This section is from the book "A Practical Treatise On The Joints Made And Used By Builders", by Wyvill J. Christy. Also available from Amazon: Practical treatise on the joints made and used by builders.
False Joint is a face joint occurring in tuck pointing or in the horizontal joints of gauged arches, or in any other way to imitate a real joint, which under these circumstances must be concealed by daubing if too close to the false one.
Filleted Joint is made when fillets of bricks are built up with the substance of the brickwork to cover the edge of the slating instead of depending upon cement or mortar fillets where flashings are not used. The brick fillet oversails about 1# inch, just above the slating, the joint between the fillet and slating being made good with cement.
Flat Joint is formed by pressing the mortar flat as in a flush joint, for which it is another name, and marking the courses with the edge of the trowel. It is common in pointed work and is made in three different ways. The pointing stuff is either laid on with the trowel and cut off at the top only, or it may be cut off both at the top and bottom, or else it is filled in flush and a line run along the centre with a jointer, in which case it becomes a drawn joint.
This has been described under its alternative name of Drawn Joint.
Flat Struck and Jointed Joint is the same as a Flat-ruled Joint, and is executed in some localities by drawing the joint up full without cutting the top off and afterwards running the jointer along the middle with a straight edge. It is advisable to strike joints along their upper edge so as to make the sloping surface a sort of weathering, but the reverse is the common practice.
Flush Joint is one in which the mortar is in the same plane as the face of the bricks. It is made by pressing the mortar flat on the joint, and sometimes in addition the point of the trowel is drawn along the top and bottom, as in Fig. 6.
Coursing joints are flushed solid when the mortar in the inside joints is brought up flush to a level surface throughout. When bricks, however, are only buttered instead of being laid on a bed of mortar properly spread, flushing will not suffice, but grouting must be poured in to reach the vacuities. In some cases thin mortar is used for flushing so as to dispense with grouting.
Flush Jointed Joint is executed by drawing the point of the trowel along the top and bottom on laying the bricks, and afterwards when the mortar is sufficiently set the middle of the joint is flushed flat by running the jointer along a straight edge. Or it may be made by drawing the joint up full without cutting the top off and similarly using the jointer, as shown in Fig. 7.
Full Joint occurs when the mortar approaches the face of the work sufficiently near to be flush. If it does not it is either too full or not full enough, which necessitates raking out the excess or filling in the defect with stopping.