Ground Anchors vs. Concrete Anchors for Metal Buildings

People often toss around the word "gauge" when discussing metal buildings, but few stop to consider what it really means. For steel, its gauge is a system of determining how thick it is. The smaller the number, the thicker the material.

What Is Gauge?

Most metal buildings utilize 14-gauge steel for their framing. It’s light, sturdy, and can hold its own in most scenarios. However, some environments with higher wind speeds and snowfall demand thicker 12-gauge framing to carry the load and pass local building requirements.

And while you might not notice much of a difference in performance at first, that beefier framing makes it a lot harder for nature to bend or twist your structure out of shape.

Key Highlights

• 12-gauge = thicker and stronger
• 14-gauge = good for most small to mid-size builds
• Lower gauge = better wind and snow performance
• 12-gauge holds shape longer under stress
• Often comes with a better warranty
• Price bump is small compared to the upgrade in strength

Steel Gauge Chart

Gauge	Inches	Millimeters
8	0.164 in	4.17 mm
10	0.135 in	3.43 mm
12	0.105 in	2.67 mm
14	0.075 in	1.90 mm
16	0.060 in	1.52 mm
18	0.048 in	1.21 mm
20	0.036 in	0.91 mm
22	0.030 in	0.76 mm
24	0.024 in	0.61 mm
26	0.018 in	0.46 mm
28	0.015 in	0.38 mm
30	0.012 in	0.30 mm

How Gauge Impacts Loads

Thicker framing doesn’t just sound tougher. It is tougher. Heavier steel stands up better to snow buildup, hard gusts, and the added stress from longer spans.

Engineers run the numbers for wind and snow loads based on ASCE 7 standards. Using this system, buildings can be rated for anywhere from 115 to 170 mph winds and 20–60 psf snow loads.

The local requirements for wind and snow loads depend on location, open exposure, and roof pitch. For example, a building sitting on a hill or near the coast deals with more pressure than one behind trees.

Upgrading to 12-Gauge Framing

At what point should you consider upgrading?

• High Wind Speeds

If your metal building will sit in an area with high wind speed calculations, you may need to upgrade to thicker framing to prevent swaying or failure.

• Heavy Snow Regions:

If you expect to see your fair share of deep snows this winter, upgrading your framing thickness is a smart move.

• Longer, Bigger Buildings:

Longer spans put more stress on the frame of your pre-engineered metal building.

• Certification Needs

Higher wind or snow ratings often call for thicker 12-gauge.

• Lower Maintenance:

Thicker steel can last longer and require fewer repairs over the course of its life.

Cost and Warranty Changes with Framing Upgrades

You can expect a small price increase when you upgrade from 14-gauge to 12-gauge framing. You pay for thicker steel, heavier anchors, and reinforced braces to match it. Usually, you’re looking at around 10–15% more on the framing side.

However, that extra spend often gets you a longer rust-through warranty, sometimes 25 years instead of 20. The thicker galvanizing takes longer to wear down, especially in damp or coastal areas.

So, while the up-front cost stings a little, you’re getting fewer repairs, less movement, and a frame that won’t quit early. In the long run, it’s usually worth every bit.

Frequently Asked Questions about Framing Gauges for Metal Buildings

Do you have questions about framing gauge, and which thickness is best for you? Below, we’ve answered some of the questions we see on this subject the most:

Is 12-GA stronger than 14-GA?

Answer: Yeah. It’s thicker, heavier, and stiffer under load.

What’s the real thickness difference?

Answer: 12-ga steel is about 0.1046 inches thick, while 14-ga runs around 0.0747 in.

Does 12-GA automatically mean better wind or snow ratings?

Answer: Not by itself. The full design, including anchors, trusses, and layout, plays a role. But thicker framing helps you hit higher numbers.

Does the 20-year rust warranty only cover 12-GA?

Answer: Usually, the heavier gauge gets longer coverage. Some 14-ga options still offer 20 years, but 12-ga often goes a few years beyond that.

Most people don’t really think about anchors when they’re shopping for a metal building. It’s usually size, price, maybe the roof style, and then everything else. Anchors come up later, when the building is already in motion. But they matter more than most expect.

Metal building anchors are basically what tie the structure to the ground. That might mean into soil using ground anchors, or into a concrete slab using bolts and embedded hardware. Either way, they’re what keep the building from shifting when wind picks up or the ground moves a little.

Key Takeaways

• Anchors are what actually hold the building in place, not just the framing.
• Ground anchors go straight into soil and are often used for smaller buildings.
• Concrete anchors tie the structure into a slab for a more permanent setup.
• Bigger buildings usually lean toward concrete, even when ground anchors are possible.
• Site prep matters more than people expect, especially with ground installs.
• Local codes can override your preference pretty quickly.
• The right anchor is not one-size-fits-all. It depends on use, location, soil, and building size.

Why Anchor Types Matter

Ground anchors and concrete anchors do the same basic job, just in very different ways. One relies on soil resistance. The other locks into a solid slab. On paper that sounds simple, but in practice it changes how the whole building behaves over time.

Weather resistance

• Wind is usually the real reason anchors matter.
• A properly anchored building moves less during storms.
• Concrete tends to feel more rigid in high-wind zones.
• Ground anchors can still perform well, but soil conditions play a bigger role.

If wind, snow, or code requirements are part of your decision, check your local snow and wind loads before choosing your building package. You can also use the ASCE Hazard Tool as a third-party reference for site-specific design hazard data.

Structural stability

• Concrete gives a more fixed base overall.
• Ground systems depend heavily on installation quality and soil type.
• Larger frames naturally put more demand on the anchor points.

Long-term performance

• Concrete usually stays more consistent year after year.
• Ground systems can shift slightly if the soil changes over time.
• Drainage, erosion, and settling all come into play eventually.

Planning a building for wind, snow, or heavy equipment? Design your building online, then talk with our team before you finalize the anchor and foundation setup. Design Your Building online or call 208-572-1441.

Ground Anchor Installation

Ground anchoring is usually the simpler route. It’s faster, and in a lot of cases it’s the most practical option depending on the building size. Instead of pouring a slab, the structure is secured directly into prepared soil using engineered anchor systems.

It’s common for smaller garages, metal carports, and storage buildings. Not because it’s weaker, but because it fits those use cases better.

How we install ground anchors

Our installation crew secures the frame using anchor systems designed for the specific structure. These are placed according to the building layout so the load is distributed evenly.

It’s not random placement. There’s a pattern to it based on engineering specs, wind rating, and frame size.

Site prep the buyer is responsible for

Before installation, the customer needs to make sure the site is ready. Review our site preparation guide before your install date so grading, drainage, access, and foundation decisions are handled early.

That usually means:

• Clearing the area so equipment can access it.
• Getting the ground reasonably level.
• Removing large rocks, roots, or debris.
• Handling any major grading or drainage issues beforehand.

If the site is uneven, everything else becomes harder than it needs to be.

Pros and cons of ground anchoring

Pros

• Lower upfront cost compared to concrete.
• Faster installation timeline.
• Works well for smaller buildings and carports.
• Easier if the building may ever be moved or changed.

Cons

• Not always ideal for large or heavy structures.
• Soil conditions can affect performance.
• Some counties won’t allow it for permanent buildings.

Concrete Anchor Installation

Concrete anchoring is a different setup entirely. Instead of working with soil, the building is secured to a poured slab that becomes the base of the structure. It’s more permanent, and honestly, it’s what most people picture when they think of a finished metal building.

It takes more planning upfront, but it also gives a more rigid foundation.

How we install concrete anchors

The building is anchored into the slab using specialized concrete bolts. Everything lines up with the slab layout, so accuracy matters.

Site prep the buyer is responsible for

Important detail here: we do not pour concrete slabs. That part has to be handled separately through a local concrete contractor before installation is scheduled.

The slab should be:

• Fully poured and cured.
• Level across the entire footprint.
• Sized correctly for the building dimensions.
• Built with anchor placement in mind.

For general concrete curing background, this concrete curing guidance from FHWA is a useful reference, but your concrete contractor should confirm the right timing for your slab, mix, weather, and project.

If that step is rushed, it usually causes delays later.

Pros and cons of concrete anchoring

Pros

• Strongest long-term stability.
• Best option for permanent buildings.
• Cleaner finished floor surface.
• Often preferred for permitted structures.

Cons

• Higher total project cost.
• Requires coordination with a separate contractor.
• More upfront planning before installation.

Ground vs. Concrete Anchors: Side-by-Side Comparison

Category	Ground Anchors	Concrete Anchors
Stability	Good for smaller builds	Higher rigidity overall
Cost	Lower upfront cost	Higher due to slab
Site Prep	Basic grading and clearing	Full concrete slab required
Permit Likelihood	Depends on jurisdiction	More commonly required
Long-term durability	Depends on soil conditions	More consistent over time

Permit rules vary by city, county, and state. For general code background, the International Building Code is a useful outside reference, but your local building department has the final say for your project.

Does Building Size Affect Which Anchor Type Is Right for You?

Yes, and it usually becomes more obvious as the structure gets larger. A 12’x20’ or 20’x20’ metal garage doesn’t put the same load demands on the ground as something like a 30’x40’ metal garage or 40’x60’ workshop building. Once you get into those mid-to-large footprints, concrete starts to make more sense. Not just structurally, but from a permitting standpoint too.

For example:

• Smaller storage buildings can often work fine with ground anchors.
• Mid-size garages, like 24’x30’ or 30’x40’, depend heavily on use and local code.
• Larger shops or multi-bay buildings, 40’x60’ and up, are usually better suited for concrete.

At a certain point, it stops being about preference and becomes more about compliance and long-term stability. RV owners planning a bigger cover should also compare layouts like this 30x45 RV carport before deciding whether ground or concrete makes more sense.

Why Choose EMB for Your Next Metal Building?

We build a wide range of steel structures for residential, agricultural, and commercial use, including metal garages and commercial metal buildings. These buildings are engineered for durability and designed to meet regional weather requirements, including wind and snow load considerations where applicable.

Whether you’re planning a small storage unit or a larger workshop, the goal is the same: a structure that holds up over time without unnecessary complications.

If budget timing is part of the decision, review our metal building financing and Rent-To-Own metal buildings options before you finalize your building package.

If you’re unsure about anchor type or foundation setup, our team can walk through it with you based on your building size and location.

Need help choosing ground or concrete anchors? Call Engineered Metal Buildings at 208-572-1441 to get pricing and start planning your build.

Conclusion

Anchors don’t usually get much attention at the start of a project, but they end up being one of the most important decisions. They affect stability, lifespan, and sometimes even whether a project passes inspection in the first place.

Ground anchors and concrete anchors both have their place. The right choice comes down to how the building will be used, what it’s sitting on, and how permanent you want it to be. Once that’s clear, the decision usually gets a lot simpler.

Design Your Building online or call 208-572-1441 to talk through anchor options, site prep, certification, and pricing for your location.

So you’ve picked your metal building size, maybe even started picturing where it’s going to sit on your property. Then the permit question shows up, and it’s usually where things start to feel less straightforward.

Across the Western U.S., there isn’t one clean answer. Not even close. A setup that goes up easily in rural Montana might need engineered drawings, multiple approvals, and zoning checks in California. Even within the same state, rules can change from one county to the next.

This guide is here to help you get a realistic sense of what to expect, state by state, plus what “permit-ready” actually means when you’re ordering a metal building.

Key Things to Know Upfront

• Permit rules aren’t consistent across the West. Most states fall somewhere between 120 and 200 sq. ft. before permits kick in, but zoning and agricultural rules can change that quickly.
• California, Oregon, and Washington tend to be the strictest. That’s mostly due to seismic requirements plus snow and wind loads. Montana and Wyoming are on the opposite end. Some counties barely enforce permitting at all, especially in rural areas.
• Permit-ready isn’t just a marketing term. It usually means your building includes engineer-stamped drawings that match your local wind, snow, and seismic conditions.
• Enclosed or occupied buildings, including many metal garages, almost always get more scrutiny than open carports.
• If you’re unsure, we can provide stamped drawings when required. Just call 208-572-1441 before you order so you’re not guessing.

Not sure if your county needs stamped drawings? Call 208-572-1441 before you order. We’ll help you understand what details may be needed for your building size, location, and intended use.

Why Permits are Tougher Out West

The West deals with a mix of extremes you don’t always see elsewhere. Earthquakes, heavy mountain snow, high desert winds, and everything in between. That’s really what drives most of the rules.

Seismic zones change everything in coastal states

California, western Oregon, and western Washington sit near major fault systems, including the Cascadia Subduction Zone. That alone pushes stricter building standards.

Because of that risk, counties require structures to be engineered for lateral movement, basically, how a building holds up during shaking. That’s why stamped engineering drawings are so common in those areas.

If you’re building in places like the Bay Area, Puget Sound, or the Willamette Valley, expect a permit and expect engineering.

Snow And Wind Loads are Highly Local

In Colorado, some mountain counties can exceed 100 PSF snow loads. In Wyoming, wind is often the bigger issue than snow. In Arizona, it’s monsoon winds that catch people off guard.

These numbers directly affect how your building is designed and framed. That’s why certified metal buildings matter, as they’re built to match the exact load requirements for your site, not a generic average.

Agricultural Exemptions Exist, But Don’t Assume Them

Most western states do offer agricultural exemptions, but they’re not universal and they’re not automatic.

They usually apply only if:

• The structure is on actively farmed land
• It’s used for agriculture, such as metal barns, equipment storage, or livestock
• It’s not used as a residence, office, or commercial workspace
• It’s outside city limits or certain zoning areas

If you’re on farmland in places like eastern Washington or rural Nevada, it’s worth checking. Just don’t assume exemption until the county confirms it.

State-By-State Overview (Western U.S.)

This is a general snapshot. Counties can, and often do, override these baselines. You can also review our service areas to connect your project with the right state-level building context.

State	Permit Need	Typical Threshold	Main Design Concern	Ag Exemption
California	Almost always	Nearly all roofed structures	Seismic + coastal wind	Limited
Oregon	Yes	200+ sq ft	Seismic west / snow east	Yes (farm use)
Washington	Yes	200+ sq ft	Seismic + snow	Yes (qualified farms)
Arizona	Depends	200+ sq ft in cities	Wind + mountain snow	Yes (rural areas)
Nevada	Varies	County-based	Seismic west / snow north	Yes (rural)
Colorado	Yes	~120+ sq ft	Heavy snow loads	Yes (ag land)
Utah	Yes	200+ sq ft	Snow + seismic (Wasatch)	Yes
Idaho	Varies	Often exempt ag structures	Snow loads	Strong exemption
Montana	Often not required	Many rural areas unregulated	Snow loads	Yes
Wyoming	Limited	No statewide code	Extreme wind	Yes
New Mexico	Yes	County-based	Wind + elevation snow	Yes (rural)

A Closer Look at Each State

California

California is the most regulated state in the West. Between Title 24 and local amendments, nearly everything requires a permit if it has a roof.

Seismic rules drive most of it. Even simple buildings often need engineered drawings. Agricultural exemptions exist, but they vary a lot by county and aren’t always easy to navigate.

Oregon

Western Oregon deals with seismic risk, while eastern Oregon deals more with snow.

The state sets baseline rules, but counties enforce them differently. Agricultural exemptions exist for real farming operations, but you’ll want confirmation before assuming anything.

Washington

Western Washington is strict. Seattle, Tacoma, and surrounding counties require permits for most structures over 200 sq. ft.

Eastern Washington is less seismic but still sees heavy snow in certain regions.

Farm structures can qualify for exemption, but only if they’re actually used for agriculture.

Arizona

There is a big difference between metro and rural areas. Phoenix and Tucson-area counties enforce standard permit rules. Rural counties are far looser. Areas like Flagstaff must contend with snow loads.

Nevada

Clark County (Las Vegas) and Washoe County (Reno) follow stricter building codes.

Rural Nevada is much more relaxed, especially in agricultural zones. Still, “minimal regulation” doesn’t mean no regulation, so it’s worth confirming locally.

Colorado

Colorado is all about elevation. Mountain counties deal with extremely high snow loads, sometimes over 100 PSF. Front Range areas follow standard codes but still require permits.

Agricultural exemptions exist but only apply to legitimate farm use.

Utah

The Wasatch Front is the strict zone as Salt Lake City and nearby counties enforce strong seismic and snow load requirements. Rural counties are more flexible, but still follow basic safety standards.

Idaho

Idaho is popular for metal buildings because of its strong agricultural exemption. Many farm-related structures don’t require permits, but snow loads still matter for design.

Montana

Montana is one of the most relaxed states when it comes to permits, especially in rural counties. But snow loads are serious. Even without a permit requirement, engineering still matters here.

Wyoming

Wyoming has no statewide building code. Rural areas often have minimal oversight, but wind is the real challenge here. Some of the strongest sustained winds in the country happen in this state.

New Mexico

New Mexico varies a lot by region. Northern areas deal with snow, while the eastern plains deal with wind. Agricultural exemptions exist but depend on zoning and county rules.

Planning in a high-snow, high-wind, or seismic area? Call 208-572-1441 before choosing your final size. A short call can help you avoid building specs that do not match your county’s requirements.

What “Permit-Ready” Actually Means

A standard drawing just shows how the building is assembled. A stamped drawing means a licensed engineer has reviewed the design and confirmed it meets your local wind, snow, and seismic requirements.

Most counties won’t accept anything less for approval.

Risk Category II and Why It Matters

Most garages, barns, and workshops fall under Risk Category II. That just means the structure is expected to be occupied by humans and made to handle typical environmental loads safely.

Once a building is enclosed or regularly used, this classification almost always applies.

What We Provide for Certified Orders

When your project needs certification, we supply engineer-stamped drawings matched to your location’s specific requirements. Our metal buildings use 14-gauge framing and 29-gauge panels, with documentation prepared for permit submission when needed.

If you’re unsure what your county will require, call 208-572-1441 before ordering. It can save a lot of back-and-forth later.

Need a certified building example? Review the 20x20x12 Certified Building with Lean Tos, then call 208-572-1441 to discuss what your county may require before you order.

Questions to Ask Before You Buy

Before you order anything, it helps to get clarity on a few basics:

• Do I actually need a permit for this size building?
• Does my zoning allow agricultural exemptions?
• Will stamped drawings be required?
• Are there setback rules I need to follow?
• Any height restrictions?
• Can permits be submitted online?

Most counties can answer all of this in one quick phone call.

Final Thoughts

Permitting in the West isn’t uniform, and it probably never will be. The best move is always the same: check with your county before you commit to a size or layout.

Once you know your requirements, we can match the building to them, engineered, stamped, and ready for approval where needed.

Ready to get started? You can design your structure with the 3D Building Designer or call 208-572-1441 for more information on permitting requirements in your area.

Ready to plan your permit-ready structure? Use the 3D Building Designer to map out your building size and layout, then call 208-572-1441 if you need help with certified building options.