Significant changes to the commercial provisions in 2012 IECC

10/15/2013


Air leakage

Figure 3: Fans set up in the doorway of a building to perform a full-building blower test, a compliance option listed in Section C402.4.1.2. Courtesy: Retrotec Inc.Except for climate zones 1 through 3, a continuous air barrier is required around the thermal building envelope (C402.4). Subsection C402.4.1.1 details the construction requirements of the air barrier and subsection C402.4.1.2 lists three compliance options, one of which is required to be met: materials, assemblies, or full building testing (see Figure 3). A table of maximum fenestration assembly leakage rates is provided in Section C402.4.3.

Unless required to comply with IBC Section 715 or 715.4 or UL 1784, doors and access openings from conditioned spaces into shafts, chutes, stairways, and elevator lobbies shall meet the fenestration requirements or be sealed per a newly added section (C402.4.4). Stairway, shaft, and outdoor air intakes and exhausts shall be provided with motorized dampers limited to a leakage rate of 4 cfm/sq ft. Gravity dampers meeting a 20 cfm/sq ft leakage rate are permitted as an exception for outdoor intakes and exhausts in climate zones 1 to 3, buildings less than 3 stories, as exhaust and relief dampers, and where the design outdoor air intake or exhaust capacity is ≤ 300 cfm. Dampers smaller than 2 ft in either dimension are permitted a leakage rate of 40 cfm/sq ft (C402.4.5).

Building envelope

Figure 4: Low-sloped roofs (<1/6 grade) directly above conditioned spaces in climate zones 1 through 3 must comply with roof reflectance and emittance requirements listed in newly added Table C402.2.1.1. Courtesy: A S Klein Engineering

Exposed outdoor piping insulation must now be protected from degradation, and use of adhesive tapes is not permitted (C403.2.8.1). Some exceptions to piping insulation requirements (C403.2.8) were also modified. The temperature range in exception 3 was decreased from 55 to 105 F to 60 to 105 F. Exception 5 no longer applies to piping 4 ft or less in length but instead to strainers, control valves, and balancing valves on piping with a diameter of 1 in. or less. Exception 6 was added that applies to buried piping conveying fluids ≤ 60 F.

Table C403.2.8, Minimum Pipe Insulation Thickness, was expanded, and the insulation thicknesses for very hot fluids and steam were increased tremendously; however, a footnote was added allowing a thickness reduction for direct-buried heating and hot water system piping. An exception was added to Section C404.5, Pipe Insulation, for heat-traced piping systems, specifying that they must meet the insulation thickness requirements per the manufacturer’s installation instructions.

A minimum insulation of R-3.5 is now required for radiant panels, associated U-bends and headers, and the bottom surfaces of structures incorporating radiant heating (C402.2.8).



LAWRENCE , PA, United States, 10/25/13 05:01 PM:

The article should state that very few states and jurisdictions are adopting the 2012 I Codes, and when they do, they are being amended. The reasons for not adopting are the Codes are that they are too complicated, too expensive, and cannot be fully enforced. Indeed, some states and jurisdictions are looking to move to a six year or longer code adoption cycle for these and other reasons. This move concerns the code writing groups, whose income is heavily dependent on selling books.
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
Your leaks start here: Take a disciplined approach with your hydraulic system; U.S. presence at Hannover Messe a rousing success
Hannover Messe 2016: Taking hold of the future - Partner Country status spotlights U.S. manufacturing; Honoring manufacturing excellence: The 2015 Product of the Year Winners
Inside IIoT: How technology, strategy can improve your operation; Dry media or web scrubber?; Six steps to design a PM program
Getting to the bottom of subsea repairs: Older pipelines need more attention, and operators need a repair strategy; OTC preview; Offshore production difficult - and crucial
Digital oilfields: Integrated HMI/SCADA systems enable smarter data acquisition; Real-world impact of simulation; Electric actuator technology prospers in production fields
Special report: U.S. natural gas; LNG transport technologies evolve to meet market demand; Understanding new methane regulations; Predictive maintenance for gas pipeline compressors
Warehouse winter comfort: The HTHV solution; Cooling with natural gas; Plastics industry booming
Managing automation upgrades, retrofits; Making technical, business sense; Ensuring network cyber security
Designing generator systems; Using online commissioning tools; Selective coordination best practices

Annual Salary Survey

Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.

There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.

But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.

Read more: 2015 Salary Survey

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
This article collection contains several articles on the vital role that compressed air plays in manufacturing plants.
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.
This article collection contains several articles on strategic maintenance and understanding all the parts of your plant.
click me