3-15. Laying the First Course (Header Course). Below are the steps in laying the header course for a
a. First Step. Lay a l-inch bed of mortar on foundation as shown in Figure 3-18.
Figure 3-18. Spreading mortar on the foundation
b. Second Step. As shown in Figure 3-19, cut and lay two three-quarter closure bricks. Press the
closure brick marked A down into the mortar bed until it makes a bed joint 1/2 inch thick. Next spread
the mortar on the end of the closure brick marked B and position it to form a 1/2-inch- thick head joint
with the closure brick marked A. Check the level of the closure bricks by using a level at the points
indicated by the heavy dotted lines. The edges of the closures bricks must be even with the outside face
of the foundation.
Figure 3-19. Laying three-quarter closure bricks