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  2. Falling weight deflectometer - Wikipedia

    en.wikipedia.org/wiki/Falling_weight_deflectometer

    There are two different types of load impact systems; single-mass and double-mass. [1] [2] In a single-mass system, a weight is dropped onto a single buffer [clarification needed] connected to a load plate, which in turn rests on the surface being tested. Single-mass FWDs are typically smaller, faster and less expensive but, when used on soft ...

  3. Self-propelled modular transporter - Wikipedia

    en.wikipedia.org/wiki/Self-propelled_modular...

    They set the width of the modules at 2.44 m, so the modules would fit on an ISO container flatrack. They also added 360° steering. [8] They commissioned Scheuerle [9] to develop and build the first units. Deliveries started in 1983. The two companies defined the standard units: a 4-axle SPMT, a 6-axle SPMT and a hydraulic power pack.

  4. Container chassis - Wikipedia

    en.wikipedia.org/wiki/Container_chassis

    A container chassis, also called intermodal chassis or skeletal trailer, is a type of semi-trailer designed to securely carry an intermodal container. Chassis are used by truckers to deliver containers between ports , railyards, container depots, and shipper facilities, [ 1 ] : 2–3 and are thus a key part of the intermodal supply chain .

  5. Truck classification - Wikipedia

    en.wikipedia.org/wiki/Truck_classification

    The typical 5-axle tractor-trailer combination, also called a "semi" or "18-wheeler", is a Class 8 vehicle. [30] Standard trailers vary in length from 8 ft (2.4 m) containers to 57 ft (17 m) van trailers, with the most common length being the 53 ft (16 m) trailer. [31] Specialized trailers for oversized loads can be considerably longer.

  6. Semi-trailer truck - Wikipedia

    en.wikipedia.org/wiki/Semi-trailer_truck

    The vehicle is a 30 m (98 ft) long truck trailer combination with a gross weight exceeding 90 tonnes (89 long tons; 99 short tons). It is estimated that this will give a 20% lower cost and 20–25% CO 2 emissions reduction compared to the regular 60-tonne (59-long-ton; 66-short-ton) truck combinations. As the combination spreads its weight over ...

  7. Intermodal container - Wikipedia

    en.wikipedia.org/wiki/Intermodal_container

    In 1949, while at Brown Trailers Inc. of Spokane, Washington, he modified the design of their stressed skin aluminum 30-foot trailer, to fulfil an order of two-hundred 30 by 8 by 8.5 feet (9.14 m × 2.44 m × 2.59 m) containers that could be stacked two high, for Alaska-based Ocean Van Lines. Steel castings on the top corners provided lifting ...

  8. Conversion of units - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_units

    The factor–label method can convert only unit quantities for which the units are in a linear relationship intersecting at 0 (ratio scale in Stevens's typology). Most conversions fit this paradigm. An example for which it cannot be used is the conversion between the Celsius scale and the Kelvin scale (or the Fahrenheit scale). Between degrees ...

  9. Federal Bridge Gross Weight Formula - Wikipedia

    en.wikipedia.org/wiki/Federal_Bridge_Gross...

    CMVs are restricted by gross weight (total weight of vehicle and cargo), and by axle weight (i.e., the weight carried by each tire). The federal weight limits for CMVs are 80,000 pounds (36,000 kg) for gross weight (unless the bridge formula dictates a lower limit), 34,000 pounds (15,000 kg) for a tandem axle, and 20,000 pounds (9,100 kg) for a ...