## Important Points to Remember for Eccentric Footing, Cantilever Footing or Shoe Footing

Some days ago I have posted a Picture of an eccentric isolated foundation and I asked my fans on facebook that whether it is right to place an isolated column foundation like this or not? As a result I have ...

## What is a difference between a tie Beam and a Plinth Beam?

Basic difference between plinth beam and tie beam is that tie beam can be at any level but plinth beam is at plinth level. But wait that is just the basics of many other differences that exists between both tie ...

## how should the guided bearings in piers of the curved region be oriented with respect to the fixed bearing in abutment?

To determine the orientation of guided bearings, one should understand the movement of curved region of a prestressed bridge. Movement of prestress and creep are tangential to the curvature of the bridge (or along longitudinal axis) while the movement due ...

## What are the advantages of piers constructed monolithically with the bridge deck over usage of bearings?

Basically, piers constructed monolithically with the bridge deck are advantageous in the following ways: (i) Movement of the bridge deck is achieved by the bending deformation of long and slender piers. In this way, it saves the construction cost of ...

## Are diaphragms necessary in the design of concrete box girder bridges?

Diaphragms are adopted in concrete box girder bridges to transfer loads from bridge decks to bearings. Since the depth of diaphragms normally exceeds the width by two times, they are usually designed as deep beams. However, diaphragms may not be ...

## What is the advantage of sliding bearings over roller bearings?

In roller bearing for a given movement the roller bearing exhibit a change in pressure centre from its original position by one-half of its movement based on David J. Lee.  However, with sliding bearing a sliding plate is attached to ...

## Why is the span length ratio of end span/approach span to its neighboring inner spans usually about 0.75?

From aesthetic point of view, an odd number of spans with a decrease in length in the direction of abutment is desirable. Moreover, spans of equal length are found to be boring. However, the arrangement of irregular span lengths is ...

## In the design of a simply supported skew bridge, which direction of reinforcement should be provided?

In the conventional design of steel reinforcement for a simply supported skew bridge, a set of reinforcement is usually placed parallel to free edge while the other set is designed parallel to the fixed edge. However, this kind of arrangement ...

## What are the functions of different components of a typical expansion joint?

We all know that concrete is vulnerable to temperature changes it usually shrinks and expands due to some temperature variations, in such a condition most of the times a crack is intentionally introduced so that any expansion or shrinkage in ...

## Under what situation shall engineers use jacking at one end only and from both ends in prestressing work?

Prestressing is now a must-to-have phenomenon in every mega project whether it includes flyovers or dam or whatever. During the design procedures a very important question that arises in the mind of the engineer is; whether to use jacking at ...