anchor
anchorage
architecture
assembling
base
bolt
build
built
cement
color image
column
concrete
construct
construction
detail
engineering
equipment
factory
fastener
fastening
foundation
ground
horizontal
image
industrial
industry
iron
material
metal
no people
nut
photo
pillar
plant
rebar
reinforced
reinforcement
rod
rough
screw
site
steel
structural
structure
support
technology
thread
tool
us
work