Galvanized Wall Ties Hagerstown MD

Do wall ties need to be galvanized in solid masonry walls in Hagerstown? The steel used in concrete is typically not coated. Wouldn't solid masonry offer protection similar to that offered by concrete?

J E S Construction Inc
(301) 790-0446
6830-B Putman Rd
Thurmont, MD

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Martin's Lawn Care
(717) 593-0546
14122 Timothy Drive
Greencastle, PA
 
James J. Smith & Sons, Inc.
(717) 597-7446
136 East Madison Street
Greencastle, PA
 
Harnish Drywall
717-597-1064
134 E. Franklin Street
Greencastle, PA
 
Greencastle Bronze & Granite, Inc./A-1 Self Storage, LLC
717-597-4580
500 Buchanan Trail West
Greencastle, PA
 
Oliver Homes Inc.
(301) 797-0000
19733 Leitersburg Pike
Hagerstown, MD
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New Home Construction, Home Improvements
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Best Home Builder Washington County, Maryland
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National Association of Home Builders

Robert D. Miller Painting
(717) 597-1247
1105 Williamson Road
Greencastle, PA
 
Shelly & Witter, Inc.
(717) 597-4433
11142 Williamsport Pike
Greencastle, PA
 
Blair Home Services
717-597-9209
2444 McDowell Road
Greencastle, PA
 
Columbia Builders, Inc.
800-694-9052
878 Joy Drive
Greencastle, PA
 
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Galvanized Wall Ties

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Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: October 1, 1998

Do wall ties need to be galvanized in solid masonry walls? The steel used in concrete is typically not coated. Wouldn't solid masonry offer protection similar to that offered by concrete?

There is a substantial difference between the protection to steel offered by masonry and that offered by concrete. In concrete, the fluid cement paste completely covers the bars. In masonry, the steel is often dry-laid on the units and the mortar placed on the top. Therefore, the bars are not always encased completely in mortar. Sometimes there are voids along the bottom of the bars, which can allow condensation and moisture to accumulate. The corrosion potential of the steel is also affected by material porosity and diffusion rates of harmful ions (such as chlorides). Bare steel is protected initially by a passivating layer that forms in the highly alkaline environment of wet concrete or mortar. Carbonation will reduce the alkalinity of the mortar or concrete and eliminate this protection. Mortars, being more porous than concrete, will carbonate at greater rates. There is also greater potential for diffusion from chloride ions from acid cleaning or other sources. Depending on their concentration, chloride ions will eliminate the pacifying effect of the mortar. For these reasons, unprotected steel encased in mortar will have an increased corrosion potential at a young age. Requirements for concrete or mortar cover...

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