assembly
bar
bolts
build
building
clamp
clamped
clamps
close
connected
connector
construction
device
engineering
equipment
fasten
frame
framework
grey
grip
heavy
hold
industrial
industry
iron
job
joined
link
metal
pipe
poles
rods
safety
scaffold
scaffolder
scaffolding
screw
site
steel
strength
strong
tight
tightened
tool
up
work