Over 50 years ago, 20 ft shipping containers were open. The first containers were used to send goods in metal boxes that crane could load and unload. The first businessman to load a ship with several dozen 35 ft containers was Malcolm Mclean, a native of North Carolina.

His Newark, New Jersey route to Houston, Texas. A shipping container consists of a body with upper and lower horizontal hollow chords inside, top and side walls. Each chord has an opening at bottom and top. To encourage dirt and water runoff, it slopes downward indoor baffles.

Usually, the freight container is made of aluminum, plastic, plywood, fiberglass, steel or a mixture of these materials. The hinged rear door allows cargo storage and unstowing.

Today's containers are designed in many ways. Some are made of 14-gage steel with 20x8.5x8 exterior dimensions, making them a perfect on-site storage unit. Containers are manufactured in several sizes including 20, 30, or 40 feet long with 8, 8.5 and 9 feet high.

A 20 ft container designed to store and hold something. Ideal for short or long-term storage unit collection for building supplies, industrial use, and home use. A 40-foot container has no pockets. All container bottom walls have u-shaped horizontal beams located halfway along the wall length, extending downward.

The walls have a top of one aperture, and the beam has other baffles. Such baffles run from the side to the opposite sidewall and stop at spaced wall intervals.

Shipping containers made from steel have corrugated walls welded to the top, end frames, and bottom side rails. Located on the 8 corners of the container are steel castings used as end frames, welded to 4 corner posts. Their roofs may be made of sheet steel or stainless concrete.

Indoor bows support the roof structure. Plymetal doors are fitted with anti-rackand weatherproof seals. The floor is made of wood laminate, plywood or cross-piece planking.

Aluminum containers are steel-fitted. The steel container sections are the end frames and side rails. Inside and outside posts of sheet aluminum make up the walls riveting to posts. Plywood lined the inner walls and the roof bows welded to the top rails are made of aluminum.

Fiber-reinforced polymer, FRP, is another option for shipping containers. The container is framed in steel with FRP panels on the wall sides, roof and front-end wall. Any roof bows support the roof structure. To make them waterproof, it's coated in mastic. For more information please visit http://www.containersolutions.com