oak 
oakum ;   hemp ~   white ~    
obelisk 
object 1.  2.  bulky ~s   long ~s   (,   w. .) movable ~   ()
observation 1.  (  ,    .,) 2.   <> ~ on the work     3. .  ~s of structures under service conditions        reciprocal ~  ,   reciprocal vertical-angle ~        
observatory 1.  2.  
obsolescence  ;   ()
obstacle  natural ~s  
obstruct <> to ~ the operators view   [ ] ,    
occupancy       ,  assembly ~   (, ) beneficial ~      partial ~          ()
occupants  (, ),  ()
ocher  red ~   () yellow ~   () 
ocrating   - (      )
octahedron , 
odograph 
odo(u)r 
oedometer , ,   autographic ~    
office  ;  ,  baggage registration ~    design ~   drawing ~   field ~  ( )   government ~   mobile field [mobile site] ~    ( ) post ~   printing ~ 
officer ;   area planning ~     contracting ~ ;      planning ~ ,  -  safety ~     ( )
off-limits   (     )
off-ramp  (     )
offset 1. ,  2.   3. ,  (. ), ,   () 4.   (   ) 5.  () 6.   (.   ) 7.  8.      9. ,  ,  (       ) 10.  ,  ( ),   fly-jib ~   (   ) pass-over ~  ,   () return ~  ,   () 
off-shore ,  (   ) 
off-size    ()  ||   []  
off-stage   [] 
offtake 
offtracking  ()     ( )
off-white     
ogee 1. ,   S-  2.  ,       , S-  3.     
ogive 1.   2.     
oil 1. ;  ,  2. ;  banana ~ ,   (    ) bodied linseed ~   boiled linseed ~   bone ~   coal tar ~   creosote ~   crude ~ ()  flux ~   form (work) ~   fuel ~  ,   heat transfer ~   ( ) linseed ~ ;   mineral ~ 1.   2. ;  mold ~   paint ~  raw linseed ~   residual ~   road ~   rosin ~  []  silicone ~  ; -  tar ~ ; ;   thick ~   thin ~   transformer ~   tung ~   (   ) used [waste] ~   working ~   ( )    oil-canning .     (),     ()
oiler 1. ;  2.  
olf          ( ) 
one-way    
opacity 1. ,   () 2. ; ;  
opener 1.  2.  automatic ~   (, ) fanlight ~  [  ] 
opening 1. , ; ; ;  2.  () 3.  (, ) 4.  () 5.  (  ..) 6.  (   .) ~ of bids     access ~  []   beam ~ 1.  (   ..)    2.           booth front ~     [] bridge ~   bridge waterway ~   discharge ~  [, , , ] ;  ;  () door ~  ;       effective ~      exhaust ~   face ~ of exhaust hood     feed ~  []  flare ~   floor ~    (  ,  ) formal ~   (  ),   gate ~   hood inlet ~    ;     inlet ~  []  intake ~  [] ;  ;   jaw ~   ();   () observation ~  []   ( ) outlet ~   outside air ~   () spillway ~   suction ~   supply air ~   valve ~ 1.    2.    ventilation ~   window ~  
openwork   ( )
operated ;   ;   , 
operating ; ; ; 
operation 1. , , ;  2.  <> in ~   ;    automatic ~   building ~   ,  ; 1   calculation [calculating] ~  []  concreting ~s   continuous ~ - ;    earthwork ~s   field ~s ,    finishing ~s  ,   full load ~  ()    1  ] fully automatic ~     gate ~    hand ~   hazardous construction ~s    [] (     ) intermittent ~   jacking ~  [],     ( ,     ..) loading ~s  ,   manual ~   manufacturing ~s   ,   mechanical ~   meticulously planned construction ~s     [] no-load ~   planning ~   running-off ~  () slinging ~s  stressing ~s   - ();    ( ) survey ~s   synchronized jacking ~s  []   tensioning ~s    ( ) testing ~s   time-consuming ~   traffic ~   () unloading ~s  ,   vibrationless ~  (),    ,    working ~s under way   
operative 1.  2. 
operator ; ;  automatic (door) ~    boom ~  -  concrete pump ~  []  crane ~  drill ~ ;   electric ~    () elevator ~  gate ~ -  (- ) machine ~ ,  ,  mechanical ~     () shovel ~ 
optics ;  ;   fiber ~   X-ray ~  
option ;  ; ;  contractors ~    (  ,       ,    .     ) formwork ~   
opus reticulatum  (   )
order 1.   2.  3.  4. ,  5. ;  <> in good ~   [] ; in running ~  ;    ~ of erection   attic ~   (     ) change ~  ()    (  ) composite ~   Corinthian ~   Doric ~   field ~  (    )        field work ~  ( ,   )   ,         .) Greek Doric ~    Ionic ~   job ~  modification ~ . change order Roman Doric ~    rush ~   slow ~     Tuscun ~   work ~  []  (  )     
ordinance 1. , ,  2. ;    [] zoning ~  (. )      
ordinary , ; ,  ( )
ordinate  ~ of a point   middle ~ .  
ore  beneficated ~   crude ~  
organization  ~ of safety   ( ),     ~ of work   building site ~      first-aid ~     ( ) graded ~ ;   (.  - ) office ~    (   .) site ~ ,   ;      
orientation  ()',  ~ of a building  ()  ~ of windows    absolute ~   analytical ~  ()  inner ~   () interior ~   ()
orienting  ()
orifice 1.  2. ()   ( ) 3. ;  calibrated ~   delivery ~ '  discharge ~   metering ~   throttling ~   []
origin ; ;  ~ of coordinates   ~ of force    noise ~  
originate 1. ; ; ,   2. ,  ()
ornament ;   architectural ~   geometrical ~   sculptural ~  
orthophotomap 
oscillations  bending ~   constrained ~   continuous ~   damped ~   decaying ~   forced ~   free ~   harmonic ~   lateral ~   longitudinal ~   torsional ~   
osciloader   
osmosis  reverse ~  
ossature  (),   ()
outage 1.  (  ) 2. ,  (  ) 3. 
outbuilding  ;  [] 
outcrop     ,  
outfall 1.  ,  (, ),  2.   3.   ;  ;    ;   sewer ~   storm water ~  submarine ~      
outfit 1. ; ; ; ; ; ;  2. , , ,  ~ of tools  []  first-aid ~    radio ~    repair ~    testing ~    tool ~  []  welding ~  
outflow 1.  ;  2.  (1.  2.  )
outhouse 1.   2.  3. 
outlet 1.  ; , ,  2.   3. ;  ;   4,    5.   air ~  ;  bath ~   bottom water ~  ,   ceiling ~    dam ~  ,   drainage ~  ,   effluent discharge ~    emergency ~   exhaust ~  ,   filter ~   floor air ~    mud ~   nozzle ~  ;    pipe ~   river ~ 1.  ,   () 2.   () 3.   () roof ~   service water ~   sink ~   slotted ~  ;    socket ~  ,   spray ~   (  ) stream ~   supply air ~  ,  twist ~   vaned ~    wall ~    waste ~ 1. ,  2.   wastewater ~ 1.   () 2.      water ~ 1. ,  2.  ()
outline , , 
out-of-action   , 
out-of-adjustment ,  
out-of-alignment ; ; 
out-of -balance , 
out-of -center  ,  
out-of-circuit    
out-of commission   ,    
out-of-date  
out-of-focus    (  ) 
out-of-gear   ;    
out-of-joint  .     ( ), ,    
out-of-line ; ; 
out-of-operation ,    
out-of-order  
out-of-phase   ,   ,     
out-of-plumb  ,    
out-of-position    ,  [] 
out-of-repair  ; ;    
out-of-round (ness)     ||  (   ..)
out-of-service   ;   (  ) 
out-of-shape     ;    
out-of-size    ;     
out-of-square     
out-of-tolerance    ,     
out-of-true     ;         
out-of-use   ; 
out-of-work , 
outperform     ;     
outport ,  
output ; ; ; ; ; ;  ~ of 150 m /gang/day   []  150 air ~   cold rated ~  - (  ) daily ~   heat ~ ; -,   hot rated ~   (  ) rated heat ~  -;  
outreach  ( , ) horizontal ~ ()  ' maximum ~  ,   
outrigger   (, ) front ~s    power-set ~s    rear ~s   
outset ,   ()
outskirts 
outwash  
outwindow ,     ; 
outworn 
ovals   (    )
oven  coke ~   drying ~   enameling ~     gas (-burning) ~  
overall ; 
overbalance   
overbend   
overbreak        
overbridge 
overbuild 1.  2. ()  (,   ..)
overburden   ;  ; ,  
overcharge  || 
overcladding    (  ),      
overcloak      (   )
overcrowding  (, )
overcutting     ,    (   )
overdamming 
overdesign  []    []  
overdevelopment   
overdoor  []     
overdosage, overdosing ,  []  ;    [] 
overdraft     (, )
overdrive: pile ~        
overdriving        
overfall 1. ,   2.  clear ~  []  side ~   submerged ~   suction ~  
overflow  (    ),  ;  ;  bellmouth ~   storm sewage [storm water] ~  weir ~ 1.   ( )   2.  
overgrainer  (        ..)
overhang 1.    ( );    (. ) 2.   3.  ,  4.   , ,  ( ) entrance roof ~ ,  ,    ( ) overheating 
overlap 1. ;   2.  (), ;  3.  (  );  ( )
overlay 1.  []  (.  ),   ( ) 2.     polymer concrete ~    
overload  ;  || 
overloader   
overloading  ,  ~ of building components     deliberate ~    (      ) inadvertent ~  
overman ; 
overpass    ;    ;  pedestrian ~  
overpeopling 
overpressure   ||    space air ~   ( , )
override 1.  2.   ,    , 
overrun 1.    ;    (.   ) cost ~  ( )
oversail 1.  []   (. ) 2.     3. ,  (  )
oversanding   []  (.   )
oversize  ;   ;  
oversoil     
overstress ,   || 
overstressing 1. ,  ;     2.   ( )
overstretching   ( )
overtaking  ()
overtension   ( )
overtile  
overtime  
overturn  || 
overvibration    ( )
overview of the state of the art   
ovolo   ( )
owner 1. ;  2.  ~ of project  building - ; 
oxidability  water ~  
oxidation  sewage ~     wet ~   (  ),  
oxide  aluminum ~  ,  antimony ~   ( ) calcium ~   red iron ~   ()
oxygen 
oxygenator   
oxysulfate  magnesium ~   
oxytank  (     ) 
ozocerite, ozokerite ,  
ozonation  
ozone  
ozonizer  