Trucking magnate Malcom McLean buys the Pan-Atlantic Steamship Company, to form a container shipping enterprise, later known as Sea-Land. It was at this time that standardized new 35 ft (10.7 m) x 8 ft (2.4 m) x 8 ft 6 in (2.6 m) Sea-Land containers were developed, the length determined by the maximum length of trailers then allowed on Pennsylvanian highways. Each container had a frame with eight corner castings that could withstand stacking loads.