Laying should include block laid in half lap, level with the line, and with consistent line clearance, keeping the bottom of each block flush with the top of the course below.

Process/Skill Questions:

What is the standard lap when laying concrete masonry units in the stretcher position?
What are line dogs?

NCCER Masonry Standards

Level One, Module Six (28105-13): Masonry Units and Installation Techniques

This module describes characteristics of block and brick; how to set up, lay out, and bond block and brick; how to cut block and brick; how to lay and tool block and brick; and how to clean block and brick once they have been laid. This module also provides information about masonry reinforcements and accessories that masons use on the job to lay block and brick professionally and safely.