construction workers on the job site.

engineer industry construction worker industrial helmet safety professional site building engineering architect project architecture builder people job occupation contractor business team man equipment development hardhat teamwork technology inspection maintenance background plan workplace manager employee urban technician manufacturing happy working foreman management environmental engineerings property work construction workers building site labor crew industry hardhat tools materials work workforce trades manual machinery project skilled laborers scaffold excavator constructionwork team structure development foundation tradesmen heavy constructionjob equipment architecture concrete sitework