3rd class brick vs the alternatives

Question

What is a third class brick and how does it differ from a 1st or 2nd class brick?

Richard · Answer

Lower quality to 2nd and first they are not as perfectly square and may vary in size and depth slightly and may have visual imperfections

George · Answer

First class bricks
These types of bricks are used for high quality work. The bricks are quite expensive.
To form these types of bricks, good quality materials ranging from clay, silica etc should be utilized.
All the colours like red, brown, cheery etc. should be used uniformly on the first class bricks.
The shapes of first class bricks in regular in edges, face, top, bottom. The shape should be according to standard brick size like 190 mm x 90 mm x 90 mm with adherence to BIS. The corners should be sharp, there should be no pores or cracks on the bricks.
The water absorption capacity for the first class bricks should be under 20%.
The crushing strength of first class bricks should have been 105 Kg

2nd
The types of brick are mainly used in constructing internal walls.
The qualities of these bricks are little less as compared to first class bricks.
These are slightly over burned.
The sizes and shapes are quite different as first class bricks. The edges and corner of these bricks are slightly broken
Water absorption capacity of second class bricks will not surpass 22%.
Compressive or crushing strength of second-class bricks should remain at 70 kg/cm2 otherwise the bricks will be cracked

3rd
These bricks are over burned and their sizes and shapes change as compared to standard brick sizes.
The colours of these bricks are dark and blackish.
The water absorption capacity of these bricks are 25%.
The crushing strength of these bricks remain at 30 kg/cm2
Third class bricks are mainly used for temporary structures.
Their sizes and colours are not uniform.

Daniel · Answer

Hi,
3rd class bricks are exactly what they say they are,usually poor quality and not uniform in shape from the way they are burnt in the kiln.
You wouldn't use them for high quality work,just rough work or temporary structure, you can get 4th class brick which are even worse and are really only good for smashing up for hard-core.

Andrew · Answer

its been rejected 2 times before .size colour thinness straightness .still a good brick

Alan · Answer

1st facing bricks

2rd engineer brick

3rd class brick which is call a common  is not good for rainy area/ more ruff / out of shape hope this helps

Michael · Answer

You would use 3rd class below ground level & class 1 & 2 above ground

Mas · Answer

Third class bricks are mainly used for temporary structures. Their sizes and colors are not uniform. These bricks are over burned and their sizes and shapes change as compared to standard brick sizes. The colors of these bricks are dark and blackish.

Roy · Answer

Third class brick in the trade are known as regrades chipped and all different shapes and sizes. First class brick in in fist class condition second class is okay but might have a few chips

3rd class brick vs the alternatives

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