item included in a forced air system. This standard addresses leakage testing of any portion of, and up to the entire forced air system. It does so in a responsible manner where the pass/fail criterions are based on sound research specific to testing conditions and distributes the responsibility of system performance equitably. The testing process is reliable, practical and based on decades of experience.

Creating the High Performing Contractor

Becoming and remaining a high-performing contractor requires constant focused effort. For leaders aspiring to this level of excellence, the journey is well worth the work.

High-Performing Contractors (HPCs) deliver exceptional performance. They empower their work teams by creating rewarding work environments. They nurture strong, mutually beneficial partnerships with their suppliers, trade partners and subcontractors. They embrace focused technologies that help them deliver greater value to their customers. Above all, they never lose focus on their people as their most strategic asset.

The second edition of Creating the High-Performing Contractor: Proven Practices for the Sheet Metal and HVAC Industry seeks to capture new applications while maintaining the basic, sound principles and proven tools of High-Performing Contracting.

Topics covered in the 2020 manual include:

• High-Performing Leadership
• Planning Your Future
• Employee Focus
• Customer Focus
• Work Processes Management
• Keeping Score
• The High-Performance Assessment Model

Free to members in the SMACNA store.

HVAC Systems - Understanding the Basics

SMACNA's HVAC Systems-Understanding the Basics is a comprehensive non-technical manual written to provide an overview of HVAC systems used in residential, commercial, and institutional buildings. The manual addresses HVAC System Basics, Central Heating and Central Cooling Equipment, Hydronic and Air Distribution Systems, Central HVAC Systems, HVAC System Controls and the components that comprise these systems. This manual can be used for self-study, group training, or reference.

Successful Customer Service Practices for HVAC Service

Successful Customer Service Practices for HVAC Service and Retrofit Contractors provides strategies and procedures to keep a customer for life. It includes information on establishing a customer care culture and working within the "life cycle" of a customer. Prepared under the direction of the Residential Contractors Council Steering Committee, this manual helps identify and evaluate your customer types and effective service policies for each type, as well as the customer service role of each employee. Sample scripts are provided so companies can set procedures and train employees on proper customer interaction and phone etiquette.

Residential Comfort Systems Installation Standards Manual

This revised manual addresses three new areas: Hydronic heating systems, multistory HVAC systems, and residential commissioning. Appendix chapters provide overviews of methods for including crawlspaces in the conditioned space and the HVAC accessories, such as UV lights, zoning, and advanced air filtering methods to enhance indoor environmental quality (IEQ) for occupants. More detailed information and new concepts are induded for earth energy heat exchanger methods for ground source heat pumps. Updated construction code requirements are reflected throughout the range of HVAC system types, along with energy efficiency and sustainable practices. Installation, operation, maintenance, and guidance for residential heating, ventilation and air conditioning systems are also included.
 

Normal Project Duration NECA #5076-04

This document is an update to an original NECA report, which was published in the early 1980's. New data and information were collected and new methods are presented to provide contractors with additional tools to track productivity using the data in this report as a baseline. Excerpts from the original Normal Project Duration report are used throughout this document. Results shown in this document indicate that electrical contractors are performing work using much shorter durations than 20 years ago. Reductions in project durations were achieved by increasing manpower and using new tools and equipment.

Overtime and Productivity in Electrical Const. NECA #5050-04

The difficulties resulting from overtime work might lead many to question the wisdom of using overtime under any circumstances. There do seem to be compelling reasons for adhering closely to the standard work week whenever possible. However, situations do arise in which there is no alternative to working a longer than standard week. In order to assist its membership in managing these situations, NECA has studied the problems associated with overtime work. This publication embodies the significant conclusions produced by the study and where appropriate, offers recommendations for coping with the issues that arise.

Residential Retrofit & Service Operations Management Program

The Residential Retrofit and Service Operations Management Program provides information on the latest methodologies to start up and run a profitable and successful residential and light commercial HVAC service and replacement department. This manual begins with an in-depth look at the financial considerations involved in this special type of work and moves into areas such as sales and operations, marketing methods, and personnel requirements. The appendices include a wealth of sample job descriptions for typical residential/light commercial personnel and very interesting "blog style" case studies offering valuable firsthand contractor advice.

Thermoset FRP Duct Construction Manual

This authoritative manual is one that design engineers, industrial engineering departments, pollution control authorities, fiberglass manufacturers and installation contractors can rely upon for the proper selection, manufacture, and installation of FRP duct systems. The American National Standard (ANSI/SMACNA 011-2017) contains language, tables and details for the construction of hand lay-up, spray-up, and filament-wound FRP ductwork from 30 in. wg negative pressure to 30 in.wg positive pressure. Round Ductwork sizes are expanded to include up to 96 in. diameter. For rectangular ductwork, new duct stiffener tables are added for easier selection. Recognizing the increased popularity of FRP ductwork, this edition is expanded to include commercial/HVAC applications. Supporting this, an underground installation section is added as well as added language on testing and balancing, duct sealing, and duct leakage. Duct hangers and support iinformation have been expanded and organized into a separate chapter which now includes: upper attachments, hanger selection tables, channel (strut) used as trapeze, riser support details, and more. Appendices in this edition cover: extended hanger spacing, general information on safe handling of thermoset fiberglass reinforced plastic duct, and allowable FRP defects.

Architectural Sheet Metal Quality Assurance Guide

Developed to provide guidance in the evaluation of exterior sheet metal building components - roofing systems, exterior walls, flashings, copings, etc. - during initial construction and for ongoing condition assessments and maintenance. The manual can assist owners/operators that may have limited knowledge and experience in the specifics of architectural sheet metal components, specification, fabrication, installation, or evaluation. The manual can also serve as a procedural inspection guide for experienced professionals who review architectural sheet metal systems regularly.

Phenolic Duct Construction Standards

This is the first edition of the SMACNA Phenolic Duct Construction Standards. This American National Standard (ANSI/SMACNA 022-2015) contains instruction, tables and details intended to provide basic phenolic duct fabrication and installation standards to the industry. The standard includes model project specifications, duct performance characteristics, specifications and closures, fittings and connections, reinforcement, hangers and support, accessories, and an inspection checklist. The standard is applicable for ducts up to 80 in. x 80 in. size that operate to 4 in. wg positive pressure class and to 3 in. wg negative pressure class.
 

Energy Systems Analysis and Management

This timely document provides an overview of a variety of energy-related business opportunities for commercial, residential, and institutional buildings. Presents contractors, building owners and operators, facility managers, and system designers with the tools needed to evaluate an existing facility for energy savings potential. Addresses both new construction and retrofits. Includes energy conservation management, the energy audit and energy estimating procedures. HVAC system maintenance and indoor air quality, energy management maintenance and monitoring, energy recovery systems and energy recovery system investment analysis.

HVAC Systems Sound and Vibration Procedural Guide

The HVAC Systems Sound and Vibration Procedural Guide details methods and processes that, when followed, provide repeatable measurement and verification of sound and vibration (S&V) levels, as required by new and emerging building codes. Instrumentation standards, sound measurement procedures, vibration inspection methods, and vibration measurement procedures are included in the guide. Written for trained sound and vibration testing supervisors and technicians, this publication also is a useful aid to assist designers developing project specifications for sound and vibration testing requirements.

Achieving Spatial Coordination Through BIM

This guide is an industry reference for HVAC and MEP contractors who are doing spatial coordination in a BIM environment. This guide addresses how contractors can incorporate leading-edge technologies and workflows into the spatial coordination aspect of their projects. It provides contractors with an outstanding educational resource for their employees who have to make these decisions.

This guide explains:

• How to review, use, and contribute to the many documents that establish the scope of that work.
• How to set up a BIM coordination program in your company.
• How to manage the BIM execution plan.
• BIM technologies for an IT infrastructure.
• Proven best practices for profitably implementing spatial coordination through BIM.
• Evaluating spatial coordination contract language.

HVAC Systems Commissioning Manual

Commissioning is the process of ensuring the HVAC system meets the owner’s operational requirements. This American National Standard, ANSI/SMACNA 014-2013, expands on this and also includes LEED project information, current terminology for commissioning of existing buildings as well as other updates to resources and technologies. The commissioning process works effectively for projects large and small, simple as well as complex and applies to the commercial, industrial and institutional markets. This practical how-to guide is for contractors, owners and engineers interested in learning about commissioning for new buildings and re-commissioning for existing buildings. Separate chapters are devoted to the different levels of commissioning, including basic, comprehensive and critical system commissioning. A thorough explanation of re-commissioning leads one through the preliminary investigation, survey and documentation phase, the design and installation of system modifications and the actual re-commissioning test. The appendix contains a sample HVAC Systems Commissioning Specification, complete from the planning to the final execution stage. Additionally, the topics functional performance testing, operator training, MSDS forms and equipment data sheets and O&M manuals are covered. It also includes sample reports and timesaving pre-start and start-up checklists. Use of these tested and proven sample forms and specification will save hours of valuable time.
 

OSHA Field Inspection Reference Manual

This manual provides detailed information on the duties, responsibilities and procedures associated with the majority of OSHA Inspections conducted by OSHA Compliance Safety and Health Officers (CSHO).

Architectural Sheet Metal Manual

This completely revised publication contains the most comprehensive set of recommended practices available for proper design and installation of custom-fabricated architectural sheet metal including roof drainage system design for scuppers, gutters and downspouts. Features more details in the historical restoration section on skylights, cornices and spires; new moisture and maintenance guide with underlayments; mechanical fasteners and soldering guidance; and enhanced metals selection data. Offers new construction techniques and alternative methods of design and installation reflecting climatic conditions and rainfall rates. An upfront, fast “look-up” key speeds information retrieval. Also covers flashing, metal roofs, copings, gravel-stop fascia. Includes wind uplift pressure test reports confirming superior performance of custom-fabricated metal roofing. Applies to commercial, industrial and residential buildings.
 

HVAC Air Duct Leakage Test Manual

This American National Standard, ANSI/SMACNA 016-2012, covers revised leakage criteria and builds on the proven methods for testing ductwork for air leaks from the first edition. Contains updates to the expected leakage rates for ductwork constructed to the SMACNA HVAC Duct Construction Standards—Metal & Flexible, duct leakage test procedures, recommendations on use of leakage testing, types of test apparatus and test setup and sample leakage analysis. Includes a new educational chapter for designers and specifiers, to aid in the specification and implementation of duct leakage and testing methods.
 

Guide for Free Standing Steel Stack Construction

Contractors, designers, and engineers will find this guide a very valuable resource, as tables containing hundreds of stacks are detailed and ready to go.

This new publication updates the 1996 Guide for Steel Stack Construction, second edition, incorporating text and tables. New to the 2011 publication are design considerations for free standing stacks under resonant vibration, established limits on stacks fitted with testing platforms, larger stack selection diameters, and consideration of custom designed anchoring systems instead of a standardized schedule. Includes tables for selection of free standing stacks from 20 feet to 120 feet high, and diameters to 120 inches, companion flange, stiffener sizes and stacks with access ladders and platforms.
 

Building Systems Analysis and Retrofit Manual

The second edition of the Building Systems Analysis and Retrofit manual provides methods to assess the major energy using elements of an existing building—electrical (lighting and motors) and HVAC. It provides a process that begins with a walk-through audit. Methods discussed include using building systems automation, envelope improvements, and demand control strategies including thermal energy storage. Contractors interested in new opportunities will find market entry guidance and ideas to assist them in the development of new business strategies that target the renovation of existing buildings. Existing buildings are often located near public transportation and development typically occurs on a building’s existing footprint. These two “green” drivers may combine with basic economic factors to produce a compelling incentive for many prospective building owners to choose renovation of an existing building over the construction of new facilities.
 

Personnel Policies and Procedures

Contractors can use this publication to create a personalized policy manual for their firm by modifying or editing the general guidelines and policies included.

This publication clarifies company procedures and expectations that foster healthy management-employee relationships and eliminates confusion and inconsistency. It addresses most of the topics necessary to provide employees a solid understanding of their obligations and opportunities.

This document is free to members in the SMACNA Store.

Right Sizing: The Keys to Profitably Scaling Your Business

In "Right Sizing: The Keys to Profitably Scaling Your Business," the crucial distinction between growth and scale is illuminated. While growth involves adding resources in tandem with revenue, scale emphasizes rapid revenue increase while incrementally managing resources. This book unveils the formula for successful scaling – adding customers while judiciously allocating resources, driving consistent growth and heightened profit margins. The challenges of scaling are explored, from evolving business processes to managing larger teams, while potential pitfalls like operational complexity and customer satisfaction balance are dissected. With insights into adapting leadership styles, pacing expansion, and strategic right-sizing, this book equips contractors to navigate the intricate path of growth and scale while maintaining profitability even amidst market shifts.

This document is free to members in the SMACNA Store.

Guideline to Information Technology

More than 40 percent of construction companies do not have a dedicated information technology (IT) department, according to J.B. Knowledge's recently published Construction Technology Report. For small and medium sized specialty contractors, like most SMACNA members, that percentage is significantly higher. SMACNA's new "Guideline to Information Technology" addresses this gap by providing members with guidance on the proper combination of standardized hardware, software, and connectivity. This easy-to-read, 39-page document also includes two critical appendices: A Sample Disaster Recovery Plan and a Sample Information Technology Policy and Procedures Manual. So, if you're looking for a quick resource guide to navigating IT decision making and management, check out SMACNA's "Guideline to Information Technology".

This document is free to members in the SMACNA Store.

Principles of Job Costing

An effective job costing system helps construction managers and business owners be more successful and profitable. It is also a critical tool for identifying and controlling risk. SMACNA’s updated book “Principles of Job Costing” will provide insight into improving your company’s job costing system.

Properly set up and managed, a job-cost management system will help make a company more profitable with less risk and the ability to grow and manage larger projects.

The updated book includes chapters on system set-up considerations, the estimating system, converting the estimate into an operating budget, progress reporting, change control, work in progress, and cash-flow forecasting. Appendixes include useful samples of general ledger structure, cost code structure, an estimating turnover checklist, and a sample accounts receivables escalation process.

This document is free to members in the SMACNA Store.

Advancing Your Business Negotiation Skills

Advancing Your Business Negotiation Skills is a comprehensive manual that transforms your approach to negotiations. It provides practical guidance and recommended best practices for both pre-contract and post-contract negotiations. Discover strategies to maximize cost savings, strengthen your competitive position, and foster mutually beneficial outcomes. With step-by-step instructions and actionable advice, this manual equips you to navigate various negotiation scenarios with confidence. Unlock the full potential of your business and achieve remarkable results with advanced negotiation skills.

This document is free to members in the SMACNA Store.

SMACNA Partnership

The SMACNA Partnership manual is your comprehensive guide to navigating and thriving in the world of strategic partnerships. In response to economic and labor challenges, many companies are now considering partnerships with other firms, including direct competitors. This manual defines partnerships as close cooperative relationships where parties share specified rights and responsibilities, working together to gain a competitive edge.

The manual covers crucial aspects of partnering, including understanding the short and long-term benefits, identifying and evaluating potential partners, and monitoring partnership performance. Gain insights into the advantages of strategic partnerships and learn effective strategies for finding and assessing compatible partners. With guidance on measuring and tracking partnership performance, this manual equips you with the knowledge and tools needed to create successful collaborations that drive growth and boost competitiveness.

This document is free to members in the SMACNA Store.

Strategic Growth Amid COVID-19

COVID-19 has led to an unprecedented need to help mitigate the spread of the disease, creating huge areas of business growth opportunity for contractors. Properly designed and operating HVAC systems can help reduce the risks associated with virus transmission, and controlling airborne exposure to the virus is one way to mitigate the spread.

Changes to building operations, including the operation of heating, ventilating, and air-conditioning systems, can help reduce airborne exposures. Several areas have been identified as opportunistic by leading contractors including Indoor Air Quality, Outside Air Ventilation, Upgrades to air filtration, Fire and Life Safety, TAB work, preventative maintenance and service contracts, and Equipment replacement.  

This publication explores the areas that industry-leading contractors see as significant strategic business opportunities as a result of COVID-19. Updated July 2021

This document is free to members in the SMACNA Store.

Successfully Managing a Remote Workforce: How to Maintain Productivity and Engagement

In response to the pandemic, many contractors have decided to have their employees work remotely. While there are obvious aspects of construction that require in-person presence on a jobsite, there are many that can be done remotely. Unlike industries where remote work has been being adopted for years, construction has been considered an in-person job. That’s begun to change. Studies have produced research-based practices that managers can implement with minimal effort to improve engagement and productivity. Updated July 2021.

This document is free to members in the SMACNA Store.

Monetary and Nonmonetary Compensation Plans

The primary purpose of this paper is to provide an overview of the monetary and nonmonetary practices used by industry-leading companies. The study has the following specific objectives:

• Illustrate the power of well-defined monetary compensation plans. 
• Identify the types of incentives most useful for kinds of employee groups.
• Connect the incentive programs to performance management.
• Describe the various most popular nonmonetary compensation programs that can impact employee loyalty, retention, and satisfaction.

This document is free to members in the SMACNA Store.

Presentation Skills for Contractors

This update provides guidelines and tools that enable contractors and their employees to become better presenters. In years past, effective presentation skills were considered important only to executives or those in the business development arena. This is no longer the case. The need for strong presentation skills applies to anyone who must present information to another individual or group. Effective presentation skills are now considered a core competency.

This document is free to members in the SMACNA Store.

Navigating Cost-Plus Contracts: Understanding Profit Pockets and Negotiation Strategies

A cost-plus and a fixed-price contract are two types of construction contracts. Both are used frequently when entering into an agreement to build a structure or system. Each has its own special advantages and disadvantages for both the contractor and the buyer. For the sheet metal or HVAC contractor, the choice depends upon the situation, the needs of the client and the risk inherent in the construction.

This document is free to members in the SMACNA Store.

Proven Practices for Conducting Successful Virtual Meetings

This publication covers the importance of foremen meetings to the success of a project. Meetings not only encourage collaboration by bringing stakeholders together, they help hold all parties accountable for on-time project completion. COVID-19 concerns and related safety protocols have mandated the need for increased virtual meetings, bringing the use of new technologies and communications and tracking tools to the forefront of project management. 

With regular meetings critical in construction, firms will continue to look for ways to limit on-site meetings while ensuring access to information, engaging participants and tracking accountability through virtual meetings and other technologies.

This document is free to members in the SMACNA Store.

Maximizing Contractor Bonding Capacity

This publication helps the contractor better understand the bonding process, the different types of bonds and how to maximize bonding capacity within your company. Contractor bonding is becoming increasingly important. Bonds ensure owners that the contractor can deal with any problems and challenges that may arise. Examples of these challenges include labor shortages, material shortages, material delays or cash flow issues.

This document is free to members in the SMACNA Store.

Integrated Project Delivery Guide

This Guide provides an overview of the Integrated Project Delivery (IPD) method from the perspective of sheet metal, HVAC, and mechanical contractors and can serve as a guide for those interested in expanding their market share into healthcare and other IPD market sectors.

IPD is found at the intersection of quality, cost and scheduling on a construction project where project teams, systems, business structures, and practices are all working collaboratively and tapping into the talents and insights of all team members in an effort to optimize efficiencies and reduce redundancies or waste throughout the construction life cycle (e.g., design, fabrication, installation, etc.).

This document is free to members in the SMACNA Store.

Recruit to Retire Best Practices

Employees are one of a company’s biggest expenses — and also one of its most important assets. Unlike major capital costs (like buildings, machinery, technology, etc.), human capital is volatile. Employees need to understand that a company invests in them with a hiring decision, and that the company wants them to stay until they retire.

In this publication, we explore the influence and impact of the pandemic; generational expectations; the advantages of remote work ; how to lead, communicate and incentivize behavior; the impact of this shift on organizational strategy and culture.

This document is free to members in the SMACNA Store.

Scheduling and Planning: An Essential Guide to Proven Practices

Summarizes proven scheduling and planning processes and introduces practices, concepts and principles that are field-tested and proven to deliver superior results. Free to members in the SMACNA Store.

Improving Shop Workflow and Efficiency

Contractors need to analyze ways to improve their current shop layout before investing in any major expansion. With careful examination, you will often discover there is often more unused space available than you first thought.

This updated manual introduces new fabrication approaches and applications to SMACNA shop fabricators to help them become more competitive. The manual assumes members already have a sheet metal shop in operation, and these guidelines are intended to help increase the effectiveness and efficiency of current shop set ups.

The guidelines may also be applied when designing a shop from scratch, as long as the designer knows the basic sequence of the fabrication process. These guidelines are also useful when expanding an existing shop.

This document is free to members in the SMACNA Store.

Material and Inventory Management Guide

This guide provides member contractors with a resource on purchasing and inventory management systems. Whether simple or complex, these systems are a set of rules for deciding when to purchase materials and services and how much to purchase.

This document is free to members in the SMACNA Store.

Strategies and Tools for Effective Procurement

Explore the importance that procurement has on the success of a construction project. 

Procurement on a construction project can account anywhere from 15% to 70% of a projects direct costs, yet this area is not often given the same weight as managing the risk of construction labor on a project. An effective procurement plan for any contractor should be focused on delivering the right material, at the right time, to the right location for the right price

This document covers the elements of an effective procurement plan, different methods for contracting materials, and tools to  manage that procurement. 

This document is free to members in the SMACNA Store.

Contractors Role in Preconstruction Planning

In the construction industry, project success depends on planning in schedule, cost, design, and other deliverables. That planning includes the organization of the resources (people, equipment, and tooling) and costs (materials and labor) to perform at the right time (scheduling).

The goal of preconstruction planning is to standardize the planning process, leading to predictability in resources, costs, and scheduling for each project.  This manual focuses  on the general processes a contractor must perform to implement preconstruction planning and how to manage a designer and the design aspects of the process. Also covered is the use of technology in preconstruction.

This document is free to members in the SMACNA Store.

Management Succession

This publication guides a firm in creating a formal process for leadership development. It illustrates the ways members can turn this potential crisis into an opportunity while gaining a competitive advantage. This report highlights the benefits of internal management succession, best practices, and outlines a process for effective management succession.

This document is free to members in the SMACNA Store.

Transforming Your Organization for the Future

Transforming Your Organization for the Future takes a hard look at why lean transformation using a “kitting strategy” is a true, long-term, strategic solution to manpower shortages, pricing pressure, and schedule compression.

This addition to the Contractors Operations Manual contains detailed case studies about contractors who have adopted this technique and experienced long-term, meaningful competitive advantages.

Companies that have adopted this strategy have experienced cost savings, labor productivity, increased manufacturing, reduced install times, less field manpower, material savings, improved safety, improved quality, schedule reduction, customer satisfaction, business growth, and opportunity.

This document is free to members in the SMACNA Store.

Construction Contracts: Alternative Delivery Methods

This paper provides a brief overview of alternative delivery methods for construction contracts and can serve as a primer for contractors interested in providing services to their clients outside of the traditional design-bid-build model.

At the beginning of most projects, clients have a strong bargaining position and can dictate the terms of the contracts. Understanding how these different contract models operate right from the outset will allow contractors to decide whether it makes sense to pursue a project, develop the “best” price in a competitive manner, and manage the risk associated with these alternative methods.

This document is free to members in the SMACNA Store.

Establishing Overhead and Burden in a Sheet Metal Business

Sheet metal/HVAC contractors are unique in the construction industry in that they engineer, manufacture and install products made from raw materials. The scope of services provided by sheet metal contracts creates confusion and sometimes conflict with owners and general contractors who may not be familiar with the cost structure of a sheet metal/ HVAC contractor.

The purpose of this document is to detail the various types of expenses incurred by a sheet metal/HVAC contractor in support of a proper determination of overhead and burden rates.

This document is free to members in the SMACNA Store.

Round Industrial Duct Construction Standards

The American National Standard (ANSI/SMACNA 005-2013) expands the scope of the 1999 version, updating the duct materials to include aluminized steel, temperature correction factors for round industrial and minimum decimal thickness for aluminum duct selection tables. Offers a standardized, engineered basis for design and construction of industrial ducts of Classes 1 to 5 air. Includes a spiral duct chapter for Classes 1 and 2 air that covers design pressures ranging from 30 in. wg negative to 50 in. wg positive, plus carbon and galvanized steel tables. Expanded tables for stainless steel and aluminum, expanded tables for duct sizes up to 96 in. diameter, introduction of a new Duct Class 5 for systems handling corrosives and spiral lockseam pipe.
 

Architectural Sheet Metal CADD Drawings

CADD drawings of the illustrations in SMACNA's 7th edition of the Architectural Sheet Metal Manual are available for download and use in CAD programs. These drawings illustrate the best practices in custom architectural sheet metal work. Purchase individual files in DWG format for immediate download or get all 188 figures in DWG format on an individual CD-Rom. Architects and designers are encouraged to use this invaluable resource to assure that their specifications reflect professionally vetted design details.