Architectural and Engineering Glossary
L
A deep wide sink or tub,usually of porcelain,slate,or soapstone;used for washing clothes,etc.
On drawings,abbr.for lavatory.
In monasteries of the Middle Ages,a large stone basin from which the water flowed through a number of small orifices around the edges,for the convenient performance of ablutions before religious exercises or meals.
A place for washing.
1.A Greek Orthodox monastery.2.In a monastery,an assemblage of cells for monks around a common center that contains a church and sometimes a refectory.
As applied to rays of light, sound,or radiant heat which strike a surface:the angle of reflection is equal to the angle of incidence,and the reflected and incident rays are in the same plane with a perpendicular to the surface.
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1.An open space of ground of some size,covered with grass and kept smoothly mown.2.Same as gauze,2.
A system of devices,usually installed below ground level,to scatter or spray water droplets over a lawn,golf course,or the like.
A horizontal glazing bar.
A board which is fixed on the rafters of a pitched roof to take the feet of the rafters,forming a subsidiary roof transverse to the main roof.
A wall panel whose horizontal dimension is greater than its vertical dimension.
1.In reinforced plastics,the reinforcing material placed in position in the mold.2.The resin-impregnated reinforcement.3.The assem bling of veneers for fabrication as plywood.
Same as course.
Same as lear board.
See lath laid-and-set.
The length of an installed pipeline,measured along its centerline.
The elimination of roller marks or brush marks on a wet paint surface by the application of light brush strokes.
The marking of a material,indicating where cuts are to be made,in preparation for work to be done
Laying all the bricks in one course without the use of a cut brick.
In surveying,rotating a level to measure the angle between two intersecting lines.
A glazed opening in a ceiling to admit light (either natural or artificial) to a room below.
A segregated area for infectious medical patients,esp.for their quarantine.
A circular,revolving shelf;some times used in corner kitchen cabinets.
Abbr.for “pound.”
Abbr.for lumber.
1.Abbr.for light center length.2.Abbr.for “less than carload.”
Abbr.for loose cubic meter.
Abbr.for loose cubic yard.
On drawings,abbr.for landing.
A device used in the testing of hydraulic cements to measure soundness.
1.The process of separating a liquid from a solid (as in waste liquid) by percolation into the surrounding soil.2.The process of allowing soluble nutrients to move downward and percolate through the surrounding soil.
A drainage pit with sand and gravel sides constructed to allow water to dissipate.
A cesspool,1 in which the solids present are retained and the liquid seeps into the surrounding soil.
Same as absorption field.
See leaching well.
A pit,or a receptacle having porous walls,which permits its liquid contents to seep into the ground,but retains the solids.
1.One of the sections of a masonry wall built up at each corner;supports a line between them which serves as a guide for constructing the remainder of the wall.2.(pl.) See leads.3.A soft, malleable,heavy metal;has low melting point and a high coefficient of thermal expansion;very easy to cut and work.
See lead wedge.
The welding of sheet lead.
One of a series of opaque pigments,orange to yellow in color,with high tinting strength.
A damp course fabricated of sheet lead.
A device for fastening sheet lead to a stone surface.
One of many organic lead salts which are soluble in paints and varnishes;used to speed the drying and hardening of the oil vehicle.
A flat roof which is covered by lead sheet laid over boarding.
A tape,typically about 1⁄2 inch wide and 0.002 inch thick (12.5 mm 0.05 mm),which is cemented to a window or panel to detect its breakage;forms part of an alarm circuit through which a small electric current flows.If the window or panel is broken,the tape is severed and the circuit is interrupted,thereby activating an alarm.
A leaded light.
A roofing nail having a plain shank;makes a leakproof joint when driven through a metal roof.
White lead ground in linseed oil;formerly in wide use,now replaced largely by titanium dioxide pigments.
A joint in a water pipe in which molten lead has been poured,as in a bell and spigot joint.
Same as litharge.
