52 / 150
46
G.S.U. =
Glazed Structural Unit.
Gunite =
A proprietary name for
shotcrete.
Hairline cracks =
Very fine cracks, in a random pattern which
usually do not completely penetrate an exposed
layer of concrete. Also called
shrinkage cracks
(when caused by shrinkage).
Hairline joint =
A joint not more than 1/64 in. (0.38 mm) wide.
Hair mortar =
A mortar containing cow’s hair, lime and sand.
Half bat, half brick, snap header =
A brick cut to half its length.
Hard to the line =
Masonry unit set too close to the guide line.
Harsh mortar =
Mortar that is difficult to spread.
Hawk =
A small mortar board.
Header =
A masonry unit laid flat on
its bed surface with end
facing out; also used to tie two wythes together.
Headway =
Clear space under an arch.