FAQ
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What sizes do the shipping containers come in?

International standard (ISO) sizes are 20-foot, 40-foot, and 40-foot “high-cube,” which are the three most common sizes. For additional sizes, dimensions, and technical specifications, view our containers for sale.
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What materials make up a shipping container?

New ISO containers are constructed of steel with marine-grade plywood flooring.
-
Are the shipping containers new or used?

Interport sells both new and used containers. New containers come direct from the factory, as one-trip units, meaning they have only been used to carry freight once. Used containers are available in a range of conditions. Interport categorizes containers into four classifications.
-
How does Interport grade used shipping containers?

Cargo-worthy: – (Not repaired or maintained in accordance with IICL guidelines.) Cargo-worthy used shipping containers are a great option for ground level storage and modifications. These used containers are also suitable for international marine use, but first need to be physically inspected and certified by a third-party container surveyor. These shipping containers may have minor surface rust and dents.
Wind and watertight: (A slightly lower standard than cargo-worthy.) These used shipping containers may not meet international marine use standards but are wind and water-tight, and a good choice for ground level storage. These shipping containers may have minor surface rust and dents.
-
What are the most common shipping container uses?

Container uses include weather-tight storage, overseas shipping, portable offices and restrooms, modular buildings, machinery and equipment storage, military command centers, hunting shelters, and much more. For more popular modifications, view our shipping container modifications and customization options.
-
Does my container require a survey report?

If you are using the container for international shipping it will require a physical inspection and certification by a third-party container surveyor. Interport can facilitate this process.
-
How are the shipping containers delivered?

Interport outsources its delivery service to third-party trucking companies. Containers can be delivered by either flatbed, tilt-bed, low-boy (low-bed) trailer, or chassis. Please note container delivery by flatbed, low-boy (low-bed) trailer, or chassis requires a forklift or crane at the delivery site. Alternatively, you can arrange for pick-up at Interport using a trucking company of your choice.
-
How should I prepare the ground for delivery?

Your shipping container should be placed on firm, dry, level ground, i.e. pavement, gravel, or hard dirt. If your container is being delivered by flatbed trailer, you will need a crane or forklift onsite at the time of delivery so you can lift the container off the truck.
-
How much room is required for tilt-bed delivery?

A 20-foot container requires 60-feet of straight running room (no bends), 12-feet wide. A 40-foot container requires 120-feet of straight running room for delivery by tilt-bed truck (no bends), 12-feet wide. For the height, a minimum of 14-feet of overhead clearance is needed for containers on a chassis/tilt-bed or on a low-bed (low-boy) so as not to hit wires, etc. If the trucking company cannot make delivery, customer will be responsible for all related trucking and transportation costs.
-
How can my shipping container be customized?

Interport has a dedicated, purpose-built modification shop on-site. Some popular modifications are personnel doors, roll-up doors, windows, painting, electrical, and HVAC. Other container customization options are also available.
-
How is payment made?

Once you have ordered your shipping container, Interport will issue you an invoice. Once your invoice is paid via check, money order, wire transfer, cash, or credit card, Interport will release your container to you or to the trucking company making your delivery.
-
What areas does Interport serve?

Interport delivers containers across the Northeast and Mid-Atlantic, including New Jersey, New York, Pennsylvania, Connecticut, Delaware, Massachusetts, and surrounding states. Delivery can often be arranged within one business day, depending on availability and site access.
-
Can I visit Interport’s facility in person?

Yes. Interport welcomes visitors to its Newark, New Jersey headquarters to view container inventory, discuss modification options, or arrange purchases directly. We recommend scheduling an appointment in advance.
-
Can shipping containers be stacked?

Yes. All Interport containers are ISO-certified and designed for stacking using corner castings and twist locks. For ground storage, stacking up to three containers high is common, though it depends on the surface and structural load limits.
-
What is the difference between a high-cube and a standard container?

A high-cube container is one foot taller than a standard container — 9’6” high compared to 8’6”. That extra height provides about 12% more cubic space, making it ideal for bulky or tall cargo, or when converting containers into offices or workshops.
-
What power source is needed for refrigerated containers?

Refrigerated containers (reefers) typically require a 460V, 3-phase electrical connection. For remote sites or events, they can also run on compatible portable generators.
-
What’s the difference between refrigerated and insulated containers?

Refrigerated containers feature active cooling systems that regulate interior temperature. Insulated containers, also called non-working reefers, have no active cooling but provide temperature stability and protection against condensation and mold.
-
Can shipping containers be modified for specific uses?

Yes. Interport’s on-site modification shop can add doors, windows, insulation, electrical systems, HVAC, lighting, roll-up doors, or paint. Containers can be transformed into offices, workshops, storage units, classrooms, or command centers.
-
What is a one-trip container?

A one-trip container is essentially new — used only once to ship goods from the factory to the U.S. These units offer the best condition and longevity available for sale.
-
How long does delivery usually take?

In most cases, delivery can be arranged within one to three business days of purchase, depending on container availability, location, and trucking logistics.
-
Can I buy multiple containers at once?

Absolutely. Interport regularly fulfills bulk and wholesale orders for businesses, municipalities, and construction companies. Quantity discounts and coordinated deliveries are available.
-
Are containers safe for storing valuable items?

Yes. Interport containers are lockable, steel-built, and fully enclosed, providing excellent security for valuable tools, machinery, or materials. Optional lockboxes can be added for additional protection.
-
How long do shipping containers last?

With proper maintenance, containers can last 20 years or more. Corten steel construction resists corrosion, and minor repairs can significantly extend their service life.
-
Can I pick up my container instead of having it delivered?

Yes. Customers may arrange pickup from Interport’s New Jersey facility using their own trucking company. Interport’s staff will assist with loading and documentation.
Contact us with questions or for more information
-
-
Accept: A reservation to accept a unit into the depot. This can be either specific or a blanket (nonspecific).
As is where is: As is where is containers are sold in their current condition, which can include dents, rust, holes in the floor, and other interior irregularities or missing components. These shipping containers are suitable for fencing, walls, barriers, and other non-transportation applications.
Box: An informal term for a shipping container.
Cargo-worthy: Cargo-worthy used shipping containers are not repaired or maintained in accordance with IICL guidelines. These shipping containers may have minor surface rust and dents and are a great option for storage and container modifications. These used containers may also be suitable for international marine use, but first need to be physically inspected and certified by a third-party container surveyor.
Chassis: A chassis is a special trailer or undercarriage used to transport ocean containers over the road. A chassis will be necessary for the transport of a shipping container traveling by truck and overweight or larger containers may require a tri-axle chassis or incur fees.
Conex Box: Another name for a shipping container, which is a blend of ‘container’ and ‘express.’
Container Classifications: International Institute of Container Lessors (IICL) repair standards, by which all repairs are carried out, for its members when containers are off hired. Criteria is also used for equipment interchanges between operators.
CSC Plate: The CSC plate is fastened to every shipping container by the factory at the time that it is manufactured and typically is riveted to the outside of the left door of the container.
Drayage Cost: transportation costs to deliver container(s).
Drop Deck: Refers to a flatbed like chassis that is lower to the ground and is mostly used for high cube containers, which are 9’ 6” in height instead of 8’ 6”.
Equipment ID: The 10-digit identifier that is on every shipping container. The first four positions are alpha and the next six positions are numeric; Example: ITXU123456 (all Interport containers begin with ITXU).
Flatbed: Refers to a chassis that cannot tilt and would require a forklift or crane to remove it upon delivery.
Freight Container: One of the many names for a shipping container. A freight container is used for the transport of materials in commerce.
Freight Forwarding: The moving of imports and exports through the supply chain. Freight forwarding businesses work with shipping companies, airlines, haulers, shipping container companies, and customs authorities to move items from their point of origin to their final destination.
Ground Level Office (GLO): A term used by some customers for modified shipping container office.
High Cube: Refers to a higher height container, measuring 9’ 6”. High cubes come in 20ft and 40ft lengths and are all 8’ wide.
International Institute of Container Lessors (IICL): The leading trade association of the marine container leasing and chassis provider industry. IICL container leasing member companies engage in leasing marine cargo containers to ship operators and others on a broad international basis. The IICL, on behalf of its members is active in governmental, regulatory, customs, tax, educational, technological, and environmental matters.
ISO Containers: ISO or Intermodal Containers are large, standardized shipping containers, designed and built for intermodal freight transport, meaning these containers can be used across different modes of transport – from ship to rail to truck – without unloading and reloading their cargo. Containers must conform to ISO (International Organization for Standardization) specifications. These standards relate directly to how the containers are built and to guarantee they will withstand extreme environments. It also ensures the containers meet the size and durability requirements, which allow them to be stacked safely and uniformly on steamships and railcars.
Layout (verb): the process of staging a shipping container for pick up after hours of operation. Only tilt bed trucks can retrieve a staged container.
Layout (noun): The unit that has been staged for pickup after hours.
Low-Boy: A lowboy is a semi-trailer, also referred to as a low-bed trailer, with two drops in deck height: one right after the gooseneck and one right before the wheels.
Open Side Container: A container which has extra sets of cargo doors along the length of the container, making loading and unloading more convenient.
Reefer: A “reefer” or refrigerated container is used to keep perishable commodities and other goods cold and moisture-free. Since reefers are temperature controlled, they can be used as coolers or freezers.
Release: Notification that a container will be picked up from the yard. This can be either specific or a blanket (nonspecific).
Sea box: Also commonly known as sea containers, this is another term for shipping containers. Given their strength to withstand shipment, storage, and handling, sea box is synonymous with “shipping containers” or “intermodal freight container” in the context of the international shipping trade.
Standard: Refers to a standard height container, measuring 8’ 6”. Standard (dry) containers come in 10ft, 20ft, and 40ft sizes and are all 8’ wide.
Survey: Inspection of a shipping container by a certified third party for the purposes of transporting products overseas.
Survey Report: Report established by a surveyor after inspection of the unit, with a view to documenting the condition of the container and generally serving to establish whether the cargo container is suitable for transportation or not.
TEU: Acronym for Twenty-Foot Equivalent Unit is a measure of space that units take in a location. For example, a 20’ Unit is 1 TEU and 40’ unit is 2 TEU.
Tilt Bed: Refers to a truck that can tilt its bed and place containers on the ground.
TIR: Acronym for Trailer Interchange Receipt, which is given to a driver accepting or releasing a shipping container.
Unit: A container that is stored or transported in or out of the depot.
Unit Number: An alpha-numeric number that identifies the conex box. The number consists of three parts. Four position alpha, six position numeric, and a one position check digit.
Wind and Watertight: These used shipping have a slightly lower standard than cargo-worthy containers. They may not meet international marine use standards but are wind and water-tight and a good choice for ground level storage. These used shipping containers may have minor surface rust and dents.
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General
-
What sizes do the shipping containers come in?

International standard (ISO) sizes are 20-foot, 40-foot, and 40-foot “high-cube,” which are the three most common sizes. For additional sizes, dimensions, and technical specifications, view our containers for sale.
-
What materials make up a shipping container?

New ISO containers are constructed of steel with marine-grade plywood flooring.
-
Are the shipping containers new or used?

Interport sells both new and used containers. New containers come direct from the factory, as one-trip units, meaning they have only been used to carry freight once. Used containers are available in a range of conditions. Interport categorizes containers into four classifications.
-
How does Interport grade used shipping containers?

Cargo-worthy: – (Not repaired or maintained in accordance with IICL guidelines.) Cargo-worthy used shipping containers are a great option for ground level storage and modifications. These used containers are also suitable for international marine use, but first need to be physically inspected and certified by a third-party container surveyor. These shipping containers may have minor surface rust and dents.
Wind and watertight: (A slightly lower standard than cargo-worthy.) These used shipping containers may not meet international marine use standards but are wind and water-tight, and a good choice for ground level storage. These shipping containers may have minor surface rust and dents.
-
What are the most common shipping container uses?

Container uses include weather-tight storage, overseas shipping, portable offices and restrooms, modular buildings, machinery and equipment storage, military command centers, hunting shelters, and much more. For more popular modifications, view our shipping container modifications and customization options.
-
Does my container require a survey report?

If you are using the container for international shipping it will require a physical inspection and certification by a third-party container surveyor. Interport can facilitate this process.
-
How are the shipping containers delivered?

Interport outsources its delivery service to third-party trucking companies. Containers can be delivered by either flatbed, tilt-bed, low-boy (low-bed) trailer, or chassis. Please note container delivery by flatbed, low-boy (low-bed) trailer, or chassis requires a forklift or crane at the delivery site. Alternatively, you can arrange for pick-up at Interport using a trucking company of your choice.
-
How should I prepare the ground for delivery?

Your shipping container should be placed on firm, dry, level ground, i.e. pavement, gravel, or hard dirt. If your container is being delivered by flatbed trailer, you will need a crane or forklift onsite at the time of delivery so you can lift the container off the truck.
-
How much room is required for tilt-bed delivery?

A 20-foot container requires 60-feet of straight running room (no bends), 12-feet wide. A 40-foot container requires 120-feet of straight running room for delivery by tilt-bed truck (no bends), 12-feet wide. For the height, a minimum of 14-feet of overhead clearance is needed for containers on a chassis/tilt-bed or on a low-bed (low-boy) so as not to hit wires, etc. If the trucking company cannot make delivery, customer will be responsible for all related trucking and transportation costs.
-
How can my shipping container be customized?

Interport has a dedicated, purpose-built modification shop on-site. Some popular modifications are personnel doors, roll-up doors, windows, painting, electrical, and HVAC. Other container customization options are also available.
-
How is payment made?

Once you have ordered your shipping container, Interport will issue you an invoice. Once your invoice is paid via check, money order, wire transfer, cash, or credit card, Interport will release your container to you or to the trucking company making your delivery.
-
What areas does Interport serve?

Interport delivers containers across the Northeast and Mid-Atlantic, including New Jersey, New York, Pennsylvania, Connecticut, Delaware, Massachusetts, and surrounding states. Delivery can often be arranged within one business day, depending on availability and site access.
-
Can I visit Interport’s facility in person?

Yes. Interport welcomes visitors to its Newark, New Jersey headquarters to view container inventory, discuss modification options, or arrange purchases directly. We recommend scheduling an appointment in advance.
-
Can shipping containers be stacked?

Yes. All Interport containers are ISO-certified and designed for stacking using corner castings and twist locks. For ground storage, stacking up to three containers high is common, though it depends on the surface and structural load limits.
-
What is the difference between a high-cube and a standard container?

A high-cube container is one foot taller than a standard container — 9’6” high compared to 8’6”. That extra height provides about 12% more cubic space, making it ideal for bulky or tall cargo, or when converting containers into offices or workshops.
-
What power source is needed for refrigerated containers?

Refrigerated containers (reefers) typically require a 460V, 3-phase electrical connection. For remote sites or events, they can also run on compatible portable generators.
-
What’s the difference between refrigerated and insulated containers?

Refrigerated containers feature active cooling systems that regulate interior temperature. Insulated containers, also called non-working reefers, have no active cooling but provide temperature stability and protection against condensation and mold.
-
Can shipping containers be modified for specific uses?

Yes. Interport’s on-site modification shop can add doors, windows, insulation, electrical systems, HVAC, lighting, roll-up doors, or paint. Containers can be transformed into offices, workshops, storage units, classrooms, or command centers.
-
What is a one-trip container?

A one-trip container is essentially new — used only once to ship goods from the factory to the U.S. These units offer the best condition and longevity available for sale.
-
How long does delivery usually take?

In most cases, delivery can be arranged within one to three business days of purchase, depending on container availability, location, and trucking logistics.
-
Can I buy multiple containers at once?

Absolutely. Interport regularly fulfills bulk and wholesale orders for businesses, municipalities, and construction companies. Quantity discounts and coordinated deliveries are available.
-
Are containers safe for storing valuable items?

Yes. Interport containers are lockable, steel-built, and fully enclosed, providing excellent security for valuable tools, machinery, or materials. Optional lockboxes can be added for additional protection.
-
How long do shipping containers last?

With proper maintenance, containers can last 20 years or more. Corten steel construction resists corrosion, and minor repairs can significantly extend their service life.
-
Can I pick up my container instead of having it delivered?

Yes. Customers may arrange pickup from Interport’s New Jersey facility using their own trucking company. Interport’s staff will assist with loading and documentation.
Contact us with questions or for more information
-
-
Container Terms
Accept: A reservation to accept a unit into the depot. This can be either specific or a blanket (nonspecific).
As is where is: As is where is containers are sold in their current condition, which can include dents, rust, holes in the floor, and other interior irregularities or missing components. These shipping containers are suitable for fencing, walls, barriers, and other non-transportation applications.
Box: An informal term for a shipping container.
Cargo-worthy: Cargo-worthy used shipping containers are not repaired or maintained in accordance with IICL guidelines. These shipping containers may have minor surface rust and dents and are a great option for storage and container modifications. These used containers may also be suitable for international marine use, but first need to be physically inspected and certified by a third-party container surveyor.
Chassis: A chassis is a special trailer or undercarriage used to transport ocean containers over the road. A chassis will be necessary for the transport of a shipping container traveling by truck and overweight or larger containers may require a tri-axle chassis or incur fees.
Conex Box: Another name for a shipping container, which is a blend of ‘container’ and ‘express.’
Container Classifications: International Institute of Container Lessors (IICL) repair standards, by which all repairs are carried out, for its members when containers are off hired. Criteria is also used for equipment interchanges between operators.
CSC Plate: The CSC plate is fastened to every shipping container by the factory at the time that it is manufactured and typically is riveted to the outside of the left door of the container.
Drayage Cost: transportation costs to deliver container(s).
Drop Deck: Refers to a flatbed like chassis that is lower to the ground and is mostly used for high cube containers, which are 9’ 6” in height instead of 8’ 6”.
Equipment ID: The 10-digit identifier that is on every shipping container. The first four positions are alpha and the next six positions are numeric; Example: ITXU123456 (all Interport containers begin with ITXU).
Flatbed: Refers to a chassis that cannot tilt and would require a forklift or crane to remove it upon delivery.
Freight Container: One of the many names for a shipping container. A freight container is used for the transport of materials in commerce.
Freight Forwarding: The moving of imports and exports through the supply chain. Freight forwarding businesses work with shipping companies, airlines, haulers, shipping container companies, and customs authorities to move items from their point of origin to their final destination.
Ground Level Office (GLO): A term used by some customers for modified shipping container office.
High Cube: Refers to a higher height container, measuring 9’ 6”. High cubes come in 20ft and 40ft lengths and are all 8’ wide.
International Institute of Container Lessors (IICL): The leading trade association of the marine container leasing and chassis provider industry. IICL container leasing member companies engage in leasing marine cargo containers to ship operators and others on a broad international basis. The IICL, on behalf of its members is active in governmental, regulatory, customs, tax, educational, technological, and environmental matters.
ISO Containers: ISO or Intermodal Containers are large, standardized shipping containers, designed and built for intermodal freight transport, meaning these containers can be used across different modes of transport – from ship to rail to truck – without unloading and reloading their cargo. Containers must conform to ISO (International Organization for Standardization) specifications. These standards relate directly to how the containers are built and to guarantee they will withstand extreme environments. It also ensures the containers meet the size and durability requirements, which allow them to be stacked safely and uniformly on steamships and railcars.
Layout (verb): the process of staging a shipping container for pick up after hours of operation. Only tilt bed trucks can retrieve a staged container.
Layout (noun): The unit that has been staged for pickup after hours.
Low-Boy: A lowboy is a semi-trailer, also referred to as a low-bed trailer, with two drops in deck height: one right after the gooseneck and one right before the wheels.
Open Side Container: A container which has extra sets of cargo doors along the length of the container, making loading and unloading more convenient.
Reefer: A “reefer” or refrigerated container is used to keep perishable commodities and other goods cold and moisture-free. Since reefers are temperature controlled, they can be used as coolers or freezers.
Release: Notification that a container will be picked up from the yard. This can be either specific or a blanket (nonspecific).
Sea box: Also commonly known as sea containers, this is another term for shipping containers. Given their strength to withstand shipment, storage, and handling, sea box is synonymous with “shipping containers” or “intermodal freight container” in the context of the international shipping trade.
Standard: Refers to a standard height container, measuring 8’ 6”. Standard (dry) containers come in 10ft, 20ft, and 40ft sizes and are all 8’ wide.
Survey: Inspection of a shipping container by a certified third party for the purposes of transporting products overseas.
Survey Report: Report established by a surveyor after inspection of the unit, with a view to documenting the condition of the container and generally serving to establish whether the cargo container is suitable for transportation or not.
TEU: Acronym for Twenty-Foot Equivalent Unit is a measure of space that units take in a location. For example, a 20’ Unit is 1 TEU and 40’ unit is 2 TEU.
Tilt Bed: Refers to a truck that can tilt its bed and place containers on the ground.
TIR: Acronym for Trailer Interchange Receipt, which is given to a driver accepting or releasing a shipping container.
Unit: A container that is stored or transported in or out of the depot.
Unit Number: An alpha-numeric number that identifies the conex box. The number consists of three parts. Four position alpha, six position numeric, and a one position check digit.
Wind and Watertight: These used shipping have a slightly lower standard than cargo-worthy containers. They may not meet international marine use standards but are wind and water-tight and a good choice for ground level storage. These used shipping containers may have minor surface rust and dents.