All of the laterite must be standardized by the quality control system. Classification
of the grading of laterite will be decided: A, B+, and B. These three different grades
will be used on different areas as specified and working drawings.
A grade – for outside exterior-wall and inside sight-wall. The allowance hole is
maximum 4 cm horizontal and 1 cm.
B+ grade – for inside-wall with laterite-dust fillings of holes
B grade – for inside-wall behind cardboard walls.
All grades shall have a coherent red color without larger fragments or white and
dark inlays.