Concrete wall, close-up

Glass wool, close-up, fool frame

Cinder block wall with fresh cement

Construction site, high angle view

Steel building materials, close-up

Construction site, low angle view

Construction site

Construction site

Metal rods, full frame

Construction site

Building under construction

Perforated metal sheets

Wood, close-up

Bricks set on top of sack of gravel

"Stack of plywood, side view"

Non-slip galvanized sheet metal

Metal piping stacked against wall

"Construction site, bricks in wheelbarrow, stack of buckets in unfinished room"

"Pile of wooden planks, close-up"

Sheet of zinc, close-up

Smoke stacks on top of apartment building

Construction worker working at construction site

Construction worker placing wood in corner

"Construction worker pausing work, hand on forehead"

Two bricks

An illustration of power plants to indicate progress

Factories in the mountains with barcode smoke chimneys

Collage of a sun, students in caps and gowns with one in wheelchair, stack of books and a building

An illustration of laborers at work

Hands holding a building with a smoke stack on it

A small house creating a large stack of smoke

Montage of a building, a sun, a student in graduation gown pushing another in a wheelchair, and a stack of books

Metallic architecture under the sky

A man working at a warehouse

A man and woman balancing work and life

Businessman holding a key in front of a keyhole on a factory building

Stacks of building materials