What is a Class 1 bridge? Previously known as a ‘class 1’ bridge loading, this option is often used for residential and farm access and is suitable for rural roads which have low traffic volumes.
What is a Class 1 bridge?
Previously known as a ‘class 1’ bridge loading, this option is often used for residential and farm access and is suitable for rural roads which have low traffic volumes. These bridges can service up to 15 homes (but after that a heavier HN-HO-72 load rating is required). Speed is limited to 70km/hr.
What is the load of a bridge?
girder: The “beam” of a bridge; usually horizontal member. load: Any of the forces that a structure is calculated to oppose, comprising any unmoving and unvarying force (dead load), any load from wind or earthquake (environmental load), and any other moving or temporary force (live load).
What is Ha and Hb loading?
Only one HB vehicle is considered to load any one superstructure. The vehicle is positioned within one notional lane or straddles two notional lanes in order to obtain the worst effect on the member. HA loading is placed in any remaing lane not occupied by the HB vehicle.
What is an SV80 vehicle?
These represent vehicles with nominal axle weights not exceeding 16.5 tonnes. SV80 has a maximum gross weight of 80 tonnes with a maximum basic axle load of 12.5 tonnes. SV100 has a maximum gross weight of 100 tonnes with a maximum basic axle load of 16.5 tonnes.
What is HN Ho 72?
HN-HO-72 is the accepted traffic loading design specification as per Transit New Zealand’s Bridge Manual. HN is normal load, HO is overload.
What are the 3 types of loads on a bridge?
There are 3 kinds of forces that operate on any bridge: the dead load, the live load, and the dynamic load.
What is a knife edge load?
b) Knife edge load. This load (Figure 5) is usually associated with the uniform distributed load. It does not represent a single axle load, but is a device to ensure that, together with the uniform distributed load, the vertical shear and the longitudinal moments that may occur in real bridge elements are produced.
What is SV loading?
IRC has introduced new Special Vehicle (SV) class loading for select corridor where passage of trailor vehicle carrying stator units, turbine, heavy equipment & machinery etc.
What is standard axle load?
A standard truck has two axles, front axle with two wheels and rear axle with four wheels. For highways the maximum legal axle load in India, specified by IRC, is 10 tonnes. Standard axle load: It is a single axle load with dual wheel carrying 80 KN load and the design of pavement is based on the standard axle load.
What are the different types of load for a bridge?
Various design loads to be considered in the design of bridges are: Dead load. Live load. Impact load. Wind load. Longitudinal forces. Centrifugal forces. Buoyancy effect.
How is Class AA loading used in bridge design?
This type of loading is considered for the design of new bridge especially heavy loading bridges like bridges on highways, in cities, industrial areas etc. In class AA loading generally two types of vehicles considered, and they are This type of loading is used in the design of all permanent bridges.
Which is the load model for Eurocode bridge?
The Groups are referenced gr1a, gr1b, gr2, gr3, gr4, gr5 and gr6 and the load models used in each group are listed in Table N.A.3 of the UK NA (this overwrites Eurocode EN1991-2 Table 4.4a). 5. Group gr1a Load Model 1 is combined with footway loading.
How big should a load model 3 bridge be?
If the structure is to be designed for abnormal loads then vehicles from Load Model 3 will need to be considered. The UK National Annex describes two groups of vehicles, SV and SOV vehicles. These represent vehicles with nominal axle weights not exceeding 16.5 tonnes.