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 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 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 is HL93 loading?

HL-93 is a type of theoretical vehicular loading proposed by AASHTO in 1993. It is used as the design loading for highway structures in USA and other countries where AASHTO code is followed. AASHTO HL-93 vehicular live load is a combination of three different loads, HL-93 Design Truck (formerly, HS20-44 Truck)

What is the difference between HL 93 and HS20?

The HL93 “design truck” wheel load is the same as the HS20 wheel load. The HL93 “design tandem” wheel load is 12,500 pounds compared with the “Alternate Military Load” of 12,000 pounds. The extra 500-pound wheel load is not a large increase and will only affect those designs that did not have excess capacity.

What is H10 load rating?

Light raffic rated covers will support up to 16,000 lbs/axle load, which is an AASHTO H10 rating. Concrete covers utilize threaded inserts for machine assisted lifting. Many other sizes and traffic ratings are available.

What does H25 pound mean?

An “H20” truck only has one axle under the trailer and a total load of 40,000 pounds. An “H25” or an “HS25” series truck will be almost identical – except the drive axle will be 10,000 pounds and the axle(s) under the trailer will be 40,000 pounds each.

What is h15 loading?

Most bridges in the United States were designed to accommodate either an H-15 or HS-20 loading. An H-15 loading is represented by a two-axle single unit truck weighing 30,000 pounds (15 tons) with 6,000 pounds on its steering axle and 24,000 pounds on its drive axle.

What is an H 25 live loads?

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 H and HS loading according to AASHTO?

The simple difference is an “H” series truck is a two-axle truck, while an “HS” series truck has multiple loaded axles (i.e. a semi-trailer vehicle). Quite simply, the number following the “H” is the gross tonnage of the design vehicle.

What is load rating for bridges?

Load rating is the measure of a bridge’s ability to carry a given live load. Knowledge of the capacity of each bridge is critical for its proper functioning.

How much is H25 load capacity?

What does a load mean?

1 : something lifted up and carried : burden. 2 : the quantity of material put into a device at one time He washed a load of clothes. 3 : a large number or amount They collected loads of candy on Halloween. 4 : a mass or weight supported by something.

How much is h20 loading?

H-20 Loading: American Association of State Highway Transportation Officials (AASHTO) published its bridge design criteria, commonly known as H-20 or HS-20. It consists of truck axle loading of 32,000 lbs, or wheel loading of 16,000 lbs.

What is load rating?

The Load Rating or Load Index indicates how much weight each tire can safely support. Every tire’s load rating is stamped into its sidewall, usually after the words “Max Load”. Sometimes this will be given in pounds (lb) or kilograms (kg), but it is often given as a rating code — a number between 71 and 110.

What is lane loading?

What are the different types of loads?

Different types of loads in buildings and structures

• Different types of loads. The loads in buildings and structures can be classified as vertical loads, horizontal loads and longitudinal loads.
• Dead load.
• Live load.
• Wind load.
• Snow load.
• Earthquake load.
• Load combination.
• Special loads.

What is h-20/hs-20 loading?

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 is the difference between a HS20 and a 44?

In both cases the “44” stands for 1944, the year the loading was adopted. H20 truck is a 20T truck; two axles, 4T & 16T, spaced at 14′. HS20 is a 36T truck It’s the H20 truck with an additional 16T axle with a variable spacing of 14′ to 30′, whichever produces maximum stress.

What does hs20-44 stand for?

There’s H20-44 and HS20-44. In both cases the “44” stands for 1944, the year the loading was adopted. H20 truck is a 20T truck; two axles, 4T & 16T, spaced at 14′.

What does 44 stand for on a Ford H20?

In both cases the “44” stands for 1944, the year the loading was adopted. H20 truck is a 20T truck; two axles, 4T & 16T, spaced at 14′.