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Laboratory Testing of Candidate Coating Systems for Protecting A 490 Bolts in One World Trade Center Construction

Laboratory Testing of Candidate Coating Systems for Protecting A 490 Bolts in One World Trade Center Construction
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The construction of the new One World Trade Center (WTC) in New York includes exposed steel members and bolted splice plates. Accordingly, surface preparation and coating system selection for the bolt/washer/nut assemblies for the bolted connections was critical, since the splice plates would be visible. There was little published information on surface preparation and coating requirements for ASTM A 490 black bolts. 

Product Number: 41210-529-SG
Author: John  Bullard, William  D.  Corbett
Publication Date: 2010
Industry: Coatings
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$20.00
$20.00

The construction of the new One World Trade Center (WTC) in New York includes exposed steel members and bolted splice plates. Accordingly, surface preparation and coating system selection for the bolt/washer/nut assemblies for the bolted connections was critical, since the splice plates would be visible. There was little published information on surface preparation and coating requirements for ASTM A 490 black bolts. Further, since on site surface preparation of bolted connections would be costly and labor intensive, the Port Authority of New York & New Jersey (Port Authority) investigated the viability of using a proprietary pretreatment process on the bolts prior to installation and coating application, in order to minimize on‐site surface preparation without adversely affecting coating system adhesion or performance. 

The construction of the new One World Trade Center (WTC) in New York includes exposed steel members and bolted splice plates. Accordingly, surface preparation and coating system selection for the bolt/washer/nut assemblies for the bolted connections was critical, since the splice plates would be visible. There was little published information on surface preparation and coating requirements for ASTM A 490 black bolts. Further, since on site surface preparation of bolted connections would be costly and labor intensive, the Port Authority of New York & New Jersey (Port Authority) investigated the viability of using a proprietary pretreatment process on the bolts prior to installation and coating application, in order to minimize on‐site surface preparation without adversely affecting coating system adhesion or performance. 

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