ultrafiltration 
umbra  () burnt ~   raw ~  
unbalance ;  
unbolt ,  [] 
unboundness of the domain  [] 
uncenter 
underbed   (  )
undercarriage  ,  ,   (, ) crawler track ~    walking ~   ,    wheel ~   ,   
undercoat 1.    (  ) 2.  , 
undercroft   , 
undercuring   (),   (,  )
undercut 1. ;  2.  (. )
undercutter: chain-type ~     
undercutting 1. ;  2. ,  ()
underditch  ;  
underdrain 1.  ,  [] ,     ||    2.      filter ~   
underdrainage  ,  
underflooding 
underflow 1.   2.     [ ]
undergo  (. )
underground 1. ;   2.  () 3. ()  4.  ;  storage ~   working space ~  ()
underlay 1.      2.   ( )
underlayment  (),  ,  (    .) free-flowing ~  [ ]  (  ),      [] pourable [self-leveling] ~  () ;   ;   (  )
undermining ,  ()
underpass   city ~    street ~   ;  
underpinning  ;    maintenance ~    (   ) pile ~    pit ~     ,    (  ) precautionary ~        pretest ~         ( )
underream   ( )
underreaming     (.   )
undersanding    (.   )
underscouring  (. )
underside    ;  ~ of basement floor    ~ of foundation  
undersluice  ;   
understressing    , 
undervibration   []    ,    
underwashing , 
unhitch  (, )
uniflow 
unify 1. , ;  2. 
union 1.    ,  2. ,  detachable ~     flange ~   four-way ~  pipe ~    ,  
uniqueness ;  ( ) ~ of solution   
unit 1.  || ;  2.   3. ,  4.  ; ; ;  (), ;  ( ) ~ of area 1.   2.  ;   ~ of length 1.   2.  ;   accommodation ~  ;  ;     activated sludge ~  aerated concrete floor ~      aerator-clarifier ~ - air conditioning ~  () air cooling ~ -  air curtain ~    air handling ~     ;   air mixing ~  air-operated grease ~    air supply ~ (-)   air-to-air heat recovery ~    - aluminum deck ~    audible alarm ~   basement dwelling ~    boiler ~  bridge ~    () British thermal ~   , ... (1,055 ) building ~    cladding ~   compound ~s      (.    ,    .) compressor ~   concrete building ~    concrete core ~     concrete injection ~ -- condensing ~ --  cooling ~  [] ;  cooling and heating ~  -  crawler power ~ 1.       2. - decentralized air heating ~    disposal ~   diversion ~   door ~ 1.   2.           door and frame packaged ~   drainage fixture ~       (  ) drying ~   dwelling ~  ; ;   factory precast ~      fan ~   fan-assisted warm air ~     fan coil ~   [] filter ~   fixture ~ . drainage fixture unit floor (building) ~    [] folding bed ~       four-wheeled power ~   free delivery-type (air conditioning) ~      gas control ~   girder-deck ~ () - glass (building) ~  ()    heating ~   heat reclaim [heat recovery) ~ -,  high pressure terminal ~    indirect fan-assisted warm air heating ~            induction ~   industrially produced modular ~   []  insulating glass ~  intensive cure ^  interlocking concrete ~s       inverted U-shaped concrete ~    -  kitchen building block ~   [] - latch ~  ;   ( ) living ~   low pressure induction ~  ,     masonry ~  ( )  mass-produced structural ~s     modular ~   () modular masonry ~       (, , ) molded concrete ~  ()   multicast gang ~   (    ) multizone ~     neighborhood ~ nonconforming ~    (),     packaged ~  (  ,              ) parallel wire ~      (  ) passenger car ~    (   ) plumbing ~ -  post-tension ~    (    ) power ~  ,  ;  ;   precast ~     ;     precast prestressed concrete ~      prefab (ricated) ~   () prefabricated bathroom ~   []   pressurization ~ ;       pump ~   refrigerating ~   reheat ~ -,   reheat induction ~       residential ~   roof extract ~    roof top ~ ,     room ~   []    sealed condensing ~  -  sealed double glazed ~  secondary ~   self-contained cooling ~   single duct ~   sink ~    solid masonry ~      solids-control ~      stabilizing ~ attached to loader         standby ~   steel plate ~    ,      straightening ~   structural ~   () supply fixture ~           (       ) terminal ~ ,    three-bedroom (ed) dwelling ~     tile trim ~s   ;    turbidity ~    two-wheeled power ~  ()  unitized ~  [] ;   unitized bathroom and lavatory block ~  []    unitized kitchen ~  [] - urban ~      warm air heating ~    waste-disposal ~ 1.  2.   ,    water correction ~ ,    (.      ) water meter ~   WC-and-bathroom ~    window ~   window and frame packaged ~   zone terminal ~  
unitize     [] ;  (.   )
university  ( )
unloading  ; ^ pressure ~  
unlocking of joints   (),     () 
unmolding ,   
unsafe ;    
unstressed 
upfreezing ;  ()
upgrade 
upgrading , 
uplift 1.     2. ;  ;  []  3.  ,   ;    hydraulic ~  
up-lighting    (, )
upperworks   
upright 1.    2. ;   
upstairs      []
upstand      (.  ,     )
upstream 1.   () 2.   
upturn . upstand
upwarping ,  ()
urban 
urbanization 
urinal  bowl ~  stall ~   wall ~  
use ,  <> ~ in practice   ~s of cement    architectural ~  ,      [ ] constructional ~s     consumptive water ~   intended ~   (, , ) land ~ 1.    2.  ,  new ~s    (. ),    (. ) practical ~   recirculating water ~     repair ~  []  ()  safe ~   specific land ~    () structural ~ 1.     2.          water ~ ; 
utilidor   (,         )
utilities 1.   2.   ,   3.   4.   5,    public ~ 1.     ,     2.   water ~  
utilization ,  constructional ~  []    heat ~   industrial ~   