activity

stone

equipment

people

wet

frame

Men

pouring

messy

gray

flowing

building

construction

industry

structure

working

support

occupation

job

stability

strength

cement

material

foundation

built

rock

floor

mixing

engineering

site

uniform

concrete

pipe

worker

installing

loading

issues

contractor

of

rod

the

spreading

employment

shovel

gravel

to

crew

forms

trowel

supporting