Frequently Asked Questions
Browse the list below for answers to questions you may have, or directly type keywords into the search bar for a more efficient query that will yield multiple similar results.
Don't see the answer you need? Give us a call at (800) 936-0896 or email at sales@midstatecontainers.com.
CONTAINER CONDITIONS AND COMPONENTS
Are containers weatherproof and waterproof?
It depends on the grade of the container, but, yes, nearly all of our containers are weatherproof and waterproof. The only containers not guaranteed to be weather- and waterproof are the "As Is." We do not recommend purchasing these containers if you desire to have your cargo protected from the elements.
View our container grades here for more information.
What is the maximum weight a container can hold?
That depends on the size of the container.
The max. gross weight of a 10' container is ~22,400; net weight ~19,500.
The maximum gross weight of a 20' container is ~67,000lbs with a net weight of ~63,100.
The max. gross weight of a 40' container is ~71,900 with a net weight of ~63,500.
A 40' High Cube has a max. gross of ~71,800 and a net of ~63,200.
What's the difference between the various container grades?
Generally speaking, physical condition and quality are the only differences between the various container grades. Factors such as the age of the container, amount of usage, damage accrued through that usage, and lifetime exposure to the elements can all affect its condition and quality, but are not perfectly correlated with the container grade.
Read more on our container grades here.
What color do they come in? Can I request a color?
Used containers come in a few select colors, namely reddish-brown, blue, and green. Newer, one-trip containers are typically a light tan or light grey color. Due to covid-related supply shortages and complications, we don't have as much control over the types and colors of containers we're receiving, which means you, too, will be limited in container colors you can pick.
We do offer painting services. We offer tan or light grey options, but if you would like a custom color, we can do any color off of the Sherwin-Williams color board. Custom color is an additional $50.
Check out our painting prices here.
How wide is a shipping container?
A standard shipping container is 8 feet (2.44 m) wide.
High-cube and specialized containers keep the same width but differ in height or length.
Are containers rusty?
It depends on the grade of container. "As Is" containers, which are our lowest-graded containers available, may have structural rust, which potentially puts the integrity of the container at risk.
Other, higher-quality containers may have some minor cosmetic rust, such as our "Wind and Watertight" and "Cargo Worthy" grades. "One Trip" containers will be free of rust.
How to level a shipping container?
Use concrete blocks, railroad ties, or steel plates at the corners to ensure it’s level.
Always check alignment with a laser or bubble level to prevent door binding and uneven load stress.
Who invented the shipping container?
The modern intermodal shipping container was invented by Malcolm McLean in 1956.
His design revolutionized global trade by standardizing cargo transport between trucks, ships, and trains.
How thick are shipping container walls?
Walls are typically 1,6-2 mm thick corrugated corten steel.
The roof panels are slightly thinner, while corner posts and frames are much thicker for load-bearing strength.
Can I put a shipping container on my property?
Yes, in most areas you can.
However, local zoning or building codes may require permits, especially for permanent installations or residential conversions.
How much weight can a shipping container hold?
A 20 ft container can hold about 28,000 kg (62,000 lb), and a 40 ft up to 30,400 kg (67,000 lb).
The exact payload depends on the container’s build and certification plate.
Where can I store my shipping container?
You can store it on your private property, leased land, or a secure container yard.
Just ensure the surface is level, dry, and accessible for delivery trucks.
Can you live in a shipping container?
Yes, with proper insulation, ventilation, and utilities, containers can be converted into fully livable homes.
They’re popular for eco-friendly, modular, and affordable housing projects.
Is a shipping container considered a permanent structure?
Not by default.
A container is temporary if it’s movable and not fixed to the ground, but permanent if placed on a foundation or connected to utilities.
Will a car fit in a shipping container?
Yes, most cars fit in a 20 ft container, while larger SUVs or multiple cars need a 40 ft.
Ensure proper loading with tie-downs to prevent movement during transport.
Do you modify shipping containers?
Yes, we modify shipping containers to meet your specific needs.
We can add doors, windows, insulation, electrical wiring, and custom interiors for offices, cafes, homes, and workshops.
What Type of Modifications Can Be Done to the Containers?
Typical modifications include insulation, HVAC systems, doors, windows, plumbing, electrical setups, partitions, and paint finishes.
We also perform advanced conversions like container offices, home studios, or pop-up shops.
How long do container conversions take?
Most conversions take 2 to 6 weeks, depending on complexity and customization level.
Simple cutouts are faster; full builds with insulation and wiring take longer.
Can the Container Be Used as an Office?
Absolutely. Containers make great mobile or permanent offices.
They’re secure, portable, and customizable with insulation, lighting, and AC for comfort.
Do shipping containers require maintenance?
Minimal maintenance is needed.
Keep them rust-free, well-painted, and ventilated to extend lifespan beyond 25 years.
What other names are shipping containers known as?
They’re also called conex boxes, storage containers, sea cans, or cargo containers.
All these refer to the same steel modular units.
What are shipping containers made of?
They’re built from corten (weathering) steel, resistant to corrosion, salt, and harsh weather.
Floors are typically marine-grade plywood or bamboo. More about that you can read in our article.
What is the expected life of a shipping container?
A container lasts 20 to 30 years with basic upkeep.
Used ones have shorter lifespans depending on prior ocean use.
Do you offer container rentals?
Yes, we provide short- and long-term container rentals for storage, offices, or event spaces.
Rental units are inspected and ready for immediate use.
What is the best surface for positioning a shipping container?
The best base is level, compacted ground with proper drainage.
Concrete pads, asphalt, or compacted gravel work best.
What are the most common types of shipping containers?
The most common types are standard dry containers, high cubes, open-tops, flat-racks, and refrigerated (reefer) containers.
Each serves a different purpose based on cargo and environment.
What size containers are available?
Standard options include 10ft, 20ft, 40ft, and 45ft high cube containers.
Specialty sizes can be fabricated upon request.
How much do containers weigh?
A 20ft container weighs around 4,800 lb (2,200 kg) empty.
A 40ft container weighs about 8,200 lb (3,700 kg).
Difference between New & Used Containers?
New containers (one-trip) are clean, dent-free, and have a full lifespan ahead.
Used containers are more affordable, but may show cosmetic wear.
What is the tare weight or payload for a shipping container?
A 20ft container has about 2.2 tons tare weight and 28 tons payload.
A 40ft has around 3.8 tons tare and 26-28 tons payload capacity.
What are the different uses for shipping containers?
They’re used for storage, offices, workshops, pop-up cafes, homes, retail spaces, and equipment housing.
Their modular structure allows endless customization.
How to paint a shipping container?
Use marine-grade or industrial epoxy paint.
It protects against rust and UV damage, extending container life.
What are the best types of insulation for a shipping container?
The best options are spray foam, rigid foam boards, or fiberglass panels.
Spray foam offers superior moisture and temperature control.
Why do people call shipping containers conex?
Conex comes from Container Express, a U.S. Army term from the 1950s.
It became a common nickname for intermodal containers.
What are common container uses?
Common uses include storage, housing, retail, construction site offices, and portable workshops.
Businesses use them for mobility, durability, and cost savings.
What site preparation do I need to do?
Ensure the area is level, accessible by truck, and well-drained.
Remove debris and prepare a compacted gravel or concrete base.
Why should I choose a shipping container over a brick and mortar building or other modular structure?
Containers are faster, cheaper, and relocatable compared to traditional buildings.
They require less permitting and can be installed in days, not months.
How to move a storage container by yourself?
Use a forklift, tilt-bed trailer, or crane, depending on container size.
For safety, hire professionals for moves over 20 ft.
Do I Need Planning Permission for Container Placement?
In most areas, temporary placements don’t require permits.
For long-term installations, check local zoning and building regulations.
How to move a shipping container?
You can move it using a tilt-bed truck, forklift, or crane.
For long distances or larger sizes, use flatbed trailers or container transport services.