- ascend
- ascending brace
- ascending diagonal
- aseptic block
- asexual
- ash percentage
- ashlar facing
- askew arch
- asphalt cement
- asphalt concrete
- asphalt distributor
- asphalt grouting
- asphalt kettle
- asphalt mixture
- asphalt paint
- asphalt work
- asphaltic
- assembling
- assembling fitter
- assembly building
- assembly element
- assembly shop
- assembly table
- assign
- assize
- associated professor
- assumed load
- assumption
- artificial illumination
- artificial lighting
- artificial massif
- artistic designing
- asbestine
- asbestos board
- asbestos cord
- asbestos millboard
- asbestos paper
- asbestos textile
- asbetile
- asequent landside
- ash
- ash concrete
- ashlar arch
- ashlar masonry
- ashlar wall
- askew bridge
- aspen
- asphalt
- asphalt block
- asphalt cutback
- asphalt grout
- asphalt membrane
- asphalt mortar
- asphalt tile
- asphalt-asbestos
- asphaltic concrete
- asphaltic macadam
- asphalting
- assassinate
- assault
- assemble
- assembling work
- assembly area
- assembly line
- assembly stand
- assembly unit
- assignment
- assignment statement
- assist
- association branch
- assumed period
- astragal
- astringent
- athletic field
- atlantes
- atlas
- atmospheric action
- atmospheric load
- atmospheric pressure
- atomic
- atomizer
- atomizing nozzle
- atop
- attach text
- aqueous soil
- aquiferous stratum
- arable
- arbitrary
- arc discharge
- arc light
- arch axis
- arch center
- arch diaphragm
- arch frame
- arch rib
- arch structures
- archaeological zone
- arched construction
- arched falsework
- arched structure