=41. Mackite= is a fireproofing material used for partitions in very
much the same way as terra cotta. As this material is put in place by
bricklayers, its cost will be taken up here.
Where there are many openings, two bricklayers and one laborer can set
240 square feet of mackite in 8 hours; in a straight wall, without
openings, these same men can set about 400 square feet. The market
price for 2" × 12" × 30" blocks is 6 cents per square foot; for blocks
3 inches thick, it is 8 cents per square foot. The average price for
both material and labor for 2-inch mackite is 10 cents per square foot;
for 3-inch material it is about 12 cents per square foot.