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*The Angi rating for Structural Engineering companies in Castlewood, SD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Structural Engineering needs.

*The HomeAdvisor rating for Structural Engineering companies in Castlewood, SD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Structural Engineering needs.

Last update on January 09, 2026

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Avatar for EHM

EHM

4.50(
16
)

EHM

4.50(
16
)
Customers say: Quality work
72 years of experience

EHM is a structural moving and elevating company that also specializes in foundation repair and replacement. We have been working in the Midwest since the Great Floods of 1993. We specialize in severely comprised foundation issues. We can elevate, level, pier or replace a wall or your entire foundation. We do not do mudjacking, waterproofing or minor crack repair.

"I did not get the service that we originally talked about I am very unhappy"

Donna S on August 2021

EHM is a structural moving and elevating company that also specializes in foundation repair and replacement. We have been working in the Midwest since the Great Floods of 1993. We specialize in severely comprised foundation issues. We can elevate, level, pier or replace a wall or your entire foundation. We do not do mudjacking, waterproofing or minor crack repair.

"I did not get the service that we originally talked about I am very unhappy"

Donna S on August 2021

SMOLEY ENGINEERS & CONSULTANTS

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SMOLEY ENGINEERS & CONSULTANTS

No reviews yet
27 years of experience

Multi-faceted planning, engineering and consulting firm, specializing in structural engineering for wood design, masonry, steel & concrete, green design, and wind engineering, serving architects, engineers, contractors, builders, developers, and owners from many business sectors. Practice areas include residential, office, retail, commercial, and industrial markets. Currently licensed as a Professional Engineer in PA, MD, WV, VA, DC, NC, & SC. Member ASCE, SEI, AWC.

Multi-faceted planning, engineering and consulting firm, specializing in structural engineering for wood design, masonry, steel & concrete, green design, and wind engineering, serving architects, engineers, contractors, builders, developers, and owners from many business sectors. Practice areas include residential, office, retail, commercial, and industrial markets. Currently licensed as a Professional Engineer in PA, MD, WV, VA, DC, NC, & SC. Member ASCE, SEI, AWC.

Structural Engineering questions, answered by experts

According to the Earthquake Country Alliance—a public and private alliance in California that works to improve earthquake and tsunami readiness—reports that unreinforced masonry, such as stone, bricks, and hollow clay tiles, is more susceptible to earthquake damage. The mortar between bricks isn’t as stable as other building materials and methods.

A 4-inch-thick concrete slab can support around 4,000 pounds per square foot if a contractor reinforces the slab with rebar, while that same slab without reinforcements will support closer to 1,000 pounds. For the purposes of a patio, 4 inches in thickness without reinforcement should suffice unless you’re installing heavy kitchen equipment or a hot tub on it. In those cases, reinforcing your slab and sticking with 4 inches of thickness should provide plenty of strength.

Yes, unresolved damage can decrease property integrity and market value.

The depth of any foundation style depends on your climate and how deep the frost line is, as building code requires that the footers of a foundation—which are built into a monolithic slab—sit at least a foot below the frost line. At the southern tip of Florida, for example, a monolithic slab foundation would only need to sit 12 inches under the soil at the widest parts. On some parts of the Canadian border, the frost line is 100 inches, which would mean a minimum of 112 inches, which is prohibitively deep for a monolithic slab.

If you’re building new construction or adding onto your existing home, hiring a structural engineer is not only worth it but it’s probably required by your local building department. Structural engineers will ensure you aren’t making your home unsafe in the building process, which is crucial from a safety perspective but also a legal one. It’s also worth hiring a structural engineer if you’re making changes to structural components, like removing a load-bearing wall.

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