Click Below Download KTA’s Free eBook on Painting Bolted Connections KTA President, Ken Trimber, delivers a compelling eBook filled with topics such as: Testing of Coatings for Use in Slip-Critical Bolted Connections Coefficient of Friction (COF) Testing Tension Creep Testing Classification of Slip Coefficient and Tension Creep Results 13 Frequently Asked Questions & Answers Additional […]
High-strength bolts have been used to assemble steel structures for over 60 years, supported by research conducted by the Research Council on Riveted and Bolted Structural Joints (RCRBSJ). RCRBSJ was founded in 1947 but is now known as the Research Council on Structural Connections (RCSC). Despite the long history of use, there is still confusion
Painting Bolted Connections for Bridges Read More »
The Minnesota Department of Transportation (MnDOT) conducted a one-day seminar on bridge maintenance painting strategy and project design in May of 2013. One outcome of that seminar was the realization that MnDOT needed a more uniform method to rate the condition of coatings statewide during biennial bridge safety (in conjunction with the new AASHTO Manual
MnDOT’s Approach to Improving Bridge Maintenance Painting Operations Read More »
As a group, coating professionals who deal mainly with industrial coatings generally focus on coating performance — the majority of concern being focusing on a coating’s ability to protect the substrate from the environment — and in the case of tank linings, to protect the tank contents from the substrate. Although these are certainly important
What You See Isn’t Always What You Get: The Problem with Aesthetics Read More »
Hot-dip galvanizing, as the name suggests, consists of dipping pieces of steel into a molten zinc bath. The molten zinc reacts metallurgically with the steel and forms four distinct layers growing outward from the steel surface. The layers consist of various alloyed combinations of zinc and iron beginning at the steel interface with a layer
Problems with Galvanizing Read More »
When conducting a coating failure investigation, the investigator’s first inquiries should be “What was supposed to be done,” and “Does it make sense?” The answers to these questions are typically revealed in the specification for the project. However, in this “Case from the F-Files,” there was very little information in the specification to guide the
Bridges, buildings, and other structures commonly include designed bolted connections of steel beams, girders, and other structural members using connection/splice plates of various sizes and configurations. High-strength bolts are used to secure the connections. The holes in the steel members and the connection/splice plates are larger (typically 1/16–1/8 of an inch larger) than the bolt