What is the difference between H-20 and HS-20 loading?
What’s the Difference Between H-20 and HS-20? The difference between an H-20 and HS-20 is an H series truck has two loaded axles, one for the drive axle and one for the trailer, and an HS series truck has more than two loaded axles, one for the drive axle and more than one for the trailer.
What is AASHTO HS20?
HS-20 is the truck live loadings of the AASHTO specification, where H stands for highway, S stands for semi-trailer, 20 stands for 20-ton weight of the tractor (first two axles). The “Design Tandem “consists of two axles, each axle weighing 25 kips spaced 4 ft apart.
What does HS20-44 mean?
Example of an HS truck loading: HS20-44 indicates a vehicle with a front tractor axle weighing 4 tons, a rear tractor axle weighing 16 tons, and a semi- trailer axle weighing 16 tons. The H and HS vehicles do not represent actual vehicles, but can be considered as “umbrella” loads.
What is HS25 loading?
H25/HS25 = 20,000-lb wheel load, 40,000-lb axle. Covers designed to meet the basic requirements for these loads need only be tested with a proof load to meet these minimums. If a specification requires H20/HS20 loading it simply requires a cover meet the design load of 16,000 pounds per wheel without a safety factor.
What are Aashto standards?
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?
An “H20” or an “HS20” series truck will both have an 8,000-pound axle load for the drive axle and a 32,000 pound axle load for the axle(s) under the trailer. An “H20” truck only has one axle under the trailer and a total load of 40,000 pounds.
What is AASHTO H 20 loading?
32,000 pounds
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. Standards as published by AASHTO are categorized into classes.
What are AASHTO standards?
What is Aashto H 20 loading?
How many AASHTO standards are there?
Technical revisions were made in 28 of the standards since the Thirty-Third Edition, 27 standards were reconfirmed, 3 new standards were added, 1 standard was discontinued, and 4 standards were deleted.
What is the role of AASHTO?
AASHTO works to educate the public and key decision makers about the critical role that transportation plays in securing a good quality of life and sound economy for our nation. AASHTO serves as a liaison between state departments of transportation and the Federal government.
What is H 40 loading?
AASHTO H40 or HS-40 Loading is specified for areas that will be subjected to extremely heavy truck traffic (such as truck stops, fire stations and mining facilities).
What does HS-20 stand for in AASHTO?
HS-20 is the truck live loadings of the AASHTO specification, where H stands for highway, S stands for semi-trailer, 20 stands for 20-ton weight of the tractor (first two axles).
How many tires are in an AASHTO H-20 axle?
RE: AASHTO H-20, HS-20. . . AASHTO Loading of either H-20 or HS-20 is based on an axle load of 32 kips. This load is divided into two tires; that is a load at each end of the axle.
What is the H-20 / HS-20 loading rating?
What is H-20/HS-20 Loading? AASHTO’s H-20 and HS-20 are live load ratings applied to the design of bridges or other suspended items (e.g. lids for concrete vaults). Designers use H-20 or HS-20 from AASHTO, or specific axle configurations, to express the extreme load effect created by heavy vehicles such as transports, buses and fire trucks.
What kind of load rating does AASHTO use?
AASHTO’s H-20 and HS-20 are live load ratings applied to the design of bridges or other suspended items (e.g. lids for concrete vaults).