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JOINT DETAILS AND WALL PATTERNS

A wide variety of architectural effects can be produced by using various wall patterns in combination eith suitable joint details. A few patterns are shown and it is hoped that the designer will be stimulated to create his own wall and joint details.

WALL PATTERNS

Stack Bond

In stack bond with standard units there is direct vertical core alignment and also vertical block alignment. In using the stack bond pattern it is advisable to use open end block. Stack bond may also be obtained by using scored blocks and running bond.

Common Bond, Coursed Ashlar, Random Ashlar

Pattern designs as illustrated on page D3 vary from the simple and more common bond forms to the complex random ashlar type. All of these patterns have direct vertical core alignment. Where continous horizontal mortar joint lines are shown. It is possible to use 7/16" and 1/2" horizontal mortar joints, but in using the more complex ashlar patterns the standard 3/8" modular joints must be used.

MORTAR JOINTS & TOOLING

Tooling will compress the mortar firmly against the block, thereby assuring bond between mortar and blocks to prevent moisture infiltration into the wall. To insure weather-tightness, it is recommended that the excess mortar be struck downward with the trowel (rather than upward), then the flush face rubbed with a carpet-faced wood float.

Joint 6 should only be used in garden walls, interiors, or weather protected walls since the ledge collects water. The effective thickness of the wall is reduced with the use of this joint and engineering calculations should be carefully checked.

Joints 6, 7, and 8 are not recommended as they are not weathertight, but these joints can be satisfactorily used in garden walls, interior walls, or weather-protected walls.

To create a long and low effect in a wall, the "V" or concave horizontal mortar joint may be used with a flush or sacked vertical joint. The tool for making the concave "V" joints should be 24" long, which length will span from one block to another, helping to keep the horizontal lines straight.

 

 
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