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My Construction Photos > 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

My Construction Photos > 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.

My Construction Photos > 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.

My Construction Photos > 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

My Construction Photos > 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.

My Construction Photos > 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.

My Construction Photos > 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.

My Construction Photos > 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.

My Construction Photos > 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.

My Construction Photos > 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.

My Construction Photos > 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.

My Construction Photos > 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.

My Construction Photos > 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

My Construction Photos > 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

My Construction Photos > 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

My Construction Photos > 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.

My Construction Photos > 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.

My Construction Photos > 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.

My Construction Photos > Structural steel construction. Structural steel ironworkers weld rigid/moment connections on adjacent girders to support fifth floor of five floor building. Each is straddling girder. Two were raised into position by JLB hydraulic boom manlifts. The worker on left climbed ladder to get into position. A worker is walking top of girder in center of photo bringing tools/supplies to welder. None of the workers, or others on this project were wearing personal fall protection. Liberty Lofts, Ann Arbor, Michigan, February 2006

My Construction Photos > Steel construction: Structural ironworkers work at several stations erecting and connecting two giant, steel trusses elevated 40+ feet above current floor elevation. All the ironworkers have fall protection from railings on elevated work platforms or from body harnesses and safety lanyards tied off to steel. UCLA, Los Angeles, CA, 2004.

My Construction Photos > Steel construction: Three man structural ironworker crew unhooks large, high steel truss from crane. All are wearing fall protection: body harness with safety lanyard attached by sliding clip to top flange of truss. UCLA, Los Angeles, CA, 2004.

My Construction Photos > Steel construction: Two leather clad structural ironworkers perform torch work on massive steel connection of large steel truss. Each is working off of a rope supported plywood temporary work platform about 50 ft in the air. Each ironworker has fall protection from body harness, safety lanyard, and tie off to top chord of steel truss independent of the work platform. Ironworkers working at height on a small temporary platform in the dark behind welding masks are in an extremely vulnerable situation that requires secure fall protection. UCLA, Los Angeles, CA, 2004.

My Construction Photos > Steel construction: Two structural ironworkers perform torch work on massive steel connection of large steel truss. They are working from the elevated platform of a scissor lift whose guardrails provide excellent fall protection. Note that the yellow steel at mid-right is part of the temporary support structure for the truss and not part of the permanent structural system. UCLA, Los Angeles, CA, 2004.

My Construction Photos > Structural steel construction: Link-Belt wheel mounted RTC rough terrain crane erects steel in construction of YMCA, Ann Arbor, 2004

My Construction Photos > Structural steel construction: Ironworker groundman loops sling around complex fabricated structural steel section, hooks sling to erection crane line hook, and helps guide beam as it is raised for structural steel frame in construction of YMCA, Ann Arbor, 2004

My Construction Photos > Structural steel construction: Boom of Link-Belt crane lifts and swings wide flange steel beam to erect steelin construction of YMCA, Ann Arbor, 2004

My Construction Photos > Structural steel construction: Ironworkers receive and set wide flange beam in erecting structural steel in construction of YMCA, Ann Arbor, 2004

My Construction Photos > Structural steel construction: Ironworkers bolt wide flange beam in position in erecting structural steel in construction of YMCA, Ann Arbor, 2004

My Construction Photos > Structural steel construction: Steel erection nears competion. Link-Belt wheel mounted RTC rough terrain erection crane is in left background in construction of . YMCA, Ann Arbor, 2004

My Construction Photos > Structural steel construction: Two structural ironworker erectors place erection bolts for wide flange steel beam. Beam remains loosely attached to crane cable hook by sling, while ironworkers do erection bolting. Ironworkers are supported by JLG electric boom lifts that are controlled from worker platform. Ironworkers have personal fall protection from lanyards between body harness and lift guardrail. Biomedical Engineering, North Campus, University of Michigan, Ann Arbor, 2004.

My Construction Photos > Structural steel construction: Two structural ironworker erectors wait to receive next structural steel beam to erect. Workers are supported by JLG electric boom lifts that are controlled from worker platform. Terex truck mounted erection crane is in background, and we can see its truck bed and its driver side rear outrigger (red) extended to stabilize its base while lifting steel. Biomedical Engineering, North Campus, University of Michigan, Ann Arbor, 2004.

My Construction Photos > Structural steel construction: Structural steel ironworker leaves worker lift, climbs onto and straddles erected steel wide flange beam (girder), walks ("coons") lower flange, and guides crane supported wide flange beam into position to bolt in place. Ironworker's safety lanyard is not connected to any support while he moves on the steel. Once in position to receive the beam, he attaches a safety clamp onto top flange of beam, and he connects his safety lanyard (attached to his body harness) to the clamp for personal fall protection. (See inset detail in relevant photos.) Biomedical Engineering, North Campus, University of Michigan, Ann Arbor, 2004

My Construction Photos > Structural steel construction: Structural steel ironworker uses spud wrench (see inset detail). He first uses spud end to align bolt holes of girder connector plate and wide flange beam and then to temporarily support beam in proper alignment while he inserts bolt and twists on nut with his hand. He then tightens bolt with wrench end of spud wrench. Two bolts are installed before crane releases beam, and they provide interim support of beam until frame has been erected and plumbed and permanent bolts are installed. Biomedical Engineering Building, North Campus, University of Michigan, Ann Arbor, 2004.

My Construction Photos > Structural steel construction: Terex BT4700 telescopic boom truck mounted crane erecting structural steel. Biomedical Engineering, North Campus, University of Michigan, Ann Arbor, 2004.

My Construction Photos > Structural steel construction: Terex BT4700 telescopic boom truck mounted crane erecting structural steel. Outriggers (red) are extended to provide stability. Biomedical Engineering, North Campus, University of Michigan, Ann Arbor, 2004.

My Construction Photos > Piping construction: Caterpillar D5C XL crawler tractor with side mounted pipe layer boom and Deere 200C crawler mounted hydraulic backhoe support large bore steel underground steel pipe in trench with pipe slings. Workers are happy to help hold pipe in position. Dixboro Bridge, Ann Arbor, 2004

My Construction Photos > Construction welding: External pipe lineup clamp holds two large bore pipe sections in position for welding. Welder standing on right of pipe and welder on his back left of pipe (welding above his face) make initial electric arc weld stitching around pipe joint to hold joint in position for the first complete weld bead all around the joint (after lineup clamp has been removed). Dixboro Bridge, Ann Arbor, 2004

My Construction Photos > Construction welding: Electric arc welding all around of large bore underground steel pipe. One welder welds at left top. Lying down welder welds lower half. Pipe is supported by wood blocking/cribbing. Dixboro Bridge, Ann Arbor, 2004

My Construction Photos > Construction welding: Electric arc welding all around of large bore underground steel pipe. Worker grinds top weld while lying down welder welds lower half. Pipe is supported by wood blocking/cribbing. Dixboro Bridge, Ann Arbor, 2004

My Construction Photos > Construction welding: Lincoln electric arc welding machines mounted on custom beds of two trucks, provides portable construction electric field welding to the pipe welding crew in left center. Dixboro Bridge, Ann Arbor, 2004

My Construction Photos > Construction welding: Lincoln electric arc welding machine mounted on custom bed of truck, provides portable construction electric welding in the field. Dixboro Bridge, Ann Arbor, 2004

My Construction Photos > Structural steel erection: Manitowoc cable-rigged crawler-mounted open-lattice boom crane with gib, lifts corrugated steel decking into position. Hyundai Automotive Tech Center, Geddes & Leforge roads, just east of Ann Arbor, 2004.

My Construction Photos > Structural steel construction: Tower crane safely moves 2 structural ironworkers in personnel basket from top of structural steel frame to ground during steel erection. Cardiovascular Center, University of Michigan Hospital, Ann Arbor, 2004.

My Construction Photos > Steel construction: Two man structural ironworker crew installs bolts for the splice of one structural steel H-column section above another. Both men are wearing fall protection: body harness with safety lanyard attached to previously erected structural steel. Note the prepunched holes in column flanges for bolting steel beams and girders during erection of remainder of the steel structural frame. Cardiovascular Center, University of Michigan, Ann Arbor 2004.

My Construction Photos > Concrete and structural steel construction: Three cranes and a personnel lift operating in same area. On right, Grove mobile telescoping hydraulic crane lowers concrete bucket to place concrete. On left, another Grove mobile telescoping hydraulic crane is not currently operating, so it supports concrete masonry unit deadweight. In left center of photo, corrugated galvanized steel decking is being raised by unseen tower crane to be erected on steel frame to left. In center, Genie personnel lift supports an ironworker. Cardiovascular Center, University of Michigan Hospital, Ann Arbor, 2004.

My Construction Photos > Earthwork, steel, concrete construction: Basement area has WF steel soldier beam, timber breastboard, tie back temporary retaining wall in left center. Bundles of resteel sit at grade level behind retaining wall, and two horizontal cables provide excavation edge fall protection. Right center bottom to top cast-in-place (CIP) reinforced concrete foundation piers sitting on CIP spread footings below and support base plates for H-section columns for superstructure. Protruding from piers are rebars, in circular pattern in piers, and 4 anchor bolts for column base plates. The rebars will be cut off before base plates and columns are set. heavy copper wire also protrudes from top of piers that is also attached to an electric ground plate in soil at bottom of footing. The cable will be attached/ spliced to metal above to provide an electic ground for building. Resteel extends above CIP foundation wall at bottom and upper right to provide reinforcing continuity at joint with future wall above and CIP slab to right. Backfill at bottom of excavation is sand, and additional granular material at top rear will later provide vertical support for CIP slab. Pink polystyrene sheets stacked in excavation will provide insulation when attached to exterior of foundation/ basement wall, as at mid-height far right. Cardiovascular Center, University of Michigan Hospital, Ann Arbor, 2004.

My Construction Photos > Steel construction: Structural ironworker inserts bolt through bottom flange plate and bottom flange of beam with left hand and screws on nut from top with right hand. Bottom flange plate was earlier welded to the steel column to left in the fabrication shop. This is the last of 5 bolts on the near side, to which another 5 bolts will be added in the bolt holes shown in background. All bolts will later be torqued tight to transfer forces from beam to bottom plate by friction. Notice the edge of the washers underneath the nuts, to allow easy turning of the nuts with low friction. Computer Science and Engineering Building, University of Michigan, Ann Arbor, 2004.

My Construction Photos > Steel Construction: Steel wide flange beam and girder sections layed down on wood blocking in preparation for erection of structural steel building frame. White markings identify sections by project (2018), position in building (4th floor), and number on erection drawings (A416, A422). Ann Arbor, 2005.

My Construction Photos > Steel Construction: Bolted steel structural frame of steel wide flange columns, girders. Corrugated galvanized steel decking provides support for concrete slab floor. Ann Arbor, 2005.

My Construction Photos > Bridge construction, steel construction: Erecting prefabricated panels of a Mabey steel truss panel temporary bridge over the Merrimac River on Route 113. Ironworker on top of erected panels guides crane operator, facing toward us, while ground man guides panel into place. Panels are connected by single driven pin at bottom and bolted connection at top. Tyngsborough, MA 2005.

My Construction Photos > Bridge construction, steel construction: An International dozer and a Dressta dozer both push on the erection end of the Mabey Bridge that will temporarily carry Route 113 vehicle traffic to allow rehabilitatrion of the adjacent steel truss bridge over the Merrimack River. Additional prefab panels will then be erected to lengthen the bridge, which then can be pushed out further. Cycle continues until bridge reaches west shore of Merrimack. Tyngsborough, MA 2005.

My Construction Photos > Bridge construction, steel construction: Superintendent at upper right listens to radio with right ear while directing the dozer operators pushing the bridge with signals of his left hand. Ironworkers standing on top of each temporary bridge pier watch process and signal superintendent with hand signals/ radio if there is reason to stop. They also unlock and lock rollers to allow movement when dozers push and to prevent movement thereafter.Superintendent is standing on stack of temporary bridge deck panels, which will span transverse bridge joists to provide final driving surface. Tyngsborough, MA 2005.

My Construction Photos > Bridge construction, steel construction: Ironworker is taken by boat/skiff, driven by another ironworker, to temporary bridge pier. Both are wearing life jackets for water safety. Tyngsborough, MA 2005.

My Construction Photos > Bridge construction, steel construction: Ironworker is taken by boat to temporary bridge pier, climbs up wood pier protection, sets ladder, and climbs ladder and pier steel to top to observe and report on movement of bridge as it is pushed out over river. Ironworker will release locks on rollers so bridge can be pushed, and after bridge push is completed, he will lock down rollers so bridge is held stable and cannot move until rollers are released at next bridge push. Tyngsborough, MA 2005.

My Construction Photos > Bridge construction, steel construction: Ironworker turning bolt to lock down rollers at bridge pier supporting Mabey temporary bridge after bridge has been pushed out toward next pier, in preparation for erecting additional prefab truss panels, to be pushed out in turn. Tyngsborough, MA 2005.

My Construction Photos > Bridge construction, steel construction: Rollers at east/ launch end acting on bottom chord/ structural element of Mabey steel truss panel temporary bridge over the Merrimack River on Route 113. Most obvious are the four lateral rollers on vertical spindles that keep bottom chord in alignment above the primary rollers. The primary rollers, the tops of which can just be seen to the right of the lateral rollers, on horizontal spindles/axles actually support the truss panels. They rotate when bridge frame is pushed. A bolt, as shown at far left mid-height of photo, is tightened against each primary roller at all other times to lock the roller and prevent the frame from moving. Tyngsborough, Massachusetts 2005.

My Construction Photos > Bridge construction, steel construction: Erected prefabricated truss panels and transverse joists are being pushed across rollers on top of temporary bridge piers. Ironworkers standing on top of each temporary bridge pier watch process and signal superintendent with hand signals/ radio if there is reason to stop. They also unlock and lock rollers to allow movement when dozers push and to prevent movement thereafter. Tyngsborough, MA 2005.

My Construction Photos > Bridge construction, steel construction: View toward west bank of Mabey Bridge that is being erected and pushed across Merrimack River from the east bank. The Mabey
Bridge will temporarily carry Route 113 vehicle traffic to allow rehabilitatrion of the adjacent steel truss bridge over the Merrimack River. At this point the bridge is two piers from its destination, to be pushed across the rollers on the pier it is approaching and then landed on the timber cribbing on the far piers. The bridge will be anchored at the west bank concrete abutment beyond the two far piers. Tyngsborough, Massachusetts 2005.

My Construction Photos > Bridge construction, steel pile construction: Concrete bridge abutment sits on the soil embankment on east side of Merrimack River. Soil is supported by retaining wall formed of vertical structural steel soldier beams/piles driven deep into the soil. Soil is directly supported by timber breastboards inserted between flanges of H-sections. (See inserted detail.) Tyngsborough, Massachusetts 2005.

My Construction Photos > Bridge construction, steel construction: View from west bank of Mabey Bridge that is being erected and pushed across Merrimack River from the east bank. The Mabey
Bridge will temporarily carry Route 113 vehicle traffic to allow rehabilitatrion of the adjacent steel truss bridge over the Merrimack River. At this point the bridge is two piers from its destination, to be pushed across the rollers on the pier it is approaching and then landed on the timber cribbing on the near piers. Tyngsborough, Massachusetts 2005.

My Construction Photos > Bridge construction, steel construction: The bowstring steel truss Merrimack River Bridge on Route 113 at Tyngsborough, and the prefabricated Mabey steel truss panel temporary bridge being erected alongside it. The beautiful old bridge will be rehabilitated while vehicles cross the river on the temporary bridge. Tyngsborough, Massachusetts 2005.

My Construction Photos > Scrap metal yard and cranes: Scrap steel pile on right side of photo is transferred between scrap heap and barges/ships at loading dock. Primary crane is large Mitsui Paceco 40 ton rail mounted gantry crane that dominates the site. Rotary mounted cabled operated truss boom crane is at loading dock. Oregon, Coluimbia River, 2005

My Construction Photos > Large bore pipe construction/equipment: Stihl TS 700 portable gasoline driven saw, 6.7 hp, 26.2 lb, with diamond embedded blade cuts large bore steel pipe in the field. Worker is wearing full surround safety glasses to avoid injury from steel chards produced by cutting. West Stadium, Ann Arbor, Michigan 2006

My Construction Photos > Large bore pipe construction/equipment: Stihl TS 700 portable gasoline driven saw, 6.7 hp, 26.2 lb, with diamond embedded saw blade has cut large bore steel pipe in two. Worker is now using the saw to make a bevel edge to the pipe. West Stadium, Ann Arbor, Michigan 2006

My Construction Photos > Pipe/steel, underground construction: Caterpillar 312B crawler mounted hydraulic backhoe/excavator prepares to lift and set pipe in trench it straddles. Standing worker at far left pulls on steel cable sling to tighten its loop around pipe. He will next hook sling over hook on his side of backhoe shovel, so backhoe can pick up pipe. Far left bent over worker is slipping black plastic bag over far end of pipe to keep it clean during placement. West Stadium, Ann Arbor, Michigan 2006.

My Construction Photos > Pipe/steel, underground construction: Caterpillar 312B crawler mounted hydraulic backhoe/excavator (out of view to right) lifts pipe to set pipe in trench it straddles. Worker is slipping black plastic bag over far end of pipe to keep it clean during placement. West Stadium, Ann Arbor, Michigan 2006.

My Construction Photos > Pipe/steel, underground construction: Caterpillar 312B backhoe is setting pipe in trench it straddles as worker at far end of trench guides pipe into position and worker at near end hustles into trench to help at this end. West Stadium, Ann Arbor, Michigan 2006.

My Construction Photos > Pipe/steel, underground construction: Caterpillar 312B crawler mounted hydraulic backhoe/excavator has lifted and set (unseen) large bore steel pipe in trench it straddles. It is now crowding pipe toward itself and previously laid pipe by reaching out backhoe boom and bucket and pulling it toward backhoe. The far worker in trench observes the gap between new and previous pipe and uses hand signals to direct backhoe operator. The near worker watches contact of bucket teeth with near end of pipe and signals safe/steady condition with his extended left hand. West Stadium, Ann Arbor, Michigan 2006.

My Construction Photos > Steel erection fall protection: Structural steel ironworker straddles wide flange structural steel beam. Fall protection provided by full body harness attached to safety lanyard attached to steel cable loop/sling around beam. Ross School of Business, University of Michigan, Ann Arbor. January, 2007.

My Construction Photos > Steel erection fall protection: Structural steel ironworker on left has fall protection from full body harness attached to safety lanyard attached to steel cable loop/sling around girder as he moves from left to right along wide flange structural steel girderl Here, he liftis cable loop/sling past steel plate attachment that will support far end of a steel floor beam/joist. Ironworker on right his apparently without fall protection, with one safety lanyard attached from cable loop/sling that hangs loose and other end attached to lower ring on his body harness. However, his second lanyard could be attached to a sliding beam flange anchor attached to top flange of girder. Ross School of Business, University of Michigan, Ann Arbor. January, 2007.

My Construction Photos > Structural steel ironworker arc welds corrugated steel deck to beams at periphery of floor opening. Standing ironworker is holding a steel angle iron to be welded in corner to provide support for perimeter cable fall protection (see the other two corners). Ross School of Business, University of Michigan, Ann Arbor. January, 2007.

My Construction Photos > Ironworker standing on scissor lift work platform tightens bolts with electric impact wrench that connect horizontal wide flange beam to vertical wide flange column. This connecting phase of structural steel construction, which follows the erection phase, consists of plumbing up the frame and installing permanent bolts/welds to complete the structural design and detailing connections. Ashley Terrace, Ann Arbor, Michigan April, 2007.

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