omc administration, general requirements and specific

Contractors Series: OMC Administration, General

Requirements and Specific AppliancesBased on the Ohio Mechanical Code, OMC

© 2020 Associated Consulting Solutions LLC. All rights reserved. 1

1Copywrite 2020, Associated Consulting Services, LLC

OMC Administration, General Requirements and Specific Appliances

Welcome!

Maybe we can past a screen capture on this screen to show the opening page of the webinar. Maybe I just set up a picture that does this.

Welcome, So glad you chose to be here.

Course rules?how to navigate? chat box? If there are problems?Recording of webinar? Or rebroadcast?



Meet the InstructorGerald C. “Jerry” Flanik

• ICC-Certified Master Code Professional (MCP)

• Holds over 35 various licenses and certifications

• LEED BD+C Accredited Professional

• Certified Floodplain Manager (CFM)

• Adjunct faculty instructor at Lakeland College in the Civil and Electrical Engineering Departments

• Professional consultant for corporations and government agencies throughout the United States, and for the International Code Council throughout the world

• Bachelor of Science Degree in Electrical Engineering, Bachelor of Science Degree in Mechanical Engineering from Cleveland State University and Associates of Science Degree in Civil Engineering Technology from Lakeland Community College

• President of Associated Consulting Solutions, LLC (ACS) in Cleveland, Ohio‣ Provides plan review services ‣ Provides pre and post design analysis services

for architectural and engineering firms throughout the United States

‣ Is an ICC Preferred Education Provider, providing education throughout the United States

Gerald “Jerry” Flanik is an ICC-Certified Master Code Professional (MCP) and holds over 35 various licenses and certifications. He is also a LEED BD+C Accredited Professional, Certified Floodplain Manager (CFM). Adjunct faculty instructor at Lakeland College in the Civil and Electrical Engineering Departments. Jerry is a professional consultant for corporations and government agencies throughout the United States, and for the International Code Council throughout the world.

Jerry holds a Bachelor of Science Degree in Electrical Engineering and a Bachelor of Science Degree in Mechanical Engineering from Cleveland State University; as well as, an Associates degree in Civil Engineering Technology from Lakeland Community College.

And he is President of Associated Consulting Solutions, LLC (ACS) in Cleveland, Ohio. ACS provides plan review services and provides pre and post design analysis services for architectural and engineering firms throughout the United States. ACS is also an ICC Preferred Education Provider, providing education throughout the United States.

Previously, Jerry served as the Chief Building Official for Lake County, Ohio for 16 years. Prior to working as a code official, he owned and operated a design build contracting company.

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Copywrite 2020, Associated Consulting Services, LLC

Course ObjectivesUpon completion of this course, learners will be better able to:‣ Describe the intent of the 2017 OMC allowing them

to apply comprehensive installation principles regarding General Requirements & Specific Appliances consistent with the requirements within the 2017 OMC and the 2015 IFGC referenced by the 2017 OMC.

‣ Discuss key requirements of the 2017 OMC regarding cooling towers, unit heaters, high & low radiant heating, and a variety of other specific appliances and equipment requirements for correct design and installation.

‣ Apply mechanical installation criteria regarding locations, service access, and protection methods for servicing appliances and equipment will be provided.

These are the objectives for this course. (read them)



Webinar Content

• Welcome

• Introduction to the 2017 OMC

• Definitions (Chapter 2)

• General Requirements (Chapter 3)

• Specific Appliances (OMC Chapter 9 & IFGC Chapter 6 & OMC Chapter 10)

There will be a series of breaks so that you can get up and stretch as well as attend to personal needs.



2017 OMC Chapter 1: Administration

Need administrative chapter



Chapter 1: IntroductionThe responsibilities of the various professionals are also established:

• The code official reviews the proposed work for code compliance and enforces the code in an unbiased, proper manner.

• The design professional designs a safe, operational mechanical system.

• The contractor installs the system in strict accordance with the plans and/or manufacturer’s installation requirements.

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“Every person is guaranteed equal code enforcement”

The code official reviews the proposed work for code compliance. During the course of design and construction, the review checks for maintenance of the spirit and intent of the law verify that the mechanical system provides adequate protection of public property, health, safety and welfare.

• As a public servant, the code official enforces the code in an unbiased, proper manner.• Every person is guaranteed equal code enforcement. When conflicts occur between the code official and design professional, contractor and/or building owner, Chapter 1 specifies the procedure for using the right of due process.

• The design professional designs a safe, operational mechanical system.

• The contractor installs the system in strict accordance with the plans and/or manufacturer’s installation requirements.


Copywrite 2020, Associated Consulting Services, LLC 7

Module Introduction• This chapter is largely concerned with maintaining “due

process of law” in enforcing the performance criteria contained in the body of the code.

• Chapter 1 is geared toward code officials, design professionals, contractors and building owners.

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Scope and Administration, provides an introduction to the code andestablishes the ground rules for administering a code enforcement program. Thischapter also identifies the specific mechanical equipment, appliances and systemsto which the code is intended to apply. Code officials are charged with recognizingand preventing hazards associated with mechanical equipment through enforcingminimum acceptable levels of safety.

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Ohio Mechanical Code Administrative Provisions101.1 Title. Chapters 4101:2-1 to 4101:2-15 of the Administrative Code shall be designated as the "Ohio Mechanical Code" for which the designation "OMC" may be substituted. The "International Mechanical Code® 2015, first printing, Chapters 2 to 15," as published by the "International Code Council, Inc." is used as the basis of this document. References in these chapters to "this code" or to the "mechanical code" in other sections of the Administrative Code shall mean the "Ohio Mechanical Code".

101.1 Title. Chapter 4101:2-1 to 4101:2-15 of the Administrative Code shall be designated as the "Ohio Mechanical Code" for which the designation "OMC" may be substituted. The "International Mechanical Code 2015, first printing, Chapters 2 to 15," as published by the "International Code Council, Inc." is used as the basis of this document. References in these chapters to "this code" or to the "mechanical code" in other sections of the Administrative Code shall mean the "Ohio Mechanical Code".

101.1 is the same in both publications.

OAC Chapter 4101:2-1 to 4101:2-15 of the Administrative Code IS the Ohio Mechanical Code

There are only 4 provisions in the Mechanical Code The rest are in the Building Code Provisions.



Ohio Mechanical Code Administrative Provisions• 101.2 Scope. The provisions of this code shall apply to the design, installation, maintenance,

alteration, repair, relocation, replacement, addition to, use and inspection of mechanical systems within buildings. This code shall also apply to those systems, system components, equipment and appliances specifically addressed herein.

• 101.3 Administrative and enforcement. For administrative and enforcement provisions of this code, refer to sections 101.2 to 115.4 of the building code.

• 101.4 Referenced standards. When a reference is made within the mechanical code to a federal statutory provision, an industry consensus standard, or any other technical publication, the specific date and title of the publication as well as the name and address of the promulgating agency are listed in Chapter 15 of this code. The application of the referenced standards shall be limited and as prescribed in Section 102.5 of the building code.

http://codes.ohio.gov/oac/4101%3A2-1

Note that other admin provisions for the mechanical code are listed in the Building Code.

There are only 4 provisions in the Mechanical Code The rest are in the Building Code Provisions. Let’s look at those now.



OMC Definitions (Chapter 2)



Chapter 2—Definitions- Provides an alphabetical listing of terms that are

commonly used throughout the code. - Assigns specific meanings to words or terms used in

the code.- Clarifies the intent of a requirement.- Maintains consistency in code interpretation.- Expands or restricts specific code requirements,

depending on the specific meaning, contained within the definition.

- Defines terms that are unique to the mechanical trades.

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-Assign specific meanings to words or terms used in the code.-Clarify the intent of a requirement.-Maintain consistency in code interpretation.-Expand or restrict specific code requirements, depending on the specific meaning, contained within the definition.-Define terms that are unique to the mechanical trades.



Introduction to Chapter 2

• Definitions are found both in this chapter and throughout the code.

• Codes, by their very nature, are technical documents.

• As such, literally every word, term and punctuation mark can add to or change the meaning of the intended result.

Definitions are found both in this chapter and throughout the code. Codes, by their very nature, are technical documents. As such, literally every word, term and punctuation mark can add to or change the meaning of the intended result.

Jerry, Can we have a quick example of meaning on any of the covered terms?



Definitions

AIR DISPERSION SYSTEM

• Any diffuser system designed to both convey air within a room, space or area and diffuse air into that space while operating under positive pressure. Systems are commonly constructed of, but not limited to, fabric or plastic film.

AIR DISPERSION SYSTEM. Any diffuser systemdesigned to both convey air within a room, space or area anddiffuse air into that space while operating under positive pressure.Systems are commonly constructed of, but not limitedto, fabric or plastic film.



Definitions• BREATHING ZONE. The region within an occupied space between

planes 3 and 72 inches (76 and 1829 mm) above the floor and more than 2 feet (610 mm) from the walls of the space or from fixed air-conditioning equipment.

RETURN AIR DUCT

SUPPLY AIR DUCT2’-0”

10’-0”

3”

FLOOR

BREATHING ZONE

CEILING

72”

This illustration shows what the code definition describes.



Is sitting, standing, or working in the “Breathing Zone?”

Ask learners this question and allow them to discuss.



Definitions• ENVIRONMENTAL AIR. Air that is

conveyed to or from occupied areas through ducts which are not part of the heating or air-conditioning system, such as ventilation for human usage, domestic kitchen range exhaust, bathroom exhaust, domestic clothes dryer exhaust and parking garage exhaust.

The types of air considered to be environmental air are included in this definition. These include typical building ventilation air, as required in Chapter 4, domestic kitchen and clothes dryer exhaust and exhaust air from both domestic and commercial bathrooms.

Environmental Air: Air that is conveyed to or from occupied areas through ducts which are not part of the heating or air-conditioning system, such as ventilation for human usage, domestic kitchen range exhaust, bathroom exhaust, domestic clothes dryer exhaust and parking garage exhaust.

Commercial cooking exhaust systems are not considered to be environmental air. Hazardous exhaust, such as flammable and explosive vapors; fumes; smoke; spray residues and mists; vapors from corrosive liquids; noxious and toxic gases and other items listed in Section 502 would not be considered environmental air. Dust, stock and refuse systems as detailed in Section 511 are also not considered to be environmental air.



DefinitionsSome key new definitions to the OMC include:

• DISCRETE PRODUCT. Products that are noncontinuous, individual, distinct pieces such as, but not limited to, electrical, plumbing and mechanical products and duct straps, duct fittings, duct registers and pipe hangers.

• DUCTLESS MINI-SPLIT SYSTEM. A heating and cooling system that is comprised of one or multiple indoor evaporator/air-handling units and an outdoor condensing unit that is connected by refrigerant piping and electrical wiring. A ductless mini-split system is capable of cooling or heating one or more rooms without the use of a traditional ductwork system.

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Discuss the new definitions and why they have been added

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Discrete Products

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SUSPENDED CEILINGRETURN AIR PLENUM (OPEN SPACE)

BAR JOISTS

METAL DECK

CONCRETE

DUCT STRAPS LISTED AND LABELED IN

ACCORDANCE WITH UL 2043

DUCT

This definition relates to Section 602.2.1.5 for products installed in plenums. Discrete products are not in sheet-goods form or continuous forms such as piping, tubing, wiring, conduit and ducts.

Discrete products are tested differently because of their form and the nature of the testing apparatus.



Ductless Mini-split System

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For example, they are popular for adding cooling to existing schools and churches where it would be difficult to install ductwork and conventional systems. Generally, multiple systems are installed to provide the needed coverage and capacity.

The evaporator and air-handler are combined in a single enclosure that is suitably “dressed up” to be exposed on finished walls of building interiors. Otherwise, such systems are the same as the traditional split system having separate condensing units and evaporator fan /coil units, interconnected by refrigerant piping and control wiring.



DefinitionsSome key older definitions in the OMC include:

• APPLIANCE. A device or apparatus that is manufactured and designed to utilize energy and for which this code provides specific requirements.

‣ High-heat appliance. Any appliance in which the products of combustion at the point of entrance to the flue under normal operating conditions have a temperature greater than 2,000°F (1093°C).

‣ Low-heat appliance (residential appliance). Any appliance in which the products of combustion at the point of entrance to the flue under normal operating conditions have a temperature of 1,000°F (538°C) or less.

‣ Medium-heat appliance. Any appliance in which the products of combustion at the point of entrance to the flue under normal operating conditions have a temperature of more than 1,000°F (538°C), but not greater than 2,000°F (1093°C).

• APPLIANCE, VENTED. An appliance designed and installed in such a manner that all of the products of combustion are conveyed directly from the appliance to the outdoor atmosphere through an approved chimney or vent system.

• EQUIPMENT. All piping, ducts, vents, control devices and other components of systems other than appliances which are permanently installed and integrated to provide control of environmental conditions for buildings. This definition shall also include other systems specifically regulated in this code.

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Allow the learners to read these definitions and discuss their observations.

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Appliance

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An appliance is a manufactured component or assembly of components that converts one form of energy into a different form of energy to serve a specific purpose. The term “appliance” generally refers to residential- and commercial-type equipment that is manufactured in standardized sizes or types. The term “appliance” is generally not associated with industrial-type equipment. For the application of the code provisions, the terms “appliance” and “equipment” are mutually exclusive.

Examples of appliances include furnaces; boilers; water heaters; room heaters; refrigeration units; cooking equipment; clothes dryers; wood stoves; pool, spa and hot tub heaters; unit heaters; ovens and similar fuel-fired or electrically operated appliances (see the definition of “Equipment”).



Equipment

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In the code, appliances are not referred to as equipment and vice versa. Throughout the code, the terms “equipment” and “appliance” have been used as necessary to match the terms with the intent and context of the code text. Traditionally, the term “equipment” has referred to large machinery and specialized hardware not thought of as an “appliance.” See the definition of “Appliance” and the commentary for Section 301.7.



General Requirements (Chapter 3)



Chapter 3 Introduction• Chapter 3—General Regulations:

- This chapter governs the approval and installation of all mechanical equipment and appliances that are regulated by the code.

- Recall---Section 101.2 establishes the scope of application of the code

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-This chapter governs the approval and installation of all mechanical equipment and appliances that are regulated by the code.

-Recall---Section 101.2 establishes the scope of application of the code

OMC Administration, General Requirements and Specific Appliances For Contractor Continuing Ed Series


Section 301 - General301.7 – Listed and labeled‣ The code intends to require listing and

labeling for appliances, such as boilers, furnaces, condensing units, factory-built fireplaces, direct-fired heaters, cooking appliances, rooftop HVAC units, etc.

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301.7 Listed and Labeled

Appliances regulated by this code shall be listed and labeled for the application in which they are installed and used, unless otherwise approved in accordance with Section 114 of the building code .

Exception: Listing and labeling of equipment and appliances used for refrigeration shall be in accordance with Section 1101.2.

The code intends to require listing and labeling for appliances, such as boilers, furnaces, condensing units, factory-built fireplaces, direct-fired heaters, cooking appliances, rooftop HVAC units, etc.

The code also requires listing for system components as specifically stated in the text addressing such components.

A fundamental principle of the code is the reliance upon the labeling process to ensure appliance and equipment performance, and approvals granted in accordance with Section 105 must be well justified and supported with documentation.

Appliances can only be used in accordance with their listing and manufacturer’sinstructions. This requirement is intended to prevent the use of an appliance in an application for which it has not been tested.



301.9 Label Information

301.9 Label Information

A permanent factory-applied nameplate(s) shall be affixed to appliances on which shall appear in legible lettering, the manufacturer's name or trademark, the model number, serial number and the seal or mark of the approved agency. A label shall also include the following:

1. Electrical equipment and appliances: Electrical rating in volts, amperes and motor phase; identification of individual electrical components in volts, amperes or watts, motor phase; Btu/h (W) output; and required clearances.

2. Absorption units: Hourly rating in Btu/h (W); minimum hourly rating for units having step or automatic modulating controls; type of fuel; type of refrigerant; cooling capacity in Btu/h (W); and required clearances.

3. Fuel-burning units: Hourly rating in Btu/h (W); type of fuel approved for use with the appliance; and required clearances.

4. Electric comfort heating appliances: Electric rating in volts, amperes and phase; Btu/h (W) output rating; individual marking for each electrical component in amperes or watts, volts and phase; and required clearances from combustibles.

Discuss the information that appears on the label. Perhaps insert a shot of a label and put in an animation that highlights the parts.



301.18 Seismic Resistance

301.18 Seismic Resistance

Where earthquake loads are applicable in accordance with the building code, mechanical system supports shall be designed and installed for the seismic forces in accordance with the building code.

Discuss



301.14 Repair

301.14 Repair

Defective material or parts shall be replaced or repaired in such a manner so as to preserve the original approval or listing.

Discuss



Section 302 – Protection of Structure• Installation of mechanical systems

must not adversely affect the structural and fire-resistance integrity of building components.

• The cutting, notching and drilling of structural members, and the penetration of assemblies must be regulated to control the damage.

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302.1 Structural SafetyThe building or structure shall not be weakened by the installation of mechanical systems. Where floors, walls, ceilings or any other portion of the building or structure are required to be altered or replaced in the process of installing or repairing any system, the building or structure shall be left in a safe structural condition in accordance with the building code.

Installation of mechanical systems must not adversely affect the structural and fire-resistance integrity of building components.



302.3 – Cutting, Notching and Boring in Wood Framing

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1/6 DEPTH OF JOIST

5/6 REMAININGDETAIL B1/6 DEPTH OF JOIST

5/6 REMAINING

DETAIL A

DEP

TH

DETAIL A DETAIL B 5/6 REMAINING

NOTCHING PROHIBITED IN MIDDLE 1/3 OF SPAN

1/6 DEPTH OF JOIST

Discuss the requirements for Cutting, Notching and Boring referring to the illustrations. 302.3.2 Stud cutting and notching. In exterior wallsand bearing partitions, a wood stud shall not be cut ornotched in excess of 25 percent of its depth. In nonbearingpartitions that do not support loads other than the weightof the partition, a stud shall not be cut or notched in excessof 40 percent of its depth.302.3.1 Joist notching. Notches on the ends of joistsshall not exceed one-fourth the joist depth. Holes bored injoists shall not be within 2 inches (51 mm) of the top orbottom of the joist, and the diameter of any such hole shallnot exceed one-third the depth of the joist. Notches in thetop or bottom of joists shall not exceed one-sixth the depthand shall not be located in the middle third of the span.



302.3.3 Bored Holes

• Bored holes in studs located in load-bearing and exterior walls must not exceed 40 percent of the stud depth.

• Studs in non-load-bearing walls must not have bored holes that exceed 60 percent of the depth of the stud. A bored-hole’s edge must not be less than 5/8 inch away from a stud edge.

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5/8” MINIMUM

HOLE: LOAD-BEARING WALLS -40% OF STUD DEPTH

NONLOAD-BEARING WALLS -60% OF STUD

The requirement follows: Summarize on slide and refer to illustration302.3.3 Bored holes. The diameter of bored holes in wood studs shall not exceed 40 percent of the stud depth. The diameter of bored holes in wood studs shall not exceed 60 percent of the stud depth in nonbearing partitions. The diameter of bored holes in wood studs shall not exceed 60 percent of the stud depth in any wall where each stud is doubled, provided that not more than two such successive doubled studs are so bored. The edge of the bored hole shall be not closer than 5/8 inch (15.9 mm) to the edge of the stud. Bored holes shall be not located at the same section of stud as a cut or notch.



OBC Section 2308.4.2.4 – Holes Bored in Floor JoistsOBC 2308.4.2.4 –Bored holes‣ Holes bored for

pipes or cablemust not be within 2 inches (51 mm) of the top or bottom of the wood.

‣ The diameter of the hole must not exceed one-third of the depth of the wood joist.

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2” MIN. REQUIRED TO TOP OR BOTTOM OF JOIST

MAXIMUM DIAMETER OF HOLES IS 1/3 OF JOIST

The requirement follows: Summary on slide and refer to illustrationOBC Section 2308.4.2.4 – Holes bored in floor joists. Notches on the ends of joists shall not exceed one-fourth the joist depth. Holes bored in joists shall not be within 2 inches (51 mm) of the top or bottom of the joist, and the diameter of any such hole shall not exceed one-third the depth of the joist. Notches in the top or bottom of joists shall not exceed one-sixth the depth and shall not be located in the middle third of the span.



Section 302 –Protection of Structure302.3.4 – Engineered wood products‣ The code prohibits cuts, notches

and holes in trusses, structural composite veneer lumber, structural glue-laminated members and I-joists except where such alterations were considered in the design of the member.

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302.3.4 Engineered wood products

Cuts, notches and holes bored in trusses, structural composite lumber, structural glue-laminated members and I-joists are prohibited except wherepermitted by the manufacturer’s recommendations or where the effects of such alterations are specifically considered in the design of the member by a registered design professional.

The requirement follows: Summary on slide and refer to illustration

302.3.4 Engineered wood products. Cuts, notchesand holes bored in trusses, structural composite lumber,structural glue-laminated members and I-joists are prohibitedexcept where permitted by the manufacturer’s recommendationsor where the effects of such alterations arespecifically considered in the design of the member by aregistered design professional.



302.5 Cutting, Notching and Boring in Steel Framing

302.5 Cutting, Notching and Boring in Steel Framing

The cutting, notching and boring of steel framing members shall comply with Sections 302.5.1 through 302.5.3.

302.5.1 Cutting, Notching and Boring Holes in Structural Steel Framing

The cutting, notching and boring of holes in structural steel framing members shall be as prescribed by the registered design professional.

Courtesy of SSMA

Refer to illustration



Section 303 – Equipment and Appliance Location

• Mechanical systems and their components must be located as indicated by the manufacturer’s installation instructions for the listed equipment or appliances.

• Limits the location of fuel-fired appliances in specific rooms or spaces.

Mechanical systems and their components must be located as indicated by the manufacturer’s installation instructions for the listed equipment or appliances.

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Section 303 – Equipment and Appliance Location

303.2 – Hazardous locations- A hazardous location does not necessarily warrant

classification as a high-hazard use group in accordance with the building code.

Appliances located in a hazardous location require special consideration with respect to design, construction and installation because of the potential for an explosion or fire caused by the presenceof dust, flammable vapors and/or highly combustible materials.



Section 303 – Equipment and Appliance Location303.3 – Prohibited locations

‣ Fuel-fired appliances shall not be located in, or obtain combustion air from, any of the following rooms or spaces:

• Sleeping rooms• Bathrooms• Toilet rooms• Storage closets• Surgical rooms

Exception: This section shall not apply to the following appliances:

1. Direct-vent appliances that obtain all combustion air directly from the outdoors.

2. Solid fuel-fired appliances, provided thatcombustion air is provided in accordance with the manufacturers' instructions.

3. Appliances installed in a dedicated enclosure in which all combustion air is taken directly from the outdoors, in accordance with Chapter 7. Access to such enclosure shall be through a solid door, weather-stripped in accordance with the exterior door air leakage requirements of the applicable energy conservation code referenced in Chapter 13 of the building code and equipped with an approved self-closing device.

The intent of this section is to prevent fuel-fired appliances from being installed in rooms and spaces where the combustion process could pose a threat to the occupants therein.



2017 OMC Chapter 3: Section 304 Installation

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Section 304 – Installation• All equipment and appliances must comply with the code and manufacturer’s installation instructions.

304.1 General

Equipment and appliances shall be installed as required by the terms of their approval, in accordance with the conditions of the listing, the manufacturer's installation instructions and this code. Manufacturer's installation instructions shall be available on the job site at the time of inspection.

All equipment and appliances must comply with the code and manufacturer’s installation instructions.



Section 304 – Installation304.2 – Conflicts‣ Although very rare, there are

instances where some code provisions intentionally differ or conflict with manufacturer’s installation instructions.

‣ It is not the intent of this section to cause the manufacturer’s requirements to be ignored where such requirements are more stringent or restrictive than the code.

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304.2 Conflicts

Where conflicts between this code and the conditions of listing or the manufacturer's installation instructions occur, the provisions of this code shall apply.

Exception: Where a code provision is less restrictive than the conditions of the listing of the equipment or appliance or the manufacturer's installation instructions, the conditions of the listing and the manufacturer's installation instructions shall apply.

Although very rare, there are instances where some code provisions intentionally differ or conflict with manufacturer’s installation instructions.



Section 304 – Installation304.3 – Elevation of ignition source‣ This section will effectively prohibit the

installation of most furnaces, boilers, space heaters, clothes dryers and water heaters directly on the floor of residential garages and other occupancies where flammable or combustible vapors may be present.

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304.3 Elevation of Ignition Source

Equipment and appliances having an ignition source and located in hazardous locations and public garages, private garages, repair garages, automotive motor fuel-dispensing facilities and parking garages shall be elevated such that the source of ignition is not less than 18 inches (457 mm) above the floor surface on which the equipment or appliance rests. For the purpose of this section, rooms or spaces that are not part of the living space of a dwelling unit and that communicate directly with a private garage through openings shall be considered to be part of the private garage.

Exception: Elevation of the ignition source is not required for appliances that are listed as flammable vapor ignition resistant.

This section will effectively prohibit the installation of most furnaces, boilers, space heaters, clothes dryers and water heaters directly on the floor of residential garages and other occupancies where flammable or combustible vapors may be present.



Section 304 – Installation

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304.3 – Elevation of Ignition Source

• This section will effectively prohibit the installation of most furnaces, boilers, space heaters, clothes dryers and water heaters directly on the floor of residential garages and other occupancies where flammable or combustible vapors may be present.

OIL-FIRED WATER HEATER

BURNER HEAD

COMBUSTION CHAMBER

RAISED PLATFORM

GARAGE FLOOR

18” MINIMUM

Exception: Elevation of the ignition source is not required for appliances that are listed as flammable vapor ignition resistant.

The code interpretation follows: Summarize on slide and refer to illustration

The exception acknowledges and allows the installation of appliances that are flammable vapor ignition resistant (FVIR) without elevation above the garagefloor. FVIR-type appliances are designed to not ignite flammable vapors outside of the appliance combustion chamber.

Oil, solid-fuel and electric FVIR appliances are not known by the instructor to exist.

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SUSPENDED UNIT HEATER

8’-0” ENTRY DOOR

HEIGHT

9’-0

” M

IN.

1’-0” MIN.

Section 304 – Installation

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304.6 – Public garagesAppliances located in public garages, motor fueling-dispensing facilities, repair garages or other areas frequented by motor vehicles, shall be installed not less than 8 feet above the floor. Where motor vehicles are capable of passing under an appliance, the appliance shall be installed at the clearances required by the appliance manufacturer and not less than 1 foot higher than the tallest vehicle garage door opening.Exception: The requirements of this section shall not apply where the appliances are protected from motor vehicle impact and installed in accordance with Section 304.3 and NFPA 30A.

The code interpretation follows: Summarize on slide and refer to illustrationAppliances located in public garages, motor fueling-dispensing facilities, repair garages or other areas frequented by motor vehicles, shall be installed not lessthan 8 feet above the floor.

Where motor vehicles are capable of passing under an appliance, the appliance shall be installed at the clearances required by the appliance manufacturer and not less than 1 foot higher than the tallest vehicle garage door opening.



Section 304.7 Private Garages

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303.4 Protection from damage. Appliances shall not beinstalled in a location where subject to mechanical damage unless protected by approved barriers.

304.7 – Private garages- Appliances installed in a private garage shall be a minimum of 6 feet

above the floor unless the appliance complies with Section 303.4.

FURN

ACE

6’-0” MINIMUM

The code interpretation follows: Summarize on slide and refer to illustrationAppliances installed in a private garage shall be a minimum of 6 feet above the floor unless the appliance complies with Section 303.4.

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46

FURN

ACE

Would you consider this an approved barrier?

6’-0” MINIMUM


Discussion activity: Ask if this is an approved barrier and briefly discuss. Next slide has answers

Appliances installed in a private garage shall be a minimum of 6 feet above the floor unless the appliance complies with Section 303.4.

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47

FURN

ACE

MINIMUM 2” SCH. 40 IRON PIPE FILLED WITH CONCRETE

6” DIA. MIN.

12” MIN.

HEIGHT 36” MIN.

OPTION 1 PIPE BOLLARD

6”

BOLT TO SLAB

OPTION 2WHEEL BARRIER

Would you consider this an approved barrier?

6’-0” MINIMUM


Discussion activity continued: Ask if this is an approved barrier and briefly discuss.

Appliances installed in a private garage shall be a minimum of 6 feet above the floor unless the appliance complies with Section 303.4.

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304.10 Clearances From Grade

304.10 Clearances From Grade

Equipment and appliances installed at grade level shall be supported on a level concrete slab or other approved material extending not less than 3 inches (76 mm) above adjoining grade or shall be suspended not less than 6 inches (152 mm) above adjoining grade. Such support shall be in accordance with the manufacturer's installation instructions.

Discuss code section



Section 304 – Installation304.9 – Clearances to combustible construction‣ Reduction of the required clearances to combustibles is

allowed only where the combustibles are protected by one of the methods outlined in Section 308, and clearance reduction is not prohibited by Section 308 or the appliance and equipment listing.

‣ Clearances to combustibles also apply to furnishings, window treatments and moveable components.

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304.9 Clearances to Combustible Construction

Heat-producing equipment and appliances shall be installed to maintain the required clearances to combustible construction as specified in the listing and manufacturer's instructions. Such clearances shall be reduced only in accordance with Section 308. Clearances to combustibles shall include such considerations as door swing, drawer pull, overhead projections or shelving and window swing, shutters, coverings and drapes. Devices such as doorstops or limits, closers, drapery ties or guards shall not be used to provide the required clearances.


Heat-producing equipment and appliances shall be installed to maintain the required clearances to combustible construction as specified in the listing and manufacturer’s instructions. Such clearances shall be reduced only in accordance with Section 308. Clearances to combustibles shall include such considerations as door swing, drawer pull, overhead projections or shelving and window swing, shutters, coverings and drapes. Devices such as doorstops or limits, closers, drapery ties or guards shall not be used to provide the required clearances.

304.9 Clearances to combustible construction. Heat producing equipment and appliances shall be installed to main-tain the required clearances to combustible construction as specified in the listing and manufacturer’s instructions.

Such clearances shall be reduced only in accordance with Section 308. Clearances to combustibles shall include such consider-ations as door swing, drawer pull, overhead projections or shelving and window swing, shutters, coverings and drapes.



Devices such as doorstops or limits, closers, drapery ties or guards shall not be used to provide the required clearances.



Are Guards Required?

9 ft.

10 ft.

11 ft.

Analyze plan. Will guards be required regarding RTU locations?This code section will help to determine it so please point out the places where indicated.

304.11 – GuardsGuards are required to provide protection for personnel working on or servicing equipment, appliances or components that are within 10 feet (3048 mm) of a roof edge or surface that is more than 30 inches (762 mm) above the surface below.



Section 304 – Installation304.11 – Guards‣ Guards are required to

provide protection for personnel working on or servicing equipment, appliances or components that are within 10 feet (3048 mm) of a roof edge or surface that is more than 30 inches (762 mm) above the surface below.

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GREATER THAN 30 INCHES

GUARD

ROOFTOP

APPLIANCE

GUARDS NOT REQUIRED AT DOOR OPENINGS

10 FT. OR GREATER

This slide debriefs the requirements for guards on rooftops

Guards are required to provide protection for personnel working on or servicingequipment, appliances or components that are within 10 feet (3048 mm) of a roof edge or surface that is more than 30 inches (762 mm) above the surface below.

Exception: Guards are not required on roofs where anchorage-connector devicesare installed at specified intervals and locations that allow service personnel to use safety harnesses and lines as part of a fall-arresting system.



Section 304.11 Guards• Exception: Guards are not required where permanent fall

arrest/restraint anchorage connector devices that comply with ANSI/ASSE Z359.1 are affixed for use during the entire roof covering lifetime.

• The devices shall be re-evaluated for possible replacement when the entire roof covering is replaced.

• The devices shall be placed not more than 10 feet (3048 mm) on center along hip and ridge lines and placed not less than 10 feet (3048 mm) from the roof edge or open side of the walking surface.

Industrial Safety Products

The exception allows for fall-arresting restraint systems to be employed instead of guards on roofs.

Guards are not required on roofs where anchorage-connector devices are installed at specified intervals and locations that allow service personnel to use safety harnesses and lines as part of a fall-arresting system. The new exception is aimed at sloped roofs where such safety systems are typically utilized. Restraint systems have limited application for flat roofs, where mechanical appliances andEquipment are typically located, because of the impracticality of workers navigating around rooftop heating, ventilation and air conditioning (HVAC) units while tethered to anchorage points.



Section 305 – Piping Support• Pipe hangers and supports shall have sufficient

strength to withstand all anticipated static and specified dynamic loading conditions associated with the intended use.

• Pipe hangers and supports that are in direct contact with piping shall be of approved materials that are compatible with the piping and that will not promote galvanic action.

• Piping systems, including refrigerant, and fuel oil, must be supported in accordance with this section.

• Support of the system is as important as any other part of the overall design.

• Piping in concealed locations, other than cast-iron or steel that is installed through holes or notches in structural members, must be protected by steel shield plates to prevent damage.

Image courtesy of https://www.rhkeleher.com/


Piping systems, including refrigerant, and fuel oil, must be supported inaccordance with the requirements of this section.

As with all piping systems, the support of the system is as important as any other part of the overall design.

Inadequate support can cause piping to fail under its own weight, resulting in fire, explosion or property damage.

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Table 305.4 –Piping Support Spacing• Piping shall be supported at distances not

exceeding the spacing specified in Table 305.4, or in accordance with ANSI/MSS SP-58.

Notes to Tablea. See Section 301.18.b. The maximum horizontal spacing of cast-iron pipe hangers shall be increased to 10 feet where 10-foot lengths of pipe are installed.c. Mid-story guide.

TABLE 305.4 PIPING SUPPORT SPACINGa

PIPING MATERIALMAXIMUM

HORIZONTALSPACING (feet)

MAXIMUMVERTICAL

SPACING (feet)ABS pipe 4 10c

Aluminum pipe and tubing 10 15Brass pipe 10 10Brass tubing, 11/4-inch diameterand smaller 6 10

Brass tubing, 11/2-inch diameterand larger 10 10

Cast-iron pipeb 5 15Copper or copper-alloy pipe 12 10Copper or copper-alloy tubing,11/4-inch diameter and smaller 6 10

Copper or copper-alloy tubing,11/2-inch diameter and larger 10 10

CPVC pipe or tubing, 1 inchand smaller 3 10c

CPVC pipe or tubing, 11/4-inchand larger 4 10c

Lead pipe Continuous 4PB pipe or tubing 22/3 (32 inches) 4PE-RT < 1 inch and smaller 22/3 (32 inches) 10c

PE-RT > 11/4 inches and larger 4 10c

PEX tubing 22/3 (32 inches) 10c

Polypropylene (PP) pipe ortubing, 1 inch and smaller 22/3 (32 inches) 10c

Polypropylene (PP) pipe ortubing, 11/4 inches and larger 4 10c

PVC pipe 4 10c

Steel tubing 8 10Steel pipe 12 15

Discuss code table



Table 305.4 Piping Support Spacinga

PIPING MATERIALMAXIMUM

HORIZONTALSPACING (feet)

MAXIMUMVERTICAL

SPACING (feet)ABS pipe 4 10c

Aluminum pipe and tubing 10 15Brass pipe 10 10

Brass tubing, 11/4-inch diameter and smaller 6 10

Brass tubing, 11/2-inch diameter and larger 10 10

Cast-iron pipeb 5 15Copper or copper-alloy pipe 12 10

Copper or copper-alloy tubing, 11/4-inch diameter and smaller 6 10

Copper or copper-alloy tubing, 11/2-inch diameter and larger 10 10

CPVC pipe or tubing, 1 inch and smaller 3 10c

CPVC pipe or tubing, 11/4-inch and larger 4 10c

Lead pipe Continuous 4PB pipe or tubing 22/3 (32 inches) 4PE-RT < 1 inch and smaller 22/3 (32 inches) 10c

PE-RT > 11/4 inches and larger 4 10c

PEX tubing 22/3 (32 inches) 10c

Polypropylene (PP) pipe or tubing, 1 inch and smaller 22/3 (32 inches) 10c

Polypropylene (PP) pipe or tubing, 11/4 inches and larger 4 10c

PVC pipe 4 10c

Steel tubing 8 10Steel pipe 12 15

Notes to Tablea. See Section 301.18.b. The maximum horizontal spacingof cast-iron pipe hangers shall beincreased to 10 feet where 10-footlengths of pipe are installed.c. Mid-story guide.

Provide examples of horizontal and vertical support using different pipe materials.

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Section 306 –Access and Service Space• Appliances, controls

devices, heat exchangers and HVAC system components that utilize energy shall be accessible for inspection, service, repair and replacement.

• This allows access to all parts of a mechanical system without damaging or disconnection obstructions.

CEILINGACCESS PANEL

HVAC CONTROLS


Sometimes HVAC controls, heat exchanger units and similar devices are installed behind, under or above permanent construction or installed where other appliances or equipment obstructs access. This new section expands the access requirements beyond appliances.

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Section 306 –Access and Service Space306.1.1 – Central furnaces‣ The specified minimum clearances apply even though the manufacturer’s instructions might permit less clearance.

306.3 – Appliances in attics‣ Requires a suitable access opening, passageway and work space that will allow reasonably easy access without

endangering the service person.


The specified minimum clearances apply even though the manufacturer’s instructions might permit less clearance.

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Section 306.3 – Appliances in Attics

LIGHTING FIXTURE LAMP PROTECTED CAGE DESIREABLE

WHERE THE PASSAGE WAYIS UNOBSTRUCTED AND NOT LESS THAN 6 FEET

HIGH AND 22 INCHES WIDE FOR ITS ENIRE LENGTH,

THE PASSAGEWAY SHALL BE NOT GREATER THAN

50 FEET IN LENGTH

LIGHT SWITCH

MINIMUM 30” X 30”

FLOOR AREA AT REQUIRED SERVICE SIDE

ACCESS OPEING LARGE ENOUGH TO REMOVE LARGEST

APPLIANCE

SOLID FLOORING 24” WIDE

306.4.1 Electrical Requirements

A luminaire controlled by a switch located at the required passageway opening and a receptacle outlet shall be provided at or near the appliance location in accordance with NFPA 70.

Discuss 306.3 and also the requirements for electrical requirements in attics

306.3 – Appliances in atticsRequires a suitable access opening, passageway and work space that will allow reasonably easy access without endangering the service person.

The intent of this section is to require a suitable access opening, passageway andwork space that will allow reasonably easy access without endangering the service person.

The access passageway length of 20 feet to the appliances can be extended to 50 feet in attic, if the passageway has a minimum height of 6 feet and width of 22 inches for the entire length.

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Section 306 –Access and Service Space306.4 – Appliances under floors

- The access passageway to the appliances can be extended to unlimited length under floors, if the passageway has a minimum height of 6 feet and width of 22 inches for the entire length.

LIGHT SWITCH (light guard is disirable)

MINIMUM 30” X 30” LEVEL

WORKING SPACE

ACCESS OPEING LARGE ENOUGH TO REMOVE LARGEST APPLIANCE

PASSAGEWAY TO BE A MINIMUM HEIGHT 6 FEET AND 30” x 22” IN DIRECTION TO THE APPLAINCE

Discuss 306.4 and also the requirements for electrical requirements

Section 306.4 – Appliances under floorsThe more difficult it is to access appliances and equipment, the less likely it is that the necessary inspection and servicing will be performed. Attic and crawl space installations suffer from the “out-of-sight, out-of-mind” syndrome.

The access passageway to the appliances can e extended to unlimited length under floors, if the passageway has a minimum height of 6 feet (1830 mm) and width of 22 inches (559 mm) for the entire length.

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