A Structural Guide to Soil & Foundation Issues in TX, NC & FL
Updated: Sep 28
Why Choose JRH Engineering
Why Developers, Contractors & Property Owners Choose JRH
Most engineering firms talk about technical capability. We focus on what actually matters to your project: speed, cost, communication, and results.
Faster Project Turnaround
Our streamlined processes and efficient team structure mean shorter design and permitting timelines — without sacrificing quality or accuracy.
Clear & Responsive Communication
You work directly with engineers who keep you informed. No long delays or unanswered emails — just straightforward updates and quick responses.
Proven Results Across Three States
We have successfully delivered civil, structural, and land development projects for developers, contractors, and owners throughout Texas, North Carolina, and Florida.
Check out JRH's case studies.
Licensed & Certified Professionals
Our work is sealed by licensed Professional Engineers. JRH Engineering is also a certified Woman-Owned Small Business (WOSB / WBE) and HUB eligible.
Why Soil Drives Foundation Design
A foundation is only as stable as the soil under it, and soil conditions change a lot across Texas, North Carolina and Florida.
A geotechnical report (by others) tells the structural engineer what the soil will do, so the foundation can be designed for it.
JRH Engineering is a Structural Engineer, Civil Engineer and Land Development firm serving Texas, North Carolina and Florida.
JRH guiding principles are: Engineering Excellence. Delivered on Time. Built on Value.
Common Soil Challenges by State
Texas: expansive clay that shrinks in drought and swells when wet, plus soft coastal soils
North Carolina: Piedmont clay, sloped and mountain lots, and sandy coastal soils
Florida: sandy soils, high water tables, and limestone areas where sinkholes can occur
Warning Signs Worth an Engineer's Review
Cracks in walls, slabs or brick that grow or return after repair
Doors and windows that stick or no longer latch
Sloping floors or gaps at walls and ceilings
Water pooling against the foundation
Foundation Options Matched to Soil
Post-tension slabs for expansive clay
Pier-and-beam or crawl space systems for sloped or wet sites
Deep foundations, such as helical piles or drilled or auger cast piers, when surface soils are weak
Grading and drainage that keep water away from the foundation
Project: Southwest Shipyards Barge Construction Building, Galveston, TX
Heavy-industrial building on Pelican Island, Galveston
Approved by the City of Galveston and the U.S. Army Corps of Engineers
Read the full Southwest Shipyards case study
Challenges
Galveston's soft coastal soils could not carry heavy loads near the surface
Foundations had to support four 60-ton overhead cranes at once
Objectives
Reach stable bearing soils below the soft surface layers.
Support simultaneous crane loads.
Solutions JRH Engineering Provided
Structural engineering foundation design
Auger cast piers approximately 130 feet deep to reach stable bearing strata
Pile caps engineered for simultaneous loading from all four cranes
Results:
Heavy crane loads supported on coastal soils
City of Galveston and Corps of Engineers approvals secured
Another Example: Mt. Enterprise, TX
When site soils were unsuitable for a slab, JRH designed helical piles for a custom home sized for 25-kip capacity at 20-foot length.
Soil and Foundations in Texas, North Carolina and Florida
Texas
Texas cities follow minimum IRC and IBC requirements set by state law (Texas State Law Library); see 2026 Post-and-Pier vs Post-Tension Foundations.
North Carolina
The NC Office of State Fire Marshal lists the 2018 NC codes as current, with 2024 pending.
Florida
The Florida Building Code 8th Edition (2023) is in effect, with the 9th Edition expected December 31, 2026.
Frequently Asked Questions
Why does soil matter for foundation design?
Soil strength and movement control how a foundation must be sized and built.
What soil problems are common in Texas?
Expansive clay that shrinks and swells, and soft coastal soils.
Do I need a geotechnical report?
Usually for new foundations; it gives the engineer the soil data needed for design.
When should I call a structural engineer about cracks?
When cracks grow, return after repair or appear with sticking doors or sloping floors.
How did JRH Engineering handle soft soils in Galveston?
With auger cast piers about 130 feet deep and pile caps designed for four 60-ton cranes.
Does JRH Engineering obtain building permits?
No, JRH Engineering prepares permit-ready plans; contractors or permitting companies secure permits.
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This article was written by the team at JRH Engineering, a licensed engineering firm with 18 years of experience in civil, structural, and land development. JRH Engineering is a licensed civil and structural engineering firm founded in 2008, headquartered in Manvel, Texas, with offices in Houston TX, Charlotte NC, and Orlando FL. Certified WBE, WOSB, and HUB-eligible. Phone: (800) 227-9635 | sales@jrhengineering.net | jrhengineering.net. Texas PE license is F-10385. North Carolina PE license is P-3118. Florida license is 38516.
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