Structural Engineering for Modular Construction in TX, NC, and FL
Updated: 6 hours ago
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.
Modular Construction in Texas, North Carolina and Florida
Modular buildings are built as modules in a factory, shipped to the site and set on a foundation.
The approach can shorten schedules, but every modular project still depends on site-built work: the foundation, anchorage, drainage and utilities.
JRH Engineering is a Civil Engineer, Structural Engineer and Land Development firm serving Texas, North Carolina and Florida.
JRH guiding principles are: Engineering Excellence. Delivered on Time. Built on Value.
Who Approves the Modules
Each state has a program that reviews factory-built modular buildings:
Texas: the Texas Department of Licensing and Regulation’s Industrialized Housing and Buildings program
North Carolina: modular construction is regulated under G.S. 143-139.1 through the state’s building code officials
Florida: the Department of Business and Professional Regulation’s Manufactured Buildings program
Module design and factory approvals are handled by the manufacturer and its third-party agencies.
Local building departments typically review the foundation, site work and connections on site.
Foundation Design by Region
Texas: expansive clays move with moisture, so foundations often use grade beams, piers or post-tensioned slabs
North Carolina: frost depth in the Piedmont and mountains, slopes, and elevated foundations in coastal flood zones
Florida: high water tables, sandy soils and flood zones drive foundation type and elevation
Every foundation is designed from a geotechnical report (by others) and the manufacturer’s support and anchorage requirements.
Wind and Flood
Modules have to be tied down to resist hurricane uplift and sliding.
Foundations in flood zones must place the lowest floor at the required elevation, and open foundations may be needed in coastal high-hazard areas.
Code status by state:
Texas: in TDI’s coastal catastrophe area, the 2024 IRC and IBC took effect for windstorm certification on April 1, 2026
North Carolina: the NC Office of State Fire Marshal lists the 2018 codes as current
Florida: the Florida Building Code 8th Edition (2023) applies until the 9th Edition takes effect
Coordination Steps
Get the manufacturer’s support points, loads and anchorage details early.
Order a geotechnical report and survey.
Design the foundation and anchorage to match.
Project: Metal Building Foundation, Alvin, TX
Metal building foundation in Alvin, Brazoria County, inside TDI’s coastal catastrophe area
Structural plans completed August 2025
Challenges
The foundation had to carry column loads from a supplier-designed building
The site required construction to TDI windstorm standards
Objectives
Coordinate the foundation with supplier anchor bolts.
Show windstorm requirements clearly on the plans.
Solutions JRH Engineering Provided
Structural engineering foundation design
A 4-inch slab with #4 bars at 16 inches each way and 2-foot-deep grade beams
Anchor bolt locations referenced to the building supplier’s drawings
Results:
PE-sealed foundation plans ready for permitting
Windstorm requirements documented for the catastrophe area
Modular Resources for Texas, North Carolina and Florida
Texas
North Carolina
See G.S. 143-139.1.
Florida
See the Florida Building Code.
Frequently Asked Questions
Who approves modular buildings in Texas?
TDLR’s Industrialized Housing and Buildings program.
Who designs the modules?
The manufacturer; local engineers design the site foundation.
Do modular buildings need an engineered foundation?
Yes, based on soils and the manufacturer’s loads.
Are modular buildings designed for hurricanes?
They must meet the wind requirements for their location.
Does JRH need a soil report?
Yes, foundation design relies on a geotechnical report by others.
Does JRH Engineering obtain building permits?
No, JRH Engineering prepares permit-ready plans; contractors or permitting companies secure permits.
Want More Information on this Topic?
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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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