Volume 7, Issue 1

Life-Cycle Cost of HDG Steel in Parking Garage Applications

Hot-dip galvanized steel is making its way into the parking garage industry by providing superior corrosion protection for a variety applications. Historically, concrete has been used for parking structures, but before now, there was little information to rebut the argument that "concrete is less expensive than steel."

The American Galvanizers Association (AGA) researched several sources and discovered some interesting information pertaining to the cost of concrete and steel used to construct parking garages/structures. This is not to imply this information is applicable to all concrete construction, (bridges, poles, etc.) but it is an indicator hot-dip galvanized steel is a viable alternative to concrete in parking structure design. As a matter of fact, Parking Today magazine reports there was a 33% growth in 2006 over 2005 in the construction of steel parking garages. > MORE

Related Information:
 

Parking for the Future
This attractive booklet features information about the corrosion problem of bare steel in concrete and highlights 7 HDG steel parking garage applications. 		  IPI 2007
Visit the AGA at Booth 605 at the
2007 International Parking Institute (IPI) Conference & Expo.
May 20 - May 23, 2007
Tampa, FL

 

 

 

Q: When designing a project, what should the clearance hole diameter be if a hot-dip galvanized bolt is to be placed in the hole?

A: Hot-dip galvanizing (HDG) of steel produces a corrosion-inhibiting, abrasion-resistant zinc coating that increases the diameter of a bolt and decreases the diameter of a clearance hole. In order to permit proper assembly, clearance holes must be sized to accommodate the decrease in the diameter of the holes and avoid having to clean out excess zinc before the HDG bolt can be installed.

The usual practice for a clearance hole using a hot-dip galvanized bolt is to oversize the hole according to the American Institute of Steel Construction (AISC) guidelines in the Load & Resistance Factor Design (LRFD) manual. In Table 1, the formulas used for determining both the standard (used for black bolts in clearance holes) and oversized (used for HDG bolts, except as detailed for slip-critical connections) clearance hole diameters are listed, as well as specific values for nominal bolt diameters using the equations provided. > MORE

 


The AGA is a non-profit trade association focused on providing education and technical support for architects, engineers, and specifiers. For more information about the AGA, visit www.galvanizeit.org. Out of respect for your privacy, we do not sell or rent our lists with any other parties. If you do not wish to receive Galvanizing Insights, you may cancel your complimentary subscription by using the link below.


This official publication of the American Galvanizers Association, Inc. (AGA) does not necessarily reflect the view of the board of directors or AGA members. Every effort is made to ensure accuracy. Any errors are strictly accidental and may be corrected in a subsequent issue. This material provides general information only and is not intended as a substitute for competent, professional examination and verification as to suitability and applicability. The publication of the material herein is not intended as a representation or warranty on the part of the AGA. Anyone making use of this information assumes all liability arising from such use. Questions or comments about this publication should be directed to the AGA. Comments and suggestions are encouraged.

Copyright © 2006 American Galvanizers Association. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel. This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. The information provided herein is not intended as a representation or warranty on the part of the AGA. Anyone making use of this information assumes all liability arising from such use.