What Engineering Drawings Do I Need for a Metal Building Permit?

What Engineering Drawings Do I Need for a Metal Building Permit?

Most building departments want three things for a pre-engineered metal building: sealed structural drawings for the building itself, a sealed foundation design prepared for that specific building and soil, and a site plan showing where the structure sits on the property. Many jurisdictions also ask for the structural calculations, an anchor bolt plan with the building reactions, and — depending on how the space will be used — architectural, energy, accessibility, and MEP (mechanical, electrical, plumbing) drawings.

The part that surprises most first-time buyers is that these documents rarely come from one source. The metal building package covers the steel. The concrete under it, the site work around it, and the interior systems inside it are normally designed and sealed by other professionals.

Requirements are set locally. Two counties in the same state can ask for different documents, and rural or agricultural projects sometimes fall under reduced requirements. The list below is what to expect and what to ask about — not a guarantee of what your reviewer will accept.

Do You Need Engineered Drawings for a Metal Building?

In most permitted projects, yes. If the structure needs a building permit, the reviewer generally needs engineered structural documents showing the building was designed for the loads required at that address.

There are exceptions. Some jurisdictions exempt small accessory structures below a size threshold, and some states have agricultural-use exemptions. Those exemptions are narrow, they differ from place to place, and they often disappear the moment the building has an occupancy, plumbing, or a business use.

Even where the permit office does not require engineering, lenders and insurance carriers frequently do. If you plan to finance the building or insure it as a commercial asset, assume engineered documents will be requested at some point.

What Is Included in a Metal Building Engineering Package?

A typical metal building engineering package covers the steel system the manufacturer supplies: primary framing (columns and rafters), secondary framing (purlins, girts, eave struts), bracing, roof and wall panels, connections between those members, and the structural calculations behind them.

It normally also includes the design-criteria block — the summary of code year, design wind speed, exposure category, ground and roof snow load, roof live load, risk category, seismic design category, and any collateral load the frame was designed to carry. That block is the single most useful page in the set, because it is how a reviewer confirms the building matches the site.

Alongside the drawings you usually receive an anchor bolt plan and a reactions table. Those two documents are not the foundation design; they are the inputs the foundation engineer needs to produce one.

What is normally outside the package: foundation and slab design, site and civil work, grading and drainage, architectural plans, energy code compliance, fire protection, and MEP. Scope varies by manufacturer and by what you purchase, so confirm inclusions in writing rather than assuming.

Do Metal Building Drawings Need a PE Stamp?

For most permitted buildings, yes — the structural documents need to be signed and sealed by a Professional Engineer (or, in some cases, a registered architect) licensed in the state where the building will be erected.

Licensure is granted state by state, so a seal from an engineer licensed elsewhere generally will not satisfy the reviewer. This is also why the same building model ordered for two different states can require two different sealed sets.

Whether the seal must be a physical wet stamp or a digital signature depends on the jurisdiction. Some departments accept electronic submittals with digital seals; others still want signed paper copies. Ask before you print anything.

What Does a PE Stamp Actually Cover?

A seal covers the specific work that engineer performed, under the assumptions printed on the drawings — nothing more. It is a statement of professional responsibility for a defined scope, not a certificate that the whole project complies with every local requirement.

This matters in practice. A sealed metal building drawing set can be entirely valid while the foundation, the site drainage, the fire separation, and the accessibility path remain unaddressed. Reviewers routinely reject submittals that are technically well-engineered but incomplete.

When you read a sealed set, look for three things: what the engineer designed, what assumptions they relied on (soil bearing capacity, for example, is commonly assumed rather than tested), and what they explicitly excluded. The exclusions are usually printed in the general notes and are the fastest way to see what you still owe the building department.

Does the Metal Building Engineer Design the Foundation?

Usually not. In standard industry practice the metal building manufacturer's engineer designs the steel and hands off reactions; a separate foundation or structural engineer designs the footings, piers, and slab.

The reason is straightforward: the foundation depends on the soil at your site, the frost depth, the water table, the local code, and how you intend to use the floor. None of that is known to a manufacturer sizing steel from a set of dimensions and load criteria.

Budget for foundation engineering as its own line item, and get it started early. Waiting until the steel ships is the most common way projects lose weeks.

What Is an Anchor Bolt Plan?

An anchor bolt plan is a dimensioned layout showing where every anchor bolt goes, how many there are at each column, and what diameter, projection, and embedment they require.

It is a setting document. The concrete contractor uses it to position bolts and templates before the pour, and the erection crew depends on those positions being correct to within a tight tolerance. Bolts set even slightly out of position can stop an erection crew cold and require field repair designed by an engineer.

An anchor bolt plan is not a foundation design. It tells you where the connection points are; it does not tell you how thick the footing is, what reinforcing it needs, or whether your soil can carry it.

What Are Building Reactions?

Reactions are the forces the building transfers into the foundation at each column base — typically listed as horizontal, vertical, and uplift values for each governing load combination.

Think of them as the building's demands on the concrete. Wind can push a frame sideways and lift a column upward at the same time, so a reactions table usually shows both downward bearing forces and uplift forces that the foundation has to resist through weight, depth, or reinforcement.

The foundation engineer cannot legitimately design your footings without them. If a supplier cannot tell you when reactions will be issued, that is a scheduling risk worth raising before you order.

Are Manufacturer Drawings Enough for a Building Permit?

Sometimes, but usually not on their own. Manufacturer drawings answer the structural question about the steel; a permit application is a broader package.

Common additions a reviewer may require: the sealed foundation design, a site plan showing setbacks and access, an energy code compliance path if the building is conditioned, accessibility details for public-use occupancies, fire-rating and separation details, and MEP plans where those systems are installed.

Some departments also handle metal buildings under a deferred-submittal process, where the building package is reviewed after the main permit application. Where that applies, the sequence and the responsible design professional need to be identified up front.

Why Are Metal Building Plans Site-Specific?

Because the loads a building must resist are a function of exactly where it stands. The design wind speed, ground snow load, seismic design category, and exposure category all change with location, and the code edition in force changes with the jurisdiction.

Geometry matters just as much. Width, length, eave height, roof slope, and the number and size of openings all change how wind acts on the structure, and a building with large open sides is treated very differently from a fully enclosed one.

Use changes the math too. Occupancy and risk category affect the importance placed on the structure, and added loads — mezzanines, cranes, sprinkler piping, ceiling systems, rooftop equipment, or future solar — must be declared before design, not after.

This is why a plan set drawn for one address should not be reused at another. Our companion guide on wind, snow, and live loads walks through how each of these criteria is set.

What Information Does an Engineer Need Before Designing the Building?

At minimum: the project address, the building's width, length, eave height, and roof slope, the intended use, and the locally adopted code edition with any amendments.

Beyond that, an engineer needs the design criteria the jurisdiction enforces — wind speed, exposure category, ground snow load, seismic parameters, and risk category — plus any collateral load for items hung from the frame, the location and size of every framed opening, and whether the building will be enclosed, partially enclosed, or open.

Anything structural you plan to add later belongs in the conversation now. Mezzanines, cranes, lean-tos, canopies, and rooftop solar are far cheaper to design for at the start than to retrofit into a frame that was never sized for them.

For the foundation scope, add soil information. A geotechnical report or, at minimum, a documented allowable bearing pressure lets the foundation engineer design rather than assume.

What Documents Get Left Out of Permit Submissions Most Often?

The foundation design is the clear leader. Buyers assume the sealed building drawings cover the concrete, submit without a foundation package, and get a correction notice.

Close behind: soil data, the reactions table, a site plan with accurate setbacks and drainage, energy code documentation for conditioned buildings, and a clear statement of who the Engineer of Record is when multiple engineers contributed to the project.

A short pre-submittal conversation with the plans examiner usually prevents all of it. Most departments will tell you exactly what they expect if you ask before you apply.

Can Generic Metal Building Plans Be Used for a Permit?

Generally no. Stock or sample plan sets do not carry the design criteria for your address, and a reviewer has no way to confirm the building was engineered for local wind, snow, and seismic conditions.

Generic sets are still useful for planning — for understanding layout, clear height, and how framing works — but treat them as illustrations rather than submittal documents.

If a supplier offers plans without asking for your project address and intended use, that is a signal worth pausing on.

What Does Metal Building Engineering Cost?

Engineering for the steel package is usually bundled into the building price when it is provided, while foundation engineering is typically a separate professional fee. Pricing depends on building size, complexity, jurisdiction, and how much documentation the reviewer requires, so we do not publish a flat figure.

Costs rise when a project adds mezzanines, cranes, unusual openings, high wind or snow criteria, or a revision after the drawings are already sealed. Re-engineering after an order is placed is the expensive scenario — which is why confirming local requirements before ordering is the cheapest step in the entire process.

Ask any supplier to state, in writing, what engineering is included, what is excluded, how many revisions are covered, and who pays if the building department requires different design criteria than the ones the building was priced against.

What Should I Ask Before Ordering a Metal Building?

Start with your building department, not with a supplier. Ask which code edition is enforced, what design criteria apply at your address, what documents the submittal requires, and whether metal buildings are handled as a deferred submittal.

Then take those answers to the supplier and confirm the building is being priced and engineered against them. The checklist below is the version we walk through with customers.

North Point Steel helps customers plan, configure, source, and deliver pre-engineered steel buildings, with project-specific engineering provided through qualified engineering and manufacturing partners. We do not issue permits or approve plans, and we will always tell you where our scope ends and local design responsibility begins.