u

U bend U bolt U factor U gauge U stirrup U value U-shaped abutment U-tube manometer U-type expansion bend ultimate adfreeze ultimate bearing capacity ultimate carrying capacity of pile ultimate factor of safety ultimate limit state ultimate load ultimate load analysis ultimate load conditions ultimate load design ultimate loading ultimate moment ultimate point capacity ultimate pullout capacity ultimate resistance ultimate resisting moment ultimate runway capacity ultimate settlement ultimate shear stress ultimate shrinkage ultimate static frictional resistance ultimate static pile point capacity ultimate strength ultimate stress ultimate tensile strain ultimate tensile strength ultimate tensile stress ultimate tension ultimate-strength design ultra-high-strength concrete ultrafiltration ultramarine blue ultrasonic examination ultrasonic flowmeter ultrasonic frequency ultrasonic generator ultrasonic graded veneer ultrasonic inspection ultrasonic leak detector ultrasonic machining ultrasonic pulse velocity method ultrasonic test ultrasonic testing ultraviolet radiation umbra umbrella roof umbrella shell umbrella-type shell unassertive building unbalance unbalanced force unbalanced load unbalanced moment unbarked wood unbolt unbonded mat unbonded member unbonded post-tensioning unbonded posttension construction unbonded tendon unbounded domain unbounded elastic body unbounded region unboundness unboundness of the domain unbraced length unbuckled configuration unbuilt area uncased grillage uncased pile uncenter unclad structure unconfined aquifer unconfined groundwater uncontrolled crest spillway uncontrolled development uncontrolled pedestrian crossing uncontrolled ventilation unconventional technique uncoursed rubble masonry uncured concrete under compression under inlet under load under tension under-reamed pile under-reaming cutter under-running bridge crane under-running stacker crane under-slung crane underbed underbridge clearance undercarriage undercoat undercroft undercuring undercut undercutter undercutting undercutting principle underditch underdrain underdrainage underdrainage bed underflooding underfloor conduit system underfloor duct underfloor heating underfloor heating cable underfloor raceway underflow undergo underground underground car park underground disposal underground drainage underground electric line underground garaging underground gas storage underground hydro-pumped storage facility underground hydroelectric power station underground ice underground laying underground main underground map underground oil storage underground pipeline underground powerhouse underground services underground structure underground survey underground survey network underground tank underground water storage underground work underground workings underhung crab underhung crane underhung trolley underlay underlayment undermining underpass underpinning underpinning pier underpinning pile underpinning pit underpinning structure underream underreaming undersanded concrete undersanding underscouring undersea tunnel

undershoot area underside underside of basement floor underside of foundation undersize diameter undersluice underslung running understressing undervibration underwashing underwater blasting underwater cement underwater concrete underwater concreting underwater concreting box underwater driving hammer underwater dry welding habitat underwater excavation underwater gradient underwater penetrometer rig underwater pile driver underwater pipeline underwater platform concreting underwater rockfill underwater structure underwater trench underwater trenchwork underwater tube underwater work underwindow air-conditioner undeveloped area undisturbed sample undisturbed soil undoweled joint undrained test undressed timber undressing room undular hydraulic jump undulating surface unequal angle unequal duo-pitched roof unequal tee uneven ground unfired brick unfit dwelling unframed door unfrozen pocket unfrozen thaw bulb ungauged lime plaster ungauged stream ungeared traveling and traversing crane unglazed tile unguarded crossing unhitch unhooking sling uniaxial deformation uniaxial loads uniaxial state of stress unified design unified soil classification unified structure uniflow uniflow spray nozzle uniform acceleration uniform body uniform building code uniform compression uniform concrete uniform ellipticity condition uniform elongation uniform flow uniform gradation uniform grading uniform load uniform load on a beam overhang uniform load over part of the span uniform load over the full length of a beam with overhangs uniform load over the full length of a cantilever uniform load over the full span uniform motion uniform sizes uniform story height uniform stream uniformly distributed load uniformly graded soil uniformly loaded beam unify unilateral elastomeric pot bearing unilevel terminal uninhabitable attic uninhabited region uninterrupted space union union bend union flange Union pile union tee union vent unique constructional problems uniqueness uniqueness of solution uniqueness theorem unison control unit unit air heater unit air-conditioner unit area discharge unit block unit cohesion unit construction unit cooler unit cost unit displacement unit flow unit force unit generalized load unit graph unit heater unit hydrograph unit hydrograph calculation unit labor in man-hours unit load unit moment unit pressure unit prices of materials unit seepage force unit storm unit strain unit stress unit stress produced by design loads unit vector unit water content unit-built block unit-built building unitary air-conditioner unitize unitized bathroom and lavatory block unit unitized bathroom block unitized kitchen unit unitized unit universal burner universal motor universal plane universal scraper university university building university town university zone unjointed beam unknown quantity unless otherwise specified unloaded chord unloaded span unloading unloading operations unloading ramp unloading works unlocking unlocking of joints unmanned level crossing unmolding unox process unparalleled planes

unpaved aerodrome unpaved road unpigmented styrene acrylate latex coating unplasticised PVC unprotected metal construction unpumpable concrete mix unreachable area unrefined raw materials unregulated stream unreinforced concrete unrelieved stress unrestrained member unrolled wire mesh unsafe unsafe structural member unsafe structure unsanitary zone unscaffolded side of the wall unsealed joint unseasoned wood unserviceable building unsightly architectural form unsightly deflection unsightly external appearance unsightly graffiti unsound plaster unsound wood unstable environment unstable equilibrium unstable failure unstable soil unstable stability unstable state unstable structural member unsteady filtration unsteady flow unstiffened edge slab unstiffened member unstressed unsupported height unsupported length unsurfaced exposed concrete unsymmetrical footing unsymmetrical load untensioned reinforcement untreated water unusable land unusual structure unvented system unwrought timber up stairs up-and-down movement up-feed heating system up-lighting up-slope direction upblast discharge upfreezing upgrade upgrading uplift uplift force uplift pile upper bound for ultimate load upper chord upper chord panel point upper cornice of the facade upper deck upper development upper flammable limit upper floors upper gate upper limit for load-carrying capacity upper load block upper pool upper yield point upperworks upright upright course upstairs upstand upstand beam upstand beam slab upstanding beam slab upstream upstream apron upstream cofferdam upstream control upstream engineering upstream face upstream floor upstream guide vanes upstream level upstream nosing upstream reach upstream slope upstream tapping upstream-deck slab upturn upward force upward travel of hook upward ventilation upward-acting force upwarping urban urban area urban conglomeration urban development urban element urban fabric urban planning urban pollution urban region urban renewal urban replotting urban skeleton urban sprawl urban structure urban tunnel urban tunneling urban unit urban waste urban zone urban-type village urbanization urbanized region urethane foam urethane foam insulation urinal usable apartment space usable attic usable floor area usable office space usable storage usage factor use use district use in practice used oil used water useful capacity useful cooling load useful heat uses of cement utilidor utilities utility and drinking water supply utility core utility costs utility detection system utility gallery utility gas utility line utility piping utility room utility shaft utility structures utility tractor utility window utilization utilization factor utilization time UV water treatment