L definitions - Building Terms Dictionary



L definitions - Do you know architectual drafting or building terms starting with the letter "L"?

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Labyrinth:
A cladding joint design in which a series of interlocking baffles prevents drops of water from penetrating the joint by momentum.
Lacquer:
A coating that dries extremely quickly through evaporation of volatile solvent.

Lagging:
Planks placed between soldier beams to retain earth around an excavation.

Lag Screw:
A large-diameter wood screw witha square or hexagonal head.

Laminate:
As a verb, to bond together in layers; as a noun, a material produuced by bonding together layers of material.

Laminated glass:
A glazing material consisting of outer layers of glass bonded to an inner layer of transparent plastic.

Laminated vaneer lumber (LVL):
Wood members that are made up of thin wood veneers joined with glass.

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Landing:
A platform in or at either end of a stair.

Lap Joint:
A connection in which one piece of material is placed partially over another piece before the two are fastened together.

Lateral Force:
A force acting generally in a horizontal direction, such as wind, earthquake, or soil pressure against a foundation wall.

Lateral thrust:
the horizontal component of the force produced by an arch,dome,vault, or rigid frame.

Latex caulk:
A low-range seakent based on a synthetic latex.

Lath ( rhymes with "math"):
A base material to which plaster is applied.

Lathe (rhymes with "bathe"):
A machine in which a piece of material is rotated against a sharp cutting tool to produce a shape,all of whose cross sections are circles; a machine in which a log is rotated against a long knife to peel a continuous sheet of veneer.

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Lather ( rhymes with "rather"):
One who applies lath.

Lay-in panel:
A finish ceiling panel that is installedmerely by lowering it onto the top of the metal grid components of the ceiling.

Lead ( rhymes with "bead"):
In masonry work, a corner or wall end accurately constructed with the aid of a spirit level to serve as a guide for placing the bricks in the remainder of the wall.

Leader ( rhymes with :feeder"):
A vertical pipe for conducting water from a roof to a lower level.

Leaf:
The moving portion of a door.

Lehr:
A chamber in which gall is annealed.

Let-in bracing:
Diagonal bracing that is nailed into notches cut in the face of the studs so that it does not increase the thicknes of the wall.

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Level cut:
A saw cut that producs a level surface at the lower end of a sloping rafter when the rafter is in its final position.

Leveling plate:
A steel plate placed in grout on top of a concrete foundation to create a level bearing surface for the lower end of a steel column.

Lewis:
A device for lifting a block of stone by means of friction against the sides of a hole drilled in the top of thee block.

Life-cycle cost:
A cost that takes into account both the first cost and the costs of maintenance,fuel,consumed,monetary inflation, and interest over the lifetime of the object being evaluated.

Lift-slab construction:
A method of building multistory sitecast concrete buildings by casting all the slabs in a stack on the ground, then lifting them up the columns with jacks and welding them in place.

Light:
A sheet of glass.

Light-gauge steel stud:
A length of thin sheet metal folded into stiff shape and used as wall framing member.

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Lignin:
The natural cementing substance that binds together the cellulose in wood.

Limestone:
A sedimentary rock consisting of calcium carbonate, magnesium carbonate, or both.

Linear metal ceiling:
A finish ceiling whose exposed fce is made up of long, parallel eements of sheet metal.

Liner:
A piece of marbel doweled and cemnted to the back of another sheet of marble.

Line wire:
Wire stretched across wall studs as a base for the application of metal mesh and stucco.

Linoleum:
A reilient floorcovering material composed primarily of ground cork and linseed oil on a burlap or canvas backing.

Lintel:
A beam that carries a load of a wall across a window or dor opening.

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Liquid sealant:
Gunnable sealant.

Live load:
The weight of snow, people, furnishings, machines, vehicles, and goods in or on a building.

Load:
A weight or force acting on a structure.

Loadbearing:
Supporting a superimposed weight or force.

Load indicator washer:
A disk placed under the head or nut of a hight-strength bolt to indicate sufficient tensioning of the bolt by means of the deformation of ridges on the surface of the disk.

Lockstrip gasket:
A synthetic rubber strip compressed around the edge of a piece of glass or a wall panel by inserting a spline(lockstrip) into a groove in the strip.

Lookout:
A short rafter,running perpendicular to the other rafters in the roof, which supports a rake overhang.

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Louver:
An array of numerous sloping,closely spaced slats used to diffuse air or to prevent the entry of rainwater into a ventilating opening.

Low-emissivity coating:
A surface coating for glass that permits the passage of most shortwave electromagnetic radiation (light and heat), but reflects most longer-wave radiation ( heat).

Low-lift grouting:
A method of constructing a reinforced masnory wall in which the reinforcing bars are embedded and grouted in increments not higher than 4feet (1200 mm).

Low-range sealant:
A sealant that is capable of only a slight degree of elongation prior to rupture.

Low-slope roof:
A roof that is pitched at an angle so near to horizontal that it must be made waterproof with a continuous membrane rather than shingles, commonly and inccurately referred to as a flat roof.

Luffing-boom crane:
A heavy-dutty lifting device that uses a tower-mounted boom that may rotate in any vertical plane as well as in a horizontal plane.


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