Aashto hs20 44 pdf merge

Aashto more than 10 years ago cant be used with new lrfd specs without additional calibration. What is the difference between hs20 and tier 22 ratings. From aldot bridge bureau structures design and detail manual by alabama department of. H20 and h2044 structural engineering general discussion. Today, all but the h1044 vehicle are still included in the. Pdf advanced bridge capacity and structural integrity. They dont teach it in college anymore moving forward net load effect difference between hl93 and hs20 44 loading is very small.

You can verify this either with aashto or the 1963 california highway design manual. Aashto the american association of state highway transportation officials is a nonprofit, nonpartisan association representing highway and transportation departments in the 50 states, the district of columbia, and puerto rico. Dynamic behavior of integral bridges using sap 2000 a comparative study sajmi mamshad student. Evolution of aashtobased bridge design southern plains. Section 3 of the aashto manual for condition evaluation of bridges.

The aashto specifications also allow you to represent the truck as a single concentrated load and an uniform load. Load and resistance factor design lrfd for highway. For a continuous span structure, different loads can combine. By merging the beams together, the concrete column to beam connectivity is lost. The hs2044 loading with alternate military loading, the. Hs20 44 8 kips 32 kips 32 kips hs15 44 6 kips 24 kips 32 kips live loads for bridges the aashto standard h20 and hs20 trucks live loads for bridges the aashto specifications also allow you to represent the truck as a single concentrated load and an uniform load. The manual is based on the aashto lrfd bridge design specifications. The lrfd design truck is exactly the same as the aashto hs20. It is used as the design loading for highway structures in usa and other countries where aashto code is followed.

Grasspave2, gravelpave2, and slopetame2 can withstand 15,940 psi with. When h 2044 and hs 2044 loads are used for timber deck floor design. The number 44 actually refers to the year, 1944, in which the hs20 traffic loading conditions were originally developed by aashto. Click on the aashto tab in the load generator tab and select the hs 2044. Aashto hs2044 truck precastprestressed concrete institute 2003. Combine plain, reinforced and prestressed concrete. Why does the memorandum reference the aashto manual for bridge evaluation. With the hs20 44, you have a 44 foot overall length, 14 foot tractor and a 30 foot trailer, with 4 tons on the front axle and 8 tons on the rear of the tractor at the hitch, and 8 tons on the rear axle. The illinois department of transportation idot uses the aashto hs2044 vehicle to calculate its. Dynamic behavior of integral bridges using sap 2000 a. Pdf the bridge is a basic element of all surface transportation networks. Australian bridges traffic live load design standards. It is commonly called as hs20 44 where h stands for highway, s for semitrailer, 20 ton weight of the tractor 1st two axles and was proposed in 1994 2.

H20 and hs20 loading 8000 lbs 32,000 lbs h20 loading 8000 lbs 32,000 lbs hs20 loading 32,000 lbs 8002331510 dynamic load sample calculation wheel load wl 16,000 lbs 32,000 lb axle 2 dynamic force fd 1. Hl93 is a type of theoretical vehicular loading proposed by aashto in 1993. Abutments should be designed such that the adjoining retaining walls blend. New and young designers dont even know what lfd,asd and hs20 44 are. It consists of two axles weighing 25 kips 110 kn each spaced at 4 ft 1. Hs20 loading table item 6 18 20 30 38 48 60 72 84 96 108 120 144 axle load lbs 32,000 25,000 tire load lbs 16,000 12,500 tire contact area 10 x 20 200 inch. Here we are considering for aashto hs20 44 or alternate military loading interstate loading. Revision r01, march 16, 2018 are the ev2 and ev3 real loads.

Effect of increasing truck weight on bridges rosa p. Quite often, this number 44 is mistakenly assumed to mean 44,000 lbs in some design context. Concentrated load 18 kips for moment 26 kips for shear. Vdot modifications to aashto standard specifications for. Figure 33 design live loading from aashto lrfd specifications 9.