What is AASHTO H20 loading?
What is AASHTO H20 loading?
H-20 loading, also known as HS-20 loading, is the design criteria of the American Association of State Highway Transportation Officials, or AASHTO. It “means” a truck axle loading of 32,000 pounds or wheel loading of 16,000 pounds.
What is AASHTO Lane load?
The design lane load consists of a load of 0.64 klf uniformly distributed in the longitudinal direction. See Figure 3 for the loading diagrams. Transversely, the design lane load is assumed to be uniformly distributed over a 10.0-foot width.
What is the difference between H20 and HS20 loading?
The only difference in these two vehicles is that the “HS20” truck has an additional 32,000-pound axle located under the trailer, which is separated by a minimum distance of 14′ – for a total load of 72,000 pounds. An “H20” truck only has one axle under the trailer and a total load of 40,000 pounds.
What do you mean by HS20 44 loading?
What does the number “44” represent in HS-20-44? Quite often, this number “44” is mistakenly assumed to mean 44,000 lbs in some design context. The number “44” actually refers to the year, 1944, in which the HS-20 traffic loading conditions were originally developed by AASHTO.
What do you mean by HS20 44?
The number “44” actually refers to the year, 1944, in which the HS-20 traffic loading conditions were originally developed by AASHTO.
What does AASHTO stand for?
American Association of State Highway and Transportation Officials
The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols, and guidelines that are used in highway design and construction throughout the United States.
What is H20 live load?
What does HS-20 traffic rating mean? This is the term used by AASHTO and ACI to describe normal MOVING traffic loading conditions up to 18-wheeler loading. This loading assumes a 16,000 lbs wheel load and therefore a 32,000 lbs axle load.
What is Lane loading?
Lane loading is referred to as the load, which is used to provide the easier method of computing the shear and moments rather than using the concentrated wheel loads. These loads are used in the design of bridge decks, which consists of several lanes on the multiple spans.
What is dynamic load allowance?
A dynamic load allowance (DLA) is a quantitative measure of dynamic effects exerted in addition to static loads by moving vehicles on highway bridges. The American Association of State Highway and Transportation Officials (AASHTO) recommends using 33% as a maximum value of DLA [1].