Factory workers at a machine shop

3000 × 2376

Bridge under construction

1700 × 1366

Medieval construction site

2433 × 1578

Construction crane over city

1000 × 1000

Stormy port with crane

1600 × 1200

Minnesota Point from Incline Railway

4000 × 3135

Car assembly in early 1900s factory

1920 × 1200

Men in factory with large machine

3030 × 3870

Construction site with crane

1492 × 1996

Workers on steel beam

1478 × 1129

Workers at a port construction site

1000 × 661

Construction of a steel-framed building

2232 × 1690

Construction site with steel framework

2220 × 1675

Shipyard construction scene

2272 × 1704

Workers on a suspension bridge

1920 × 1200

Large crane against blue sky

1620 × 1080

Industrial crane at a port

2600 × 2021

Construction site with cranes

950 × 757

Factory workers in warehouse

2300 × 1830

Factory workers at their stations

2200 × 1723