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Friday, 2 February 2018

BRICK MASONRY

Brick masonry is built with bricks bonded together with mortar. For temporary sheds mud mortar may be used but for all permanent buildings lime or cement mortars are used.
The various types of bonds generally used in brick masonry are
1. Stretcher bond
2. Header bond
3. English bond and
4. Flemish bond.


1. Stretcher Bond: A stretcher is the longer face of the brick as seen in the elevation. In the
brick of size 190 mm × 90 mm × 90 mm, 190 mm × 90 mm face is the stretcher. In stretcher
bond masonry all the bricks are arranged in stretcher courses as shown in Fig. 8.4. However
care should be taken to break vertical joints. This type of construction is useful for the
construction half brick thick partition wall.
2. Header Bond: A header is the shorter face of the brick as seen in the elevation. In a standard
brick it is 90 mm × 90 mm face. In header bond brick masonry all the bricks are arranged in
the header courses as shown in Fig. 8.5. This type of bond is useful for the construction of
one brick thick walls.
3. English Bond: In this alternate courses consist of headers and stretchers. This is considered
to be the strongest bond. Hence it is commonly used bond for the walls of all thicknesses. To
break continuity of vertical joints a brick is cut lengthwise into two halves and used in the
beginning and end of a wall after first header. This is called queen closer. [Ref. Fig. 8.6].
Figure 8.6 shows typical one brick and one and half brick thick wall with English bond.

4. Flemish Bond: In this type of bond each course comprises of alternate header and stretcher
[Fig. 8.7]. Alternate courses start with stretcher and header. To break the vertical joints queen
closers are required, if a course starts with header. Every header is centrally supported on the
stretcher below it.
Flemish bonds may be further classified as
(a) Double Flemish Bond
(b) Single Flemish Bond.
In case of double flemish bond, both faces of the wall have flemish look, i.e. each course consist
of alternate header and stretcher, whereas single flemish bond outer faces of walls have flemish look
whereas inner faces have look of English bond [Fig. 8.7 (a), (b)].
Construction of flemish bond needs greater skill. It gives more pleasing appearance. But it is not
as strong as English bond. If only pointing is to be used for finished wall, flemish bond may be used to get good aesthetic view. If plastering is going to be used, it is better to use English bond.

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