Civil Engineering ⇒ Topic : Masonry
JOINTS STONE MANSORNY
2. LAP JOINT
|Masonry : The construction work made by stone or brick
is termed as masonry structure. It is divided into
(i) Stone masonry (ii) Brick masonry
(i) Stone masonry : When rock is quarried out and given rough shape at the quarries it is called stone masonry. It is divided into :-
1. Dry masonry
2. Ashlar masonry
3. Rubble masonry.(ii) Brick masonry : The construction done with bricks bonded together with the help of a mortar is termed as brick masonry. The bricks are thoroughly soaked in water for atleast one hour before use.
Backing : It is the inside of a wall.
Bat : A portion of a brick cut across the width is called bat.
Bed : It is the flat bottom side of the brick.
Bond : The method of arranging bricks so that the individual units are tied together is called bond.
Closer : A portion of a brick cut longitudinally with one long face uncut.
Course : It is the layer of bricks laid on the same bed.
Cow nose : The brick with two rounded edges used in quoin etc.
Facing : Exposed surface of a wall.
Hearting : Part of the wall between facing and backing.
Queen closer : It is placed next to the first brick in a header. This is half brick cut longitudinally.
King closer : It is used for splaying brick work.
Bevelled closer : It has one stretcher face closed.
Frogs : These are indentations on the bricks so as to form a key for holding the mortar.
Header : This denotes the end of a brick as seen in the wall face.
Quoin : A corner or the external angle of a wall.
Stretcher : The side of a brick as seen in elevation in a wall where the brick is laid flat.
Bed surface : The surface of a stone perpendicular to the line of pressure.
Corbel : A piece of stone projecting from a wall to support a structural member.
String course : This is a continuous course of masonry projecting from the face of the wall and is provided to throw off water.
Templates : These are pieces of stone placed under the end of a beam to distribute the load over greater area.
Throating : Grooves cut on the under surfaces of sills, copings, string courses etc. to prevent the water from trickling down the walls.
Joints in ashlar masonry : Since ashlar masonry is built Lip of stones carefully dressed, it has narrow joints.
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