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structural steel erection, bolt, weld, fall protection, ironworker, construction, cranes, structural, tower crane, erection crane, tie off, lanyard, body harness, safety line, man lift, connectors, mobile, boom, wide flange, angle, column, girder, plate, camber, spud, wrench, turn, nut, truss, gusset, chord, Manitowoc, Grove, Link-Belt, rough, terrain, hook, JLG, coon, pipe, arc, shop, field, drawing, bridge, frame, hot, rolled, section
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Structural ironworker lights acetylene torch from common butane lighter to enlarge bolt hole so upper column section can be bolted to splice plate. Torch is fed acetylene and oxygen through hoses from acetylene and oxygen compressed gas tanks. Ashley Terrace, Ann Arbor, Michigan April, 2007.
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Structural ironworker lights acetylene torch from common butane lighter to enlarge bolt hole so upper column section can be bolted to splice plate. Torch is fed acetylene and oxygen through hoses from acetylene and oxygen compressed gas tanks. Ashley Terrace, Ann Arbor, Michigan April, 2007.

ConstructionstructuralsteelerectironworkercolumnbuildingspliceplateacetyleneoxygentorchboltAshley TerraceAnn ArborMichiganApril2007structuresteel erection 9302

  • Structural ironworker on scissor lift uses short range radio to guide crane operator as the crane supports wide flange column section to be spliced on top of prevously erected column section. Ironworker is speaking into microphone of his chest mounted radio. Hisleft arm rests on the two splice plates of the connection between the two column sections. Ashley Terrace, AnnArbor, Michigan, 2007
  • Manitowoc crawler mounted lattice boom crane with luffing jib lifts structural steel wide flange column section to extend column where structural ironworkers are waiting on a scissor lift. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Structural ironworkers on scissor lift guide crane supported structural steel wide flange column section into position to splice it to top of column below. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Structural ironworkers on JLG 2032E2 20 ft scissor lift guide crane supported structural steel wide flange column section into position to splice it to top of column below. Ashley Terrace, AnnArbor, Michigan, 2007
  • Structural ironworkers on scissor lift guide crane supported structural steel wide flange column section into position to splice it to top of column below. Ashley Terrace, AnnArbor, Michigan, 2007
  • As crane cable supports structural steel wide flange column section, structural ironworker inserts tapered end of spud wrench into bolt holes in lower end of suspended column sectiona and splice plate bolted to top of previously erected column section to hold, support the column section in position to splice it to top of column below. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • As crane cable supports structural steel wide flange column section, structural ironworker inserts tapered end of bull pin into bolt holes in lower end of suspended column section and splice plate bolted to top of previously erected column section to hold, support the column section in position to splice it to top of column below.This adds to the support already provided by two inserted spud wrenches. The steel cable on lower column section is part of tensioned cable temporary diagonal bracing that supports the steel frame against lateral/ side loads until all connections have been completed. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Two structural ironworkers, one on scissor lift and one sitting on and tied to steel beam, inspect and discuss splice connection between two wide flange structural steel column sections. Upper, unattached column section is supported by crane cable at its top and held in alignment by bull pins and a bolt to lower column splice plates. Subsequent actions indicate the bolt holes for the second down left side of plate bolt (where left bull pin is inserted) do not line up, and ironworkers decide to increase size of hole in upper column section. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Structural ironworker holds acetylene torch fthat he will use to enlarge bolt hole so upper column section can be bolted to splice plate. Torch is fed acetylene and oxygen through hoses from acetylene and oxygen compressed gas tanks. This photo shows the hoses and the valves that feed the torch. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Structural ironworker lights acetylene torch from common butane lighter to enlarge bolt hole so upper column section can be bolted to splice plate. Torch is fed acetylene and oxygen through hoses from acetylene and oxygen compressed gas tanks. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Structural ironworker uses heat from acetylene torch to melt steel at bolt hole to enlarge bolt hole so upper column section can be bolted to splice plate. Torch is fed acetylene and oxygen through hoses from acetylene and oxygen compressed gas tanks. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Structural ironworker uses heat from acetylene torch to melt and cut temporary steel bolt to remove it and replace it with another bolt, following enlarging lower bolt hole so upper column section can be bolted to splice plate. Torch is fed acetylene and oxygen through hoses from acetylene and oxygen compressed gas tanks. Photo shows the gas control lever in the left hand of the ironworker. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Structural ironworker uses wrench end of spud wrench to tighten nut on bolt of splice plate to lower column section, following installing bolt in bolt hole that was recently enlarged between splice plate and upper column section. Ashley Terrace, Ann Arbor, Michigan April, 2007.
  • Steel/bridge/suspension/cable construction: Single bridge tower, with suspension cables, of the Palais de Justice pedestrian suspension bridge over the Saone River. Lyon, France September 2006
  • Steel/bridge/suspension/cable construction: Connections of steel wire cables to the single bridge tower of the Palais de Justice pedestrian suspension bridge over the Saone River. Lyon, France September 2006
  • Steel/bridge/suspension/cable construction: Anchorage for steel wire cables of Palais de Justice pedestrian suspension bridge over the Saone River. Each suspension cable is anchored by four long threaded bolts embedded in concrete, inside a drilled hole in a large stone. Lyon, France September 2006
  • Steel/bridge/suspension/cable construction: Anchorage for steel wire cables of Palais de Justice pedestrian suspension bridge over the Saone River. Each suspension cable is anchored by four long threaded bolts embedded in concrete, inside a drilled hole in a large stone. Lyon, France September 2006
  • Steel construction/erection: Grove wheel mounted self-propelled hydraulic telescoping boom mobile crane lifts two wide flange structural steel sections to be placed by two ironworkers. The lower steel section is ~8 ft long is to be erected first and the upper is ~30 ft long second. The ironworkers are in position, each with a foot to either side of an erected wide flange section, one standing with arms raised to signal the crane operator and to grab and guide the lower section into position. Note the wires carrying electricity, on right side of site far below the end of boom. Any contact between crane boom and a high voltage wire such as here, creates an extreme hazard that kills many ironworkers annually. Depot Street, February 2006.
  • Steel construction/erection: Crane supports center of steel girder as two erection ironworkers erect structural steel using temporary bolts. Ironworker on right is sitting on end of girder/beam, using the pointed end of his spud wrench to pry end of beam into position to connect punched holes in girder and column. Ironworker on left has just cooned out (walked out with feet on lower flange on either side of girder) to near center of girder, at which point he will release girder from cable sling after his partner on right has secured support of girder by the column. The far end of girder is supported by temporary bolt(s) connecting girder to column. After structural steel frame has been erected with temporary bolts, the entire frame will be plumbed up, section by section, and permanent bolts will be installed. Depot Street, Ann Arbor, Michigan, February 2006.
  • Steel construction/erection: Ironworker standing on girder near photo bottom tosses erection bolts to ironworker straddling girder above, for him to use in erecting beam(s) on opposite side of girder. Two bolts sit on top of girder flange, and third is mid air (see arrow to it from circled, slightly enlarged guide), with ironworkers hands waiting to grasp it. Ironworker standing on lower girder has no fall protection, and he is tossing bolts with the hand he would use to hold on to column. Depot Street, Ann Arbor, Michigan on a cold, windy day in February 2006.
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