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Steel beams
Portrait African engineer man use clipboard and Hispanic latin engineer woman use tablet computer checking precast cement at precast cement outdoor factory
A female worker uses an instrument to test steel pipes
New building under construlction.
Male Metal Worker Looking At Blueprint In An Industrial Factory
Milan, Italy - January 17, 2016 - Concrete casting on Reinforcing Bar of floor in industrial Construction site
Male engineer on the roof of a chemical factory building in Fujian province, China
Iron joints frame
Civil engineer and Architect inspecting metal building framing.
Grandstand steel structure hinges and fixed pin connection joint detail.
Portrait African engineer man use tablet computer and Hispanic latin engineer woman use clipboard checking precast cement at precast cement outdoor factory
Two blurred construction workers on construction site.
Construction workers are working on pouring concrete on a bridge project
An Hispanic steel worker working high up on a girder. He is standing on the girder with wearing a welding helmet, working on attaching a roof joist to the girder.
Construction steel rebar at building site.
Construction workers.
Construction site worker installing roof of new house, Large housing estate structure industrial concept
A female engineer uses an instrument to test circular steel pipes
This is the steel structure of a launcher gantry that will be used for erection precast concrete I Girder. One of method for erection girder in construction project.
Closeup large complicated bridge steel structure, Sydney Harbour Bridge, background with copy space, full frame horizontal composition
Tromso, Norway - August 3th, 2018:  Top view of a builder worker working on a concrete construction under the bridge of Tromso, Norway
Two engineers working at a metal fabrication factory inspecting steel truss towers. The workers are mature women in their 40s wearing hardhats and reflective clothing. The one on the right is African-American, and her coworker, holding a digital tablet, is multiracial.
The engineer in the bucket of the crane vehicle for checking the metal frame of the sky walks under the railway station in the urban, front view with the copy space.
Skilled repairman working in industrial workshop for PVC windows manufacturing
Female building contractor inspecting metal building framing site.
Construction worker in Hong Kong
Workers use steel lacing wire to attach steel bars to reinforcing bars. Close-up. Reinforced concrete structures - knitting a metal reinforcing cage
back view civil engineer hold the helmet inspection worker job in construction site
A male worker checks the quality of steel pipes on the construction site
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