Table of Contents
What is Class A and Class AA loading?
IRC Class A Loading This type of loading is used in the design of all permanent bridges. It is considered as standard live load of bridge. When we design a bridge using class AA type loading, then it must be checked for class A loading also.
What is r in bridges?
An R-Posted Bridge is one, which based on design or condition, does not have the reserve capacity to accommodate most vehicles over legal weights, but can still safely carry legal weights. These bridges are identified with signage stating “No Trucks with R Permits.”
What is the weight of tracked vehicle in IRC Class AA loading?
IRC Class AA This load represents a tracked vehicle (simulating an army tank) of 700 kN or a wheeled vehicle (heavy duty truck) of 400 kN.
What is IRC 70R?
IRC CLASS 70R LOADING: This loading is to be normally adopted on all roads on which permanent bridges and culverts are constructed.
What is IRC loading?
Explanation: IRC Class A Loading. (i) This type of loading is used in the design of all permanent bridges. It is considered as the standard live load of the bridge. When we design a bridge using class AA type loading, then it must be checked for class A loading also.
What is free board in bridge?
Freeboard at a bridge is the minimum clearance between the bottom of the girders and the design highwater or ice elevation.
What is the suitable free board for girder bridge?
For aggregating rivers in Himalayan foothills and flood-prone northeastern areas, north Bengal, etc the freeboard shall be suitably increased….Detailed Solution.
| S. No. | Types of bridge | Free Board |
|---|---|---|
| 1. | Arch bridge | 30 com |
| 2. | Girder bridge | 60 – 90 cm |
| 3. | Navigable bridge | 240 – 300 cm |
| 4. | High level bridge | 60 cm = 600 mm |
What is scour depth?
Explanation: Maximum Scour depth: Scour may be defined as the removal of material from the bed and banks of streams during the passage of flood discharge when the velocity of the stream exceeds the limiting velocity that can be withstood by the particles of the bed materials.