|
I IGNEOUS - One of the three main classifications of rock (igneous, sedimentary and metamorphic), solidified from molten state, as granite or lava. INCISE - To cut inwardly or engrave, as in an inscription. - J JACK ARCH - One having horizontal or nearly horizontal upper and lower surfaces. Also called a flat or straight arch. JOINT - The space between stone">stone units, usually filled with mortar. Types include: JUMPER - In ashlar patterns, a piece of stone">stone of higher rise than adjacent stone">stones, used to end a horizontal mortar joint at the point where it is set. - K KEYstone">stone - The last wedge-shaped stone">stone, or voussoir, placed in the crown of an arch. - L LAVA - A general term applied to igneous rocks such as basalt and rhyolite, that erupted from the earth by volcanic action. LEAD BUTTONS - Lead spacers in solid horizontal joints to support the top stone">stones until the mortar has set. LEWIS BOLT - A tapered head wedged in a tapered recess in stone">stone for hanging soffit stone">stones. LEWIS HOLES - Holes in cut stone">stones for lifting and support during the setting of cut stone">stones and sometimes for permanent support. Holes are checked for the particular lewis (lifting device or hook) to be used. LIMESTONE">STONE - A sedimentary rock composed of calcium carbonate; includes many varieties. (See oolitic limestone">stone; dolomitic limestone">stone; crystalline limestone">stone). LINERS - Structurally sound sections of marble that are cemented to the back of marble veneer slabs to give greater strength, additional bearing surface, or to increase joint depth. LINTEL - A stone">stone beam or horizontal member spanning the top of an opening, such as a doorway or window, and supporting the wall above it. LIPPAGE - A condition when one edge of a stone">stone is higher than the adjacent edge. LUG SILL - A stone">stone sill set into the jambs on each side of a masonry opening. |
Glossary About Stone Industry (I~L)