What is H25 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 H20 S16 loading?
In specifications prior to 1965, the HS20-44 loading was designated as H20-S16-44, with the S16 identifying the gross axle weight of the semi-trailer in tons. The H and HS vehicles do not represent actual vehicles, but can be considered as “umbrella” loads.
What is H-20 vehicle loading?
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 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 a H20 load rating?
H20 or “Traffic-Rated”- Heavy duty traffic rating. Commonly known as H-20, HS-20, traffic rated or heavy duty (HD). Designed for a 16,000 lb. wheel load (32,000 lb. dual spaced wheel load)
What is H10 loading?
Another example of a small vehicular live load is a maintenance vehicle that weigh 5,000 lbs. AASHTO H-10 vehicle weighing 20,000 lbs: 16,000 lb and 4,000 lb axles with a minimum 72-inch wheel base.
What is a design tandem?
2. Design Tandem: It consists of two axles weighing 25 kips (110 KN) each spaced at 4 ft (1.2 m)
How big is an axle on a H25 truck?
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. Figure 1 below illustrates the axle load and spacing breakdown for both HS20 and HS25 design trucks.
What kind of load is HS-20 design truck?
This theoretical live load (HL93), defined as the “Design Truck”, is an HS-20 load or 16,000 lbs. applied to a 10” x 20” surface load pad. This is one of the factors included in the standard, in addition to dead load (soil weight), surcharge loads, and all applicable load/safety factors.
Why do we use the hs-25 classification?
As with most stormwater management topics, this explanation has both a simple and a detailed answer. The simple answer is that we use the HS-25 classification to rate the strength of a system so that we know where it can be used and how much loading it will be able to handle.
What is the AASHTO hl93 live load model?
AASHTO HL93 is the theoretical live load model applied in the AASHTO bridge analysis standards for Load and Resistance Factor Design (LRFD). The LRFD for bridge design is the broader standard utilized for both bridge and subsurface system analysis.