Structural steel, 1971; workers assembling a steel structure
![Structural steel, 1971; worker shaping wiring on a steel structure [1 of 2]](/uploads/r/null/8/a/b/8ab6651e0cfea2558fae086ec28f4b3a211f32a4081d0e8c7d9f2308a57269a3/a004844_142.jpg)
Structural steel, 1971; worker shaping wiring on a steel structure [1 of 2]
Structural steel, 1971; man cutting wires on a steel grid
Structural steel, 1971; a worker sitting on the top beam of a structure tightening bolts on a beam
Structural steel, 1971; man walking along a beam at the top of a steel structure
![Structural steel, 1971; men working on a steel structure [2 of 3]](/uploads/r/null/c/3/e/c3e21d00fdd3287467f09697c36f3ac1831a384f1380ccdcc2bd9b8e08bb7067/a004872_142.jpg)
Structural steel, 1971; men working on a steel structure [2 of 3]
![Structural steel, 1971; men working on a steel structure [3 of 3]](/uploads/r/null/4/7/8/478f0f7fba96fae17c002b3506b27b1e18fb22867b5f9bcc4687fb9196bea63a/a004873_142.jpg)
Structural steel, 1971; men working on a steel structure [3 of 3]
![Structural steel, 1971; worker welding [2 of 2]](/uploads/r/null/b/0/e/b0e50425ea4e0be66431c12c1a94200531c31e8dcd52d617fb7fda26129ea0da/a004848_142.jpg)
Structural steel, 1971; worker welding [2 of 2]
Structural steel, 1971; two students assembling scaffolding
Structural steel, 1971; two students assembling scaffolding; other students working below
Structural steel, 1971; two workers assembling scaffolding; other steel structures in surrounding area
Structural steel, 1971; two men standing at the top of scaffolding holding onto a tall pole; people working below
Structural steel, 1971; two men standing at the top of scaffolding holding onto a tall pole
Structural steel, 1971; two men standing at the top of scaffolding attaching cabling to a pole [2 of 2]
Structural steel, 1971; worker standing on a side beam guiding a large piece of steel; another worker watching
Structural steel, 1971; two workers standing on a side beam guiding a large piece of steel
![Structural steel, 1971; workers standing at the top of a steel structure [1 of 2]](/uploads/r/null/5/e/3/5e3046332cda590505ada2128053031f8b9119a67955f7e8045cca78f27c25e8/a004865_142.jpg)
Structural steel, 1971; workers standing at the top of a steel structure [1 of 2]
Structural steel, 1971; worker standing at the top of a steel structure; steel beam being moved using a crane
Structural steel, 1971; worker welding part of a steel structure
Structural steel, 1971; man shaping a piece of steel cable
Structural steel, 1971; two men standing at the top of scaffolding attaching cabling to a pole [1 of 2]
Structural steel, 1971; worker holding onto the side of a tall steel beam
Structural steel, 1971; worker standing at the top of a steel structure
![Structural steel, 1971; worker shaping wiring on a steel structure [2 of 2]](/uploads/r/null/c/c/1/cc19476ad00cb67ed3083ae1289fc01540d63a1baed31035b57c6d25e9fe3ac7/a004845_142.jpg)
Structural steel, 1971; worker shaping wiring on a steel structure [2 of 2]
![Structural steel, 1971; worker welding [1 of 2]](/uploads/r/null/b/2/1/b2198e46ec7719c5dfdc25704926bcaa6b1e7369f33dea9f998c387d738cb0ad/a004847_142.jpg)
Structural steel, 1971; worker welding [1 of 2]
