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Historical document collection available

Additional historical documents have been added to American Institute of Steel Construction’s (AISC’s) online collection. Dating back to 1885, the newly added collections are of shape producer catalogs, which are the basis for much of the information found in AISC Design Guide 15, Rehabilitation and Retrofit Guide. Information includes data for discontinued wrought iron and steel shapes, a review of ASTM material standards since 1990, and information on enhancing structural systems. The historical ePubs collections available to AISC members and are part of the organization’s preservation of unique industry documents. For more information, visit www.aisc.org/epubs.

Online calculator updated

National Roofing Contractors Association’s (NRCA’s) EnergyWise Roof Calculator Online now includes 2012 International Energy Conservation Code

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(IECC) and International Green Construction Code (IgCC) information. The updated online tool also now includes the new minimum long-term thermal resistance (LTTR) values for polyisocyanurate insulation. The calculator allows users to enter specific roof assembly information including area, climate region, heating appliance type, roof openings, and materials. Then, a report is generated including the estimated heating and cooling costs and minimum thermal requirements. The tool can be accessed at energywise.nrca.net.

NIBS ebook released

The national standard for building information modelling (BIM) has been released on ebook by National Institute of Building

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Sciences (NIBS) buildingSMART alliance. The National BIM Standard–United States (NBIMS-US) Version 2 (V2) is the first consensus-based standard governing BIM in the United States. Originally released as an online standard, the mobile version will allow users to access the document anywhere. Links to reference supporting material are included throughout, and the standard covers the full lifecycle of the building and is arranged into reference standards, information exchange standards, and best practice guidelines. Visit www.nationalbimstandard.org for more information.

R-values: Controversy and performance values (cont’d)

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Photo © BigStockPhoto/ Leung Cho Pan

The first article in this two-part series lays the groundwork for this discussion on R-values and their use as a metric for thermal insulation performance. Now, in this second part, the author examines the real-world use of it as a gauge for ensuring insulation products function as intended.1

When it was created, R-value was really the only useful tool in evaluating the effectiveness of the available building insulations, among other materials. After the R-value rule was instituted, the energy efficiency of buildings improved, as well as the nation’s energy conservation effort and the marketplace and technology for insulations. Today, though, most of the insulation industry knows better, and R-values may well be dismissed as meaningless numbers on an insulation package that help to better organize warehouses. Continue reading

EIFS: Then and now

Our September 2013 article on entrapped moisture touched on issues related to early iterations of exterior insulation and finish systems (EIFS). It led to this letter to the editor from Scott Robinson, of the EIFS Industry Members Association (EIMA).

While going through the September 2013 issue of The Construction Specifier, I read, “Claddings and Entrapped Moisture: Lessons Learned from Early EIFS,” by John Koester. As manager of public affairs with EIMA—a national non-profit technical trade association comprising EIFS manufacturers, suppliers, distributors, and applicators—the article gave me pause. Continue reading