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L BOLTS
Large steel bolts, also called anchor bolts, attached to a building and then anchored in concrete. This is done to prevent the structure from moving.

L CUT
A piece of tile cut or shaped to the letter "L".

L SCREW
Metal thin rod, possibly of brass, which has a screw thread on one, with the other end bent at a right angle. When screwed into the wall, the short end of the L provides a support for hanging objects.

L TUBING
An industry standard for copper tubing defined by the tube wall thickness and identified by a "blue" strip. Type "L" copper tube wall is approximately 50% greater thickness than Type "M".

LABOR BURDEN
Employer's charges for employee benefits, wages, taxes, insurance, etc.

LABOR HOUR
A standard in which one person's labor is performed in one hour.

LACHES
Doctrine of laches, is the failure to timely assert one's rights or claim in any given matter. This failure to take action on a timely basis misleads an adverse party that no breach has occurred.

LACING
Interweaving of roof shingles at intersections.

LACK OF FUSION
Poorly done weld, which has areas of incomplete weld fusion, where the weld isn't fused to the base metal in all places, making the strength of the weld weaker.

LACQUER
(1) Substance, consisting of such resinous materials as ether, shellac, gum, and alkyd resins dissolved in alcohol or other solvent, which will evaporate rapidly when, applied, leaving a tough, adherent film with a hard, smooth coating on such items as wood furniture. (2) Resinous varnish.

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