Galvanized Wall Ties Frederick MD

Do wall ties need to be galvanized in solid masonry walls in Frederick? 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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Creede Bath & Home
(301) 748-6868
5010B Green Valley Rd
Monrovia, MD
 
RPD CORP t/a:
(301) 983-1111
PO Box111
Damascus, MD
Services
Drainage Correction, Stormwater Control,, Waterproofing, Masonry, Grading-Excavation, Structural Repairs, Foundation Repairs/Replacement, Basement Waterproofing, s

Cedarbrook Deck & Patio Inc
(410) 775-1444
10232 Fountain School Rd
Union Bridge, MD
 
A Cut Above Carpentry
(301) 824-7151
101 Irene Way
Smithsburg, MD
Services
Remodeling, Home improvement, Home repair, Hardwood and laminate flooring installation, carpentry, and much more
Awards
EPA Leadsafe Certified Firm, JD Power and Assoc.

BT Martin Contractors
(240) 529-5131
7130 Rock Creek Dr
Frederick, MD
 
Cordell Custom Homes and Remodeling
301-898-3386 or 301-606-1446
9455 Longs Mill Road
Rocky Ridge, MD
 
Archer Contractors
(301) 983-1111
PO Box 111
Damascus, MD
Services
Drainage

O'Dell Concrete
(717) 965-0901
12336 Coppermine Road
Union Bridge, MD
 
ABC Sales Inc.
(301) 447-6222
882 W. Main Street
Emmisburg, MD
Services
Out Door Landscape Supplies
Awards
MBE/DBE/SBE

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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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