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RAF aircrew with one of their Bristol Beaufighters on a PSP airstrip at Biferno, Italy, August 1944. Marston Mat, more properly called pierced (or perforated) steel planking (PSP), is standardized, perforated steel matting material developed by the United States at the Waterways Experiment Station shortly before World War II, primarily for the rapid construction of temporary runways and ...
Passenger boarding stairs. Passenger boarding stairs, sometimes referred to as boarding ramps, stair car or aircraft steps, provide a mobile means to traverse between the aircraft doors and the ground. Because larger aircraft have door sills 5 to 20 feet (1.5 to 6.1 m) high, stairs facilitate safe boarding and deplaning.
Watermen's stairs were semipermanent structures that formed part of a complex transport network of public stairs, causeways and alleys in use from the 14th century to access the waters of the tidal River Thames in England.
The M60 AVLB was introduced in 1963. This combat engineer vehicle was developed by the US Army Engineer Research & Development Laboratories under contract with General Dynamics to replace the previous M48 AVLB. It was designed to launch bridge for tanks and other wheeled combat vehicles across trenches and water obstacles in combat conditions.
Mud mats are a combination of a reinforced member (such as metal bars or bamboo) confining geosynthetic fabric in a portable mat, that can be rolled up for ease of transport and deployment. A lightweight, light-duty flexible mat suitable for distributing loads over firm ground to avoid rutting. They are not commonly used for access matting in ...
This Harmar stair lift has a 600-pound lifting capacity, making it a top pick for heavier individuals. The lift has a high-back chair, stationary armrests, and reinforced footrest, all of which ...
Landing, or platform: A landing is the area of a floor near the top or bottom step of a stair. An intermediate landing is a small platform that is built as part of stairs between main floor levels and is typically used to allow the stairs to change directions, or to allow the user a rest.
A portable water tank is a temporary collapsible tank designed for the reserve storage of water in firefighting, emergency relief, and military applications. These tanks can be either supported or unsupported. The supported tanks have a steel or aluminum frame and range in size from 600 to 5,000 US gallons (500 to 4,160 imp gal; 2,300 to 18,900 ...
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