What is ___________?

 

Definition

v  What is abutment?

Abutment is a sub-structure component which supports the end of a superstructure and

retains part or whole of the bridge approach fills.

 

v  What is Approach?

It is a part of road which connects the road to the abutment of the bridge.

 

v  What is Approach Slab?

An approach slab is a transition slab of reinforced concrete laid on immediate approaches to

a bridge with one end resting on dirt wall/abutment

 

v  What is Afflux?

Afflux is the rise in the flood level of the channel, immediately on the upstream of a bridge,

as a result of obstruction to natural flow caused by the construction of a bridge and its

approaches

 

v  What is Bridge?

A bridge is a structure having a total length of above 6 m for carrying traffic or other moving

loads across a channel, depression, road or railway track or any other obstruction.

 

v  What is Culvert?

Culvert is a structure having a total length of up-to 6 m between outer faces of walls, measured

at right angles. Cross drainage structures with pipes will be termed as culvert, irrespective

of length.

 

v  What is Bearing?

Bearing is a part of bridge structure which bears directly all the forces from the superstructure

above and transmits the same to the supporting substructure

 

v  What is Camber?

Camber is transverse inclination given to the cross-section of the carriageway so as to ensure

its proper drainage

 

v  What is Causeway?

Causeway is a paved submersible structure with or without openings (vents) which allows

flood/water to pass through and/or over it.

 

v  What is Cofferdam?

Cofferdam is a temporary structure built for the purpose of excluding water or soil from

working area to permit construction without the need for excessive pumping.

 

v  What is Dirt Wall?

Dirt wall is a vertical wall projecting from abutment cap to prevent spill of earth/pavement

materials and also to support approach slab.

 

 

v  What is Effective Linear Waterway?

Effective linear waterway is the total width of waterway of bridge at Highest Flood Level

(HFL) minus the effective width of obstruction.

 

v  What is Highest Flood Level (HFL)?

Highest flood level is the level of highest flood recorded/observed or calculated from the

design discharge, whichever is higher

 

v  What is High Level Bridge?

A high-level bridge is a bridge which carries the roadway above the Highest Flood Level (HFL)

of a channel (including afflux) or the high tide level, with appropriate vertical clearance.

 

v  What is Full Supply Level (FSL)?

Full supply level is the water level corresponding to the full supply of canal.

 

v  What is Free Board?

Free board at any point is the difference between the highest flood level after allowing for

afflux, if any, and the formation level of road embankment on the approaches or top level of

guide bunds at that point.

 

v  What is Interchange?

Interchange is a system of interconnecting roads (ramps and loops) in conjunction with one

or more grade separations that provide for the uninterrupted movement of traffic between two

or more roads.

 

v  What is Invert?

An invert is that part of a pipe or sewer below the springing line, generally the lowest point of

the internal cross section

 

v  What is Ordinary Flood Level (OFL)?

Ordinary flood level is the level to which the stream/river generally rises during monsoon

period every year.

 

v  What is Right of Way (ROW)?

Right of way is the land made available and/or acquired for development of road

 

v  What is Road Over Bridge (ROB)?

Road Over Bridge is a bridge built over the Railway tracks.

 

v  What is Road Under Bridge (RUB)?

Road under bridge is a structure built beneath the Railway tracks.

 

v  What is Kerb?

A line of raised concrete section, forming an edge between carriageway and railing/footpath/

median

 

v  What is Kerb Shyness?

Kerb shyness is the imaginary distance by which the driver would generally keep his vehicle away from the kerb in order to avoid brushing with the kerb

v  What is Kerb Toe Wall?

 

Toe wall is a wall built at the end of the slope of earthen embankment to prevent slipping of

earth and/or pitching

 

v  What is Kerb Toe Underpass?

Underpass is a structure allowing uninterrupted movement of traffic beneath a reference

roadway. An underpass is classified as Cattle Underpass (CUP), Pedestrian Underpass

(PUP) and Vehicular Underpass (VUP) depending on principal user.