The arrangement of bricks in walls of different thickness made in a common bond; 1 - stretcher layer, 2 - head layer.
Walls of different thickness. The common bond is also known as block or anvil bond. In common bonding, stretcher layers in walls with a thickness 1 bricks and thicker ones are alternately covered with head layers. The vertical joints of one layer are shifted in relation to the joints of the next layer by 1/4 bricks. In thick walls 1 The bricks of the layers can be arranged alternately in stretchers and heads, or only in heads, and in thick walls 1/2 all layers of bricks are stretcher bars, and the offset of the cross seam is 1/2 bricks.
The beginning or end of the masonry layers are made with three-quarter bricks (nines); by using nines, a shift of the joints is obtained in the successive layers. The stretcher layer begins and ends only with three-quarter lines, head layer in masonry with a thickness 1 bricks begin with a solid brick, and in thicker walls with two pairs of three-quarter rounds arranged in heads, and in walls of thickness 2 and more bricks of a pair of three-quarter rounds are laid in the corners, solid bricks are laid between them.
Walls crossing and connected at the corners. When constructing walls that intersect and wall corners, the principle of mutual penetration of walls is applied. Penetration rules require the following conditions to be met:
a) the stretcher layer of one wall goes through, and the head layer of the second wall is only added to it,
b) in the carriage layer, that is, passing through, vertical transverse joints should be shifted by 1/4 or 3/4 bricks from the edge of the second wall.
Walls intersecting at right angles: a) horizontal stretcher layer, b) horizontal head layer.
Two layers of masonry in the straight corner.
Two T-shaped walls are connected according to the same principle. The layers of the transverse wall going through have their ends made of nines arranged in stretchers.
T-shaped walls: a) horizontal stretcher layer, b) horizontal head layer.
The rectangular corner is made according to the rules applicable to the binding of walls intersecting at right angles. The stretcher layers of each wall are finished with nines arranged in stretchers.
When the wall joins the corner at an acute or obtuse angle, it is necessary to trim the top layer touching bricks at the point where the layers cross.. The connection of the walls in the acute corner is shown in the drawing.
The connection of the walls in the corner at an acute angle: a), b) masonry layers.