Aerosol paints (also referred to as spray paints), like other paints are used for both protection and aesthetics; however, they differ from conventional paints due to their unique atomization/ application method and the container used to both store and apply the paint. The concept and the design may seem simplistic to the do-it-yourself consumer, but […]
Aerosol Paint – Technology and Testing Read More »
Introduction Occupational lead exposure continues to be an important health concern in the United States. Based on the number of Occupational Safety and Health Administration (OSHA) citations over recent years, there appears to be significant issues related to lead paint management, as well as other safety and health concerns at shipyards across the country. In
Lead Paint Management Issues in Shipyards Read More »
Steel beams used for bridge and highway structures are frequently curved to accommodate the design of a structure. This can be accomplished by cambering or sweeping. Cambering is the curving of a beam about the strong axis of the member, while, sweep applies to the curving of a member about the weaker axis. Cambering is
Cambering: Cold Versus Heat for Steel Bridge Beams Read More »
[interact id=”6041306635050f0017dae9f6″ type=”quiz” mobile=”false”] SSPC: The Society for Protective Coatings and NACE International (The merged organization is known at the Association for Materials Protection and Performance, or AMPP) has volunteer technical committees made up of subject matter experts that develop consensus standards that are drafted, balloted, approved, and published. Once published, these industry standards can
Test Your Knowledge on Surface Preparation & Abrasive Blast Cleaning Standards Read More »
Introduction Abrasive blast cleaning refers to the operation of forcibly propelling a high-pressure stream of abrasive material against a surface to remove existing materials and impart a surface profile. There are several variants of the process such as bead, sand, or shot blasting. Abrasive blast cleaning systems typically include an abrasive hopper (blast pot), a
Abrasive Blast Cleaning Hazards Read More »
Epoxy coatings are some of the most widely used materials in industrial and marine environments. Epoxy materials typically have excellent adhesion, chemical resistance and water resistance, which make them first-rate candidate coatings/linings for these environments. Epoxies are formulated as two component materials, with one component housing an epoxy resin and the other component containing a
The Formation of Amine Exudate (Blushing) of Epoxy Coatings Read More »
This podcast is related to measuring dry film thickness using two different techniques; one where you just take spot measurements, and the other where you use scanning probes. John Todd discusses the traditional methods of individual readings. John was previously a contractor with a great deal of hands on field experience with the dry film
KTA Podcast #6 – Dry Film Thickness Measurement: Scanning Probe vs. Standard Probe Read More »
Introduction Each year Liberty Mutual Safety Index ranks the top 10 causes of the most serious, nonfatal workplace injuries by their direct cost. The top ten leading causes in the 2017 index account for $49.9 billion, or 83.4% of the total $59.9 billion. Slips, trips, and falls are in the top ten and account for
Preventing Slips, Trips and Falls in the Workplace Read More »
The following is a guideline for witnessing and verifying qualification testing of Welding Procedure Specifications (WPS) according to the AASHTO/AWS D1.5-2015 Bridge Welding Code. The guidelines identify what the third-party inspector is required to do when witnessing a test, what the inspector can do to facilitate the process for the fabricator and the reviewer, and
Guidelines for Witnessing Welding Procedure Qualification Testing Read More »
When a large-scale bridge is in need of significant reconstruction, many factors should be considered prior to initiation of the project. Part of this particular reconstruction involved repainting of the structural steel on a 40-foot-wide lift bridge that had a total length (including approaches) of 2,877 feet, with a main span of 418 feet. The
Investigating Failure: Considerations for Reconstruction of a Bridge Exhibiting Staining Read More »
