From previous post we are reviewing the masonry work.( Read: Laying bricks for building success)
This article takes the reader to the next level :Understanding Stone masonry.
The Stone Masonry:
Everyone likes the aesthetics and the grace of the stone walls. The sturdy facade which a stone wall creates is incomparable to any other form .Stone masonry uses the natural stones and hence may be we move forward towards the direction of the nature or may be, the stone wall reminds us of our forgotten past when we used to live inside the stone caves.
There are 4 distinct methods in stone masonry depending on whether the stone [ which is also called as Rubble] has been dressed ( shaped) or is used as it is ( no shape given after breaking in quarry)
A.With dressed stones:
2.Coursed Rubble masonry( CR)
Ashlar is more refined as compared to coursed rubble masonry. Ashlar has greater dimensional control and is more appealing from aesthetics point of view.
Both are normally used for monumental works or public buildings.
Why ashlar or coursed rubble masonry are not suitable for modern buildings ?
1.Skilled masons to dress the stone are not available.
2.Productivity is quite less.
3.Dead weight of walls is much higher
In short when cost constraints are not there , adequate time is available and most important, magnificent looks are important directly go for Ashlar or UCR masonry.
3. Un-Coursed Rubble masonry ( UCR)
4.Random rubble masonry ( RRM)
There is not much difference between UCR and RRM . However, note the following:
1.UCR is better in overall appearance than RRM and hence as a convention it is used for walls above the plinth .
2.RRM is used for wall foundations or retaining walls since the looks are not important.