Carport Engineering and Canopy Design for Permits
Carport engineering and canopy design for steel kits, RV covers and commercial shade structures, sealed by a PE licensed in your state.
- Stamped by a PE licensed in your state
- Built to IBC, IRC and local amendments
- Plan-check comments answered
Open structures, designed for the forces that hit them hardest
A carport or canopy has a roof and columns but no walls, which makes it one of the most demanding structures for its size. Wind can get under the roof and lift it, push it sideways and try to pull the columns out of the ground, all at once. Snow piles on top. And unlike a house, there are no walls to share the load, so every force goes through a few slender posts into a few footings. That is why building departments so often ask for carport engineering before they issue a permit.
PE Engineer designs residential carports, RV and boat covers, steel kit carports, patio-style canopies, parking shade structures, entry and drive-through canopies, and fuel station canopies. Each design covers the roof framing, columns, connections, footings and anchors for the wind speed, exposure and snow load at your address, and is sealed by a PE licensed in the state where it is built.
We work with homeowners, carport dealers and installers, contractors and commercial property owners, and we quote a fixed fee, usually the same day.
What you receive
- Carport or canopy framing plan
- Column and beam sizes and connections
- Footing or anchor design and details
- Elevations with heights and clearances
- Design load summary for your site
- PE stamped calculations and drawings
Carports and canopies we design
Open structures come in many forms, and each one has its own weak point we design around.
Residential carports
Wood and steel carports, freestanding or attached to the house, sized for one or more vehicles with the clearance and post locations your driveway needs.
Steel kit carports
Cold-formed steel tube carports and garages from kit dealers, with site-specific footings and anchors when the dealer's standard drawings do not cover your loads.
RV and boat covers
Tall, long-span covers for RVs, trailers and boats, where height increases wind forces on the columns and the footings must resist significant overturning.
Commercial canopies
Fuel station canopies, drive-through and entry canopies, and loading dock covers, with steel framing, column bases and foundations designed to the IBC.
Parking and shade structures
Steel shade structures for parking lots, schools, playgrounds and outdoor seating, including cantilevered T and single-column designs that leave drive aisles clear.
Solar carport structures
Steel canopies built to carry solar panels, designed for the module weight, wind on the array and snow, with columns and footings coordinated with the electrical design.
Your Stamped, Permit-Ready Plans Start With One Upload
Send your drawings or describe the project. A licensed engineer reviews it and sends a clear, fixed-fee proposal, often within hours.
- Free and no obligation
- Reviewed by a licensed PE
- Secure file upload
Why carports and canopies need engineering
Building codes treat open structures differently from enclosed buildings because the wind acts on them differently. On a closed building, wind pressure on the walls and roof is partly balanced by internal pressure. On a carport, wind flows both over and under the roof. ASCE 7 has specific provisions for open buildings with monoslope, pitched and troughed free roofs, and the resulting net pressures, especially uplift, can be higher than many people expect.
Several other factors make these structures sensitive:
- Few columns. All of the roof’s gravity, uplift and lateral load goes through a small number of posts, so each one and its footing carries a large share.
- Cantilevered columns. Many carports have no diagonal bracing. The columns act as vertical cantilevers fixed at the footing, so the footing must resist overturning moment as well as vertical load.
- Snow and drift. A carport next to a taller house or garage can collect drifting snow that far exceeds the uniform roof snow load.
- Light materials. Thin steel tubing and light roofing are efficient but have little reserve when loads exceed what they were sized for.
Failures typically show up as roofs lifted off in windstorms, columns pulled out of the ground, or collapses under heavy snow. Proper design prevents all three, and the drawings give your inspector a clear way to verify the work.
Carport engineering for steel kits and custom structures
Steel kit carports are often sold with the manufacturer’s certified drawings, which show the structure designed for a stated wind speed and snow load. Those drawings are useful, but building departments frequently ask for more. The certified design may not match the wind speed, exposure or snow load at your address, the anchoring method may not suit your ground, or the jurisdiction may require site-specific footings sealed by an engineer licensed in your state.
Our carport engineering fills those gaps. We review the kit drawings against your site loads and either confirm them with calculations or specify upgrades such as closer post spacing, heavier gauge members, additional bracing or a different anchor. We then design the foundation, which is where most kit installations fall short.
Anchors and footings
Kit carports are often installed with rebar stakes, auger-type ground anchors or wedge anchors into an existing slab. Each has a limited capacity, and an existing driveway slab may be too thin or unreinforced to anchor into reliably. We check the anchor capacity against the uplift and overturning forces and, when needed, design concrete pier footings or a thickened slab edge with cast-in or post-installed anchors.
Custom wood and steel carports
For carports designed from scratch, we size the beams, rafters or purlins, columns and knee braces, design the connections at each joint and detail the footing for each post. Wood carports often look best with exposed timber, while steel makes slimmer columns and longer spans possible. We help you choose based on span, appearance and budget.
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- Free and no obligation
- Reviewed by a licensed PE
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Commercial canopies, shade structures and solar carports
Commercial canopies fall under the IBC and usually face more scrutiny than residential carports. Fuel station canopies cover large areas with few columns and often support lighting, signage and fire suppression equipment. Drive-through and entry canopies cantilever from the building or stand on a single row of columns. Parking lot shade structures commonly use single-column T or cantilever frames to keep drive aisles and parking stalls clear, which concentrates large overturning moments into each footing.
For these structures we design the steel framing to AISC 360 or AISI S100 for cold-formed members, detail the moment connections and base plates, and design drilled piers or spread footings for the combined vertical, uplift and overturning forces. Where columns are exposed to vehicles, we recommend bollards or other protection and note it on the plans.
Fabric shade structures and shade sails deserve special mention. Fabric tension creates large inward forces on the posts, and wind on a taut membrane adds more. Posts and footings for shade sails are often much larger than people expect, and we design them with that in mind.
Solar carports combine a parking canopy with a PV array. We design the steel canopy, purlins and foundations for the module weight, wind on the array and snow, and coordinate the racking attachment points with the PV layout. The electrical side is covered by our solar PV plans service, so the structure and the electrical design go to the building department as one coordinated package.
Attached carports, foundations and permit requirements
Attaching a carport to a house saves a row of posts but adds load to the house framing. We check the wall or roof framing where the carport attaches, specify a ledger or rafter connection, and make sure uplift on the carport roof does not pull on a fascia or gutter that was never meant to resist it. For a cover over a patio or deck rather than a driveway, our deck and patio cover engineering follows the same approach.
Codes also treat carports differently from garages. Under the IRC, a carport must be open on at least two sides; if it is enclosed beyond that, it may be treated as a garage, with different fire separation and other requirements. If you plan to add walls later, tell us early so the design accounts for it.
Permits for carports and canopies usually require:
- A site plan showing the structure’s location, setbacks from property lines and distance to other buildings.
- Structural drawings and calculations showing framing, connections and footings.
- The design wind speed, exposure category and snow load stated on the plans.
- Manufacturer data for kit components, if a kit is used.
Zoning rules on setbacks, height and lot coverage are separate from the building code and vary by city. We design the structure to fit the location you choose and flag anything that looks likely to conflict with typical zoning limits.
You likely need this if
- Your city requires a carport permit
- Kit drawings do not match your wind or snow
- You need anchors into an existing slab
- You are building a tall RV or boat cover
- You are adding a commercial canopy
- You want to attach a carport to your house
How it works, start to finish
From your first message to stamped drawings, you work directly with the engineering team.
- 1Share your projectSend the address, scope and any drawings, photos or plan-check comments. Two minutes is enough.
- 2Receive a fixed-fee proposalAn engineer reviews the scope and replies with a firm price and delivery date for your carports & canopies drawings.
- 3Engineering and draftingWe run the calculations and prepare drawings to the codes your jurisdiction enforces, checked before sealing.
- 4Stamped set deliveredYou receive a sealed PDF set ready to submit, and we answer any plan-check comments within scope.
Codes and standards for carports and canopies
Carports and canopies are designed to the code editions your jurisdiction has adopted and the standards for each material:
- International Building Code (IBC) and International Residential Code (IRC)
- ASCE 7, including wind provisions for open buildings with free roofs
- AISC 360 for hot-rolled and HSS steel framing
- AISI S100 for cold-formed steel carport members
- AWC National Design Specification (NDS) for wood carports
- ACI 318 for footings, piers and anchors into concrete
How licensing works. Engineering drawings must be sealed by a Professional Engineer licensed in the state where your project is located. PE Engineer works with a network of state-licensed PEs, so every set is reviewed and stamped by an engineer with an active license in the state where your project is located. Their name and license number appear on the seal, exactly as your building department requires.
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Does a metal carport need a permit?
In most cities and many counties, yes, especially for permanent carports anchored to the ground or a slab. Requirements depend on size, location and local rules. Some jurisdictions exempt small structures, but many still want engineering for the anchors or footings. We can check what your jurisdiction requires.
My carport kit came with certified drawings. Why does the city want more?
Certified drawings are designed for a specific wind speed, snow load and anchoring method. If your site has higher loads, a different exposure, or the city requires a foundation sealed by an engineer licensed in your state, the kit drawings alone will not be enough. We fill those gaps.
Can a carport be anchored without concrete footings?
Sometimes. Ground anchors can work for light carports in suitable soil where uplift is moderate. In high wind areas, loose or sandy soil, or for taller structures, concrete footings are usually needed. We calculate the forces and tell you which anchoring method will actually hold.
Can you design a carport attached to my house?
Yes. We design the carport framing and the connection to the house, check that the house wall or roof framing can carry the added load and uplift, and design posts and footings for the outer edge. Attached carports must still meet the open-sides requirement to stay classified as carports.
Can you design a carport for heavy snow?
Yes. In snow country we design for the ground snow load at your address, unbalanced snow on pitched roofs, and drift where the carport is next to a taller building. That often means stronger purlins, closer frame spacing or a steeper roof to shed snow.
What do you need to start my carport or canopy design?
The address, dimensions and height, roof shape and material, whether it is freestanding or attached, photos of the site, and any kit drawings. For commercial canopies, include the site plan and architectural drawings. We send a fixed-fee quote, usually the same day.
Get your free carports & canopies proposal
Tell us where the project is and what you need. Attach any drawings, photos or plan-check comments. A licensed engineer reviews every request.
- Upload your filesPlans, sketches, photos or comments
- Get a fixed-fee proposalUsually the same day
- Receive stamped drawingsSealed by a PE licensed in your state