ICC-ES AC358 addresses the corrosion protection of steel helical piles by establishing specific mandates for material thickness and coatings based on three distinct soil corrosivity categories. These requirements ensure the structural integrity and long-term durability of the foundation in various environmental conditions.
The protection strategies for each category include:
By following these thresholds, the AC358 standard ensures that helical piers resist section loss over time, preserving the load path from the structure to the bearing stratum.
Distinguishing between normal settling and serious foundation movement involves looking at the size, direction, and surrounding symptoms of the cracks. While minor hairline cracks are a common part of a home’s “bedding-in” process, specific patterns often indicate a deeper structural…
In a new build, diagonal drywall cracks above door frames are a common occurrence, but their significance depends on their size and behavior. During the first year, framing lumber naturally dries and shrinks, and the foundation undergoes a “bedding-in” process.…
Seeing cracks in a brand-new home can be concerning, but it is important to distinguish between normal settling and structural distress. In new construction, framing lumber naturally dries and shrinks over the first year, which can produce minor hairline cracks.…
Diagonal drywall cracks above door frames are a classic indicator of differential foundation settlement. These cracks typically form at the upper corners of door frames—which are natural structural weak points—when one part of the foundation sinks or shifts more than…
When restoring foundations that are a century old or more, stabilization methods must balance modern engineering with historic preservation standards. The most effective methods include: Before selecting a method, it is vital to have a structural engineer foundation inspection to…