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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.
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 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.
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 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.
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.
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.
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 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.
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.
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.
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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