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My Construction Photos  > Construction Galleries > Concrete Construction: reinforcing, forms, saw, shore, precast, erect
concrete form, reinforce, shore, erect, prestress, precast, demolition
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My Construction Photos > Crane lifts precast concrete panel cladding panel from vertical racks on truck trailer to place it in position on west side of midrise residential building. Ashley Terrace, Ann Arbor, Michigan April, 2007.
My Construction Photos > Manitowoc crane with luffing boom lifts precast concrete panel cladding panel into position on west side of midrise residential building. Ashley Terrace, Ann Arbor, Michigan April, 2007.
My Construction Photos > Manitowoc crane lifts precast concrete panel cladding panel into position on west side of midrise residential building. Worker on left pulls panel toward building with tag line and his hand and worker on right reaches out with 2x4 lumber to pull right side tag line so he can reach it. Ashley Terrace, Ann Arbor, Michigan April, 2007.
My Construction Photos > Manitowoc crawler mounted lattice boom crane with luffing jib lifts hollow core precast concrete floor deck slab off flatbed trailer powered by Peterbilt semi tractor. Ashley Terrace, Ann Arbor, Michigan April, 2007.
My Construction Photos > Structural ironworker supported by Genie scissor lift electric arc welds steel seat angle to flanges of wide flange H column structural steel to support corner of hollow core precast concrete deck member. Manitowoc crane supports the precast member, waiting for seat angle to be attached. Two ironworkers wait to guide precast member into place, after seat angle is ready, using rope tag line hanging from corner of member. Ashley Terrace, Ann Arbor, Michigan April, 2007.
My Construction Photos > Structural ironworker uses tag line to manuever hollow core precast concrete slab section through steel structure members to place it in its proper position. It is a tight fit, which will require the ironworker on the left to move the section a little to the left using a pry bar. Precast member is supported by Manitowoc crane. Ashley Terrace, Ann Arbor, Michigan April, 2007.
My Construction Photos > Structural ironworker uses tag line to manuever hollow core precast concrete slab section through steel structure members, a tight fit, which the ironworker on the right assists by prying the section to the left with a prybar. Precast member is supported by Manitowoc crane. Ashley Terrace, Ann Arbor, Michigan April, 2007.
My Construction Photos > Structural ironworkers guide precast hollow core concrete slab member onto its supports, beam on left and beam and seat angle on right. Precast member is supported by Manitowoc crane. Ashley Terrace, Ann Arbor, Michigan April, 2007.
My Construction Photos > White-GMC truck tractor pulls trailer of large form panels into which concrete will be placed for basement walls of single family residences. Pittsfield Village, Michigan, March, 2007.
My Construction Photos > Concrete Construction: reinforcing, forms, saw, shore, precast, erect photo
My Construction Photos > Two precast concrete structural sections transported on flatbed semitrailer pulled by Kenworth tractor. Plymouth Road, Ann Arbor, Michigan. March 2007.
My Construction Photos > Worker carries dimension lumber on shoulder to provide support for cast in place concrete forms and/or fall protection, as we see around him. Worker in rear is performing rough carpentry on such lumber. Mosher Jordan Renovation and New Dining Center, University of Michigan, Ann Arbor, March 2007.
My Construction Photos > At far end, steel frame supports horizontal rebars for cast in place concrete beam. Top steel is supported at proper height by a transverse rebar, and height can be adjusted by small chain fall. Top steel supports U stirrups, which can themselves support horizontal bottom steel. Resteel sags under its own weight and needs additional support along its length. The resteel extends grade beams at near end, which has top steel exposed to bond to concrete slab floor. Colorado Street, Denver, Colorado, December 4, 2006.
My Construction Photos > Steel frame supports horizontal rebars for cast in place concrete beam. Top steel is supported at proper height by a transverse rebar, and height can be adjusted by small chain fall. Top steel supports U stirrups, which can themselves support horizontal bottom steel. Note that steel rebar cage sags under its own weight and requires additional support along its length. Colorado Street, Denver, Colorado, December 4, 2006.
My Construction Photos > Precast concrete tilt-up construction: Reinforced concrete wall section has been pulled up at its top into near vertical position to form section of outside wall of building. Wall section is heavily reinforced concrete that was cast in horizontal position on top of floor slab of building, which alleviated the need for wall forms. It is lifted by steel cable, hooked to wall at a 8 points to provide force sufficient to break wall free from the slab beneath it and lift it into its final vertical position. Two point support from lifting beams/ harness and pulleys provide independent support to each lifting point. Pipe with screw jacks at end align the wall and support it against wind forces. Workers 3, 5, and 6, from left to right, hold chain/cable with which they will jerk out pens locking the lifting cables to the slab wall, and they will next pull to withdraw pens to separate lifting tools from the wall. Phoenix, Arizona, November 2006.
My Construction Photos > Precast concrete tilt-up construction: Reinforced concrete wall section is pulled up at its top into near vertical position to form section of outside wall of building. Wall section is heavily reinforced concrete that was cast in horizontal position on top of floor slab of building, which alleviated the need for wall forms. It is lifted by steel cable, hooked to wall at a 8 points to provide force sufficient to break wall free from the slab beneath it and lift it into its final vertical position. Two point support from lifting beams/ harness and pulleys provide independent support to each lifting point. Phoenix, Arizona, November 2006.
My Construction Photos > Precast concrete tilt-up construction: Specialized lifting hardware for tilt-up wall construction by which crane can lift reinforced concrete walls from horizontal casting position to vertical position in wall. Primary hardware is steel lifting stud/anchor/bolt/plug, attached to reinforcing steel or wire embedded in concrete, as shown in circled inset, as it looks after lift is completed and hardware has been released. This is lifted by ground release lifting hardware consisting of a clasp/lock/grip that fits over the lifting stud/anchor and grips it while the attached lifting eye/bale applies lift. The lifting clasp/lock/grip has a release arm by which an attached rope/chain/cable is pulled down by worker on ground to release the lifting hardware from the wall after lift has been completed. A lifting clevis (red here) provides attachment to crane cable by which wall is lifted. Photo shows lifting hardware in place on right, before ground man has activated its release arm by pulling on attached release chain. To left is lifting hardware after its release from lifting stud/anchor. Phoenix, Arizona, November 2006.
My Construction Photos > Precast concrete tilt-up construction: Reinforced concrete wall section is pulled up at its top into near vertical position to form section of outside wall of building. As foreman on right signals crane operator to hold position of tilted up concrete slab wall section, workers inside and outside manually position bottom of section to sit on its foundation, forming corner with previously placed adjacent section. Worker on left holds up adjustable shore so it does not drag on ground/slab and impact positioning. Phoenix, Arizona, November 2006.
My Construction Photos > Precast concrete tilt-up construction: Reinforced concrete wall section was pulled up at its top by crane into near vertical position to form section of outside wall of building. Worker uses impact drill to make hole in slab into which to bolt bracket that supports diagonal shore/brace to hold wall up until roof structure is in place. Phoenix, Arizona, November 2006.
My Construction Photos > In background from far right to left are (1) concrete basement walls with forms removed, (2) vertical reinforcing steel for concrete basement walls still to be cast. (3) Gang forms in place for casting basement wall, (4) vertical reinforcing steel for concrete basement walls still to be cast. Sitting away from basement walls are 3 gang forms used for basement walls. Ashley Terrace, Huron St, Ann Arbor, Michigan 2006
My Construction Photos > Concrete cast-in-place construction: Gang forms for cast-in-place (CIP) reinforced concrete deep foundation/basement walls. Gang forms are sets of large form panels attached and braced together and moved by crane from place to place to cast large sections of concrete. The vertical concrete wall at lower right was cast using the gang form in middle of photo, rotated 90 degrees. It has been lifted and rotated into its current position by the crane. It will probably be lifted and rotated to form the wall section to the immediate left of the one it recently placed. Another gang form is in place on the right wall against which the next wall section will be cast. Workers at right are finalizing the details of reinforcing steel in preparation for the form to be placed. Reinforcing steel is being erected for the far wall to follow the wall on the right. In photo center is JLG telescoping boom man lift. The orange “mushrooms” in extreme foreground are reinforcing rod caps to protect workers who might fall onto the ends of the vertical rods. Ashley Terrace, Huron St, Ann Arbor, Michigan 2006
My Construction Photos > Concrete cast-in-place construction: Gang forms for cast-in-place (CIP) reinforced concrete deep foundation/basement walls. Gang forms are sets of large form panels attached and braced together and moved by crane from place to place to cast large sections of concrete. The vertical concrete wall at lower right was cast using the gang form in middle of photo, rotated 90 degrees. It has been lifted and rotated into its current position by the crane (see boom shadow) and cables attached to its top. It will probably be lifted and rotated to form the wall section to the immediate left of the one it recently placed. Another gang form is in place on the right wall against which the next wall section will be cast. Workers at lower right are finalizing the details at bottom of reinforcing steel in preparation for the form to be placed. Reinforcing steel is being erected for the far wall to follow the wall on the right. Still another gang form in the lower right corner of photo is still in place after casting the lower right corner of the basement. Ashley Terrace, Huron St, Ann Arbor, Michigan 2006
My Construction Photos > Reinforcing ironworkers tie reinforcing steel mats together in preparation for casting the concrete foundation/basement wall. Each is tied to the steel in two places with safety hooks, lanyards, and full body harness to provide protection from falling. As they move, they alternate unhooking and hooking their hooks top always have one safety tie in position. Ashley Terrace, Huron St, Ann Arbor, Michigan 2006
My Construction Photos > Two reinforcing ironworkers wire lower end of cable slings to reinforcing steel mat, with upper end wired to erection/lifting beam, for crane to lift and transport mat to build cast in place reinforced concrete basement wall. Ashley Terrace, Huron St, Ann Arbor, Michigan 2006
My Construction Photos > Crane moves concrete wall gang form into position. Visual analysis of form structure shows it is pieced together from 8 form panels. Already in place are the opposing side of the forms, reinforcing steel, and form bulkhead. The bulkhead forms a temporary construction joint, against which the next concrete will be placed, after which the bulkhead is removed so the following concrete can be placed against the last concrete placed. Ashley Terrace, Huron St, Ann Arbor, Michigan 2006
My Construction Photos > The dark object is a structural steel plate to which steel studs/rods have been welded, which the two workers are attaching to the inside of the wall form so the studs will be embedded into the basement wall, and the face of the plate will face outward from the concrete wall. The two workers are standing on the work platform of a JLC hydraulic telescoping boom man lift. Toward us are the controls by which the workers can control travel of the lift and boom. Ashley Terrace, Huron St, Ann Arbor, Michigan 2006
My Construction Photos > Cast in place concrete construction: Cast in place concrete structure for addition to school. Reinforcing steel protrudes from top of columns to be imbedded into concrete columns of next floor. Adjustable length shoring supports forms for casting the floor slab for second floor. Vertical adjustable length shores support formwork girders, which support formwork joists that support slabe sheathing that supports cast in place concrete slab ceiling/floor. On top of slab forms are stored lengths of horizontal shoring and sheathing. Mast of tower crane is in upper middle of photo. Orange vertical material is structural clay tile wall. Passau, Germany July 2006
My Construction Photos > Concrete construction, formwork, cast in place: Structure to support slab for interior room. Welded steel tubular modular scaffold sections support screw jacks bearing stirrups turned upward. Scaffold sections are supported against lateral loads (loads from the side) by steel cross braces. Cap beams span stirrup supports and themselves support steel/aluminum stringers, which in turn support aluminum joists that parallel the cap beams. Joists support sheathing, probably plywood, which directly supports the cast in place concrete. A similar structure supports the other end of joists. Reinforced concrete structure commercial building at central square of the town of WaterColor, Florida Panhandle, June 2006.
My Construction Photos > Concrete construction, formwork, cast in place: Gang form now erected above and to right of arch was previously used to cast the concrete above and to left of arch. The entire form module was moved from left to right. The window/door holes on left side were formed by block-outs between the form walls, and they are repeated on the right. A block-out is a rough frame between the exterior forms that prevents cast wet concrete from entering a space. Reinforced concrete structure commercial building at central square of the town of WaterColor, Florida Panhandle, June 2006.
My Construction Photos > Concrete construction, formwork, cast in place: Gang form now erected here above and to right of arch was previously used to cast the concrete above and to left of arch. The entire form module was moved from left to right. The window/door holes on left side (see other photo) were formed by block-outs between the form walls, and they are repeated here. A block-out is a rough frame between the exterior forms that prevents cast wet concrete from entering a space. Reinforced concrete structure commercial building at central square of the town of WaterColor, Florida Panhandle, June 2006.
My Construction Photos > Concrete construction, formwork, cast in place: Cast in place concrete after form is removed. The gang form used here is now erected above and to right of arch. The entire form module was moved from here to right. The window/door holes here were formed by block-outs between the form walls, and they are repeated on the right. A block-out is a rough frame between the exterior forms that prevents cast wet concrete from entering a space. Reinforced concrete structure commercial building at central square of the town of WaterColor, Florida Panhandle, June 2006.
My Construction Photos > Concrete/residential construction: Schwing truck mounted concrete pump and hydraulic boom receives concrete from Mack readymix concrete truck and places it in Arxx hollow polystyrene insulating plastic wall forms. Outriggers extended from pump truck stabilize truck/pump as boom reaches and changes position. Pensacola, Florida June 2006.
My Construction Photos > Concrete/residential construction: Cast in place concrete is being placed into Arxx hollow polystyrene insulating plastic wall forms using plywood side forms at top of sloped Arxx wall forms. From right to left, workers are (1) placing concrete on right side of forms through elephant trunk extending down from the end of the hydraulic boom of a Schwing truck mounted concrete pump; (2) removing top form panels from top of concrete/forms on left side of wall; (3) filling in and troweling top of cast concrete, and (4) extending vibrator into concrete placed prior to that in the left side of the wall. At lower center of photo is window opening with shore and bottom forms to support concrete placed above window until the concrete attains sufficient strength to support itself and loads imposed above the window. Pensacola, Florida June 2006.
My Construction Photos > Concrete/residential construction: Schwing truck mounted concrete pump and hydraulic boom receives concrete from Mack readymix concrete truck and places it in Arxx hollow polystyrene insulating plastic wall forms. Outriggers extended from pump truck stabilize truck/pump as boom reaches and changes position. Pensacola, Florida June 2006.
My Construction Photos > Concrete/residential construction: Residential wall construction using Arxx hollow polystyrene insulating plastic wall forms filled with reinforced cast in place concrete. Upper left-middle shows rebars extending out of lower floor wall concrete to tie that concrete into the next higher section of concrete wall. Interior framing on lower floor is galvanized steel sheet metal studs and ceiling joists, with temporary shoring, supporting cast in place ceiling/floor above. Second level ceiling is heavier sheet metal studs to support floor above it. Pensacola; Florida June 2006.
My Construction Photos > Concrete/residential construction: Arxx hollow polystyrene insulating plastic wall forms scraps showing the hollow core and the metal ties/reinforcing supports on the interior. Pensacola, Florida June 2006.
My Construction Photos > Reinforced concrete construction: Reinforcing steel for scalloped shape curved cast-in-place concrete wall. Scallop bent 1x4 boards form template for placement and wire tying of vertical reinforcing steel for concrete wall. Cross members provide stable anchorage for horizontal flat lumber. Resteel is tied to the lumber template. New Ann Arbor high school 2006
My Construction Photos > Reinforced concrete construction, construction safety: Bright orange protective/safety rebar caps blunt the ends of rebars to protect workers from most serious injury, should one fall upon extended rebars. The rebars extend from continuous footings to tie into reinforced concrete wall that is supported by the footing. New Ann Arbor high school 2006
My Construction Photos > Concrete/masonry construction: Outside exhibits of concrete placement, distribution, screeding, textures, finishing. Demonstration area with grandstand is at lower left. World of Concrete/Masonry, Las Vegas, Nevada January 2006
My Construction Photos > Concrete/masonry construction: Outside exhibits of concrete placement, distribution, screeding, textures, finishers. World of Concrete/Masonry, Las Vegas, Nevada January 2006
My Construction Photos > Reinforced concrete structure construction: Basement construction using shotcrete applied reinforced concrete. Shotcrete is being applied to upper half of wall at left center, with one worker spraying shotcrete and the other cleaning off over-shot/excess that accumulates on back form and reinforcing steel. Worker at mid-right is troweling upper half of shotcrete wall, creating a smooth finish. Between the two, at mid photo, is shotcrete equipment, consisting of concrete mixer delivering the shotcrete/concrete mixture and the concrete pump and air compressor spraying the shotcrete/concrete. In background is basement exterior wall. The right side is of shotcrete reinforced concrete. The left side has back form and steel reinforcing steel, waiting for application of shotcrete to complete the wall. Scaffold is in place to support the shotcrete team. Beyond the shotcrete wall on right is temporary soil support structure: steel H-section soldier beams supporting timber breastboards with additional support from steel tiebacks anchored at far end in soil. On left side, soil for upper half of excavated wall has been sloped back to angle of repose of undisturbed soil. The vertical wood forms at various points supported on one side by diagonal braces are backforms for shotcrete. Pallazo, Westwood, Los Angeles, California, January 2006.
My Construction Photos > Earthwork/foundation/basement construction, soil support: Scaffold at center supports reinforcing ironworkers erecting/tying reinforcing steel for shotcrete reinforced concete basement wall to support earth embankment created by basement excavation. The resulting reinforced concrete retaining wall will be the same as the completed reinforced basement wall in the background. The large bore steel diagonal pipe/tubes support the lower part of the wall until the shotcrete has been placed and cured, at which time tie-backs in tension extending into the soil will provide support for the wall, as shown in the wall in the background. The side of the sloped soil embankment on the right is supported by vertical H-section soldier beams that support timber breastboards fitted between the flanges of adjoining H-sections. In addition, the two taller soldier beams are supported by steel pipes/tubes in compression pressing against soldier beams of the far right embankment support. In lower foreground is ramp access to bottom of excavation, by which trucks and equipment enter and leave the hole. Pallazo, Westwood, Los Angeles, California January 2006.
My Construction Photos > Reinforced concrete structure construction: Carpenter climbs down column formwork using column form horizontal support clamps as steps, hand holds, and fall protection anchor points. The column is between the 4th and 5th floors, so carpenter is 45-50 ft above ground next to edge of floor as he climbs and works on outside of column formwork. Photo shows 5 stages, starting at left and moving to right as carpenter climbs down. He is wearing full body harness, with two safety lanyards hooked to the midbody rear ring. At start, his left side lanyard, hidden from view, is hooked to a support bracket to his front right near his right hand, and the right side lanyard is hooked to another body ring. 2nd photo shows this as he steps down and to right side. At 3rd photo he has hooked end of lanyard to 3rd clamp/bracket from top. He has stepped down in 4th photo and released and hooked to 4th clamp down in 5th photo. Carpenter is wise to use fall protection, which would have been improved if he had used both safety lanyards, hooked to one as the other is moved between anchors. Denver, Colorado December 2005.
My Construction Photos > Building/vertical construction: 23-story reinforced concrete structure 360 unit loft residential building. Cast-in-place concrete structure is being cast at 1-story per week. The top floor being cast has polyethylene plastic weather protection. Formwork has been removed on all floors shown, to be placed for next floor. The upper three floors are reshored (formwork removed and shores replaced) to distribute the load of the new and recent concrete placements among several floors. Galvanized steel bent sheet metal framing is being erected on the lower floors for exterior walls and interior partitions. Construction elevator is at near corner of building. Project is serviced by two tower cranes. Glass House, Denver, Colorado, December 2005.
My Construction Photos > Bridge construction: Concrete formwork for bridge pier. Epoxy coated reinforcing steel for pier buttresses is not yet enclosed in formwork. Broadway Bridge, Ann Arbor, 2003.
My Construction Photos > Concrete construction/demolition: Gasoline powered concrete saw with diamond embedded blade and water cooling and dust control saws a cut in concrete curb and stormwater drain in order to replace drain/gutter. Ann Arbor 2005.
My Construction Photos > Concrete construction/demolition: Gasoline powered concrete saw with diamond embedded blade and water cooling and dust control saws a cut in concrete curb and stormwater drain in order to replace drain/gutter. Ann Arbor 2005.
My Construction Photos > Concrete construction: Tying reinforcing steel (resteel) bars (rebars) for reinforced concrete bridge deck. Resteel is coated with green colored epoxy to resist corrosion from winter road salting. Rebars are placed in top and bottom of slab, both longitudinal (along length of bridge deck) and transverse (across deck). Rebars are tied at intersections to provide support and hold them in place until concrete is cast around them for bridge deck. Broadway Bridge, Ann Arbor, 2003.
My Construction Photos > Concrete construction: Tying reinforcing steel (resteel) bars (rebars) for reinforced concrete bridge deck. Resteel is coated with green colored epoxy to resist corrosion from winter road salting. Rebars are placed in top and bottom of slab, both longitudinal (along length of bridge deck) and transverse (across deck). Rebars are tied at intersections to provide support and hold them in place until concrete is cast around them for bridge deck. The reinforcing ironworker (clockwise from bottom) loops wire around rebars, pulls it tight, twists it, and cuts off the ends using end grip, side cut pliers (see detail). Ironworker pulls tie wire reel attached to his belt on his left hip. Broadway Bridge, Ann Arbor, 2003.
My Construction Photos > Concrete construction: Tying reinforcing steel (resteel) bars (rebars) for reinforced concrete bridge deck. Resteel is coated with green colored epoxy to resist corrosion from winter road salting. Rebars are placed in top and bottom of slab, both longitudinal (along length of bridge deck) and transverse (across deck). Rebars are tied at intersections to provide support and hold them in place until concrete is cast around them for bridge deck. Broadway Bridge, Ann Arbor, 2003.
My Construction Photos > Expansion joint construction: Expansion joint and reinforcing steel bars (rebars) for reinforced concrete bridge deck. Resteel is coated with green colored epoxy to resist corrosion from winter road salting. Rebars are placed in top and bottom of slab, both longitudinal (along length of bridge deck) and transverse (across deck). Rebars are tied at intersections to provide support and hold them in place until concrete is cast around them for bridge deck. In photo center is a cast-in-place expansion joint of galvanized (zinc coated) steel. It will be anchored in the cast concrete by the galvanized steel shear studs welded to the joint edges. The expansion joint gap/space is temporarily filled with polystyrene during the concrete construction process. It will be replaced by elastomer filler that can expand and contract as the bridge deck expands and contracts with daily temperature changes. Broadway Bridge, Ann Arbor, 2003.
My Construction Photos > Concrete building construction: Lower right is steel frame shoring for concrete structure to be cast at midheight of photo. Left half is midpoint of forming and shoring for next floor of the concrete structure, with formwork at top and vertical steel frame reshoring at midheight to distribute weight of new concrete between the two concrete floors now in place. Formwork for next floor of concrete structure. Right rear of photo is formwork for vertical concrete walls, with temporary catwalk on the outside for access by workers. Stored, stacked steel shoring is lower right. Science Instruction Center Building, University of Michigan, Ann Arbor, 2002.
My Construction Photos > Lower half is steel frame shoring for concrete structure to be cast at midheight of photo. Left upper is forming and shoring for next floor of the concrete structure. Right upper is formwork for vertical concrete walls, with temporary catwalk on the outside for access by workers. Science Instruction Center Building, University of Michigan, Ann Arbor, 2002.
My Construction Photos > Concrete building construction: Formwork for next floor of concrete structure. Upper half of photo shows slab formwork for next concrete placement. Horizontal steel beams support wood joists, which support plywood sheathing, which will support new concrete floor slab. Vertical pipe and frame shores support beams. The pipe and frame shores will carry new concrete load to the slab whose underside is in lower half of photo. Steel cross bracing provides support against lateral/horizontal loads. The pipe frame shores in lower portion will help distribute some of the new concrete slab weight to the slab(s) below what is shown. Epoxy coated (green) reinforcing steel will tie new concrete structure to the concrete structure shown. Science Instruction Center Building, University of Michigan, Ann Arbor, 2002.
My Construction Photos > Concrete slab construction: Concrete pavement saw cuts concrete sidewalk. Santa Monica, CA, 2003
My Construction Photos > Concrete pipe construction: Rotary diamond blade saws hole in concrete pipe-1. Huron Village Shopping Center, Ann Arbor, 2003.
My Construction Photos > Concrete pipe construction: Rotary diamond blade saws hole in concrete pipe-2. Huron Village Shopping Center, Ann Arbor, 2003.
My Construction Photos > Concrete/masonry construction: Stihl TS400 gasoline engine powered masonry cut-off saw with diamond cutting wheel (circular saw blade) to cut units and small segments of concrete, asphalt, and masonry. Depot Street, Ann Arbor, 2004.
My Construction Photos > Bobcat 763 skid steer tractor with pavement breaker attachment.
My Construction Photos > Bobcat 763 skid steer tractor uses pavement breaker attachment to break up concrete sidewalk.
My Construction Photos > Bobcat 763 skid steer tractor with loader attachment dumps concrete debris into dumpster. Hawthorne Suites, Chelmsford, Massachusetts, 2003
My Construction Photos > Concrete construction demolition: Sullivan-Palatek D185Q portable air compressor drives air hammer breaking concrete. Broadway Bridge, Ann Arbor, 2004.
My Construction Photos > Concrete construction demolition: John Deere 310G backhoe loader moves waste concrete away from jack hammered area. Broadway Bridge, Ann Arbor, 2004.
My Construction Photos > Reconstruction of spectator seating. Upper portion, except for one section, is new seating. Far left and right lower sections are old seating. Left middle is old concrete with seats removed. The old concrete is being demolished with pavement breakers on the booms of the backhoes just below and to its right. Main area is demolished seating base concrete. Lower left backhoe loads rectangular debris bucket that lattice boom crane then raises and dumps outside stadium. Workers are hand grading soil base for new concrete seating base in mid right. Formwork for new concrete base is being erected in lower center/right. The Big House, Michigan Stadium, University of Michigan, Ann Arbor, 2004.
My Construction Photos > Reconstruction of spectator seating. Upper portion is new seating. Left mid-upper is old concrete with seats removed. Two backhoes with pavement breaker attachments are demolishing the old concrete. Main area is demolished seating base concrete. Backhoe in foreground waits to load debris into a bucket that crane will then raise and dump outside stadium. The Big House, Michigan Stadium, University of Michigan, Ann Arbor, 2004.
My Construction Photos > Reconstruction of spectator seating. Upper portion is new seating. Left mid-upper is old concrete with seats removed, and backhoe with pavement breaker attachment, demolishing old concrete. Main area is demolished seating base concrete. Right mid-upper is concrete stair stringers, not yet demolished. Backhoe in foreground loads rectangular debris bucket that crane will then raise and dump outside stadium. The Big House, Michigan Stadium, University of Michigan, Ann Arbor, 2004.
My Construction Photos > Reconstruction of spectator seating. Upper portion is new seating. Left middle is demolished old concrete, waiting for removal. Workers at mid-right are hand grading soil base for new concrete seating base. Formwork for new concrete base is being erected in lower section of seating area. The Big House, Michigan Stadium, University of Michigan, Ann Arbor, 2004.
My Construction Photos > Concrete construction: Reinforcing steel ironworkers erect resteel for integrated reinforced concrete wall and columns, standing on formwork structure some 16-20' above ground. Formwork is plywood sheathing, supported by horizontal double angle wales. Horizontals are supported by vertical double angle wales, which are themselves supported by she-bolt removable tension ties that span the form structure. UCLA, Los Angeles, CA, 2003. Scott M. Carr
My Construction Photos > Bridge construction: Laydown area for construction of bridge across railroad tracks and Huron River. Primary material stored is lumber and form panels and components for construction of this concrete bridge. Mobile hydraulic crane and truck mounted light hydraulic crane help lift material. Also in photo are flatbed truck, backhoe, water truck, and scissor lift.Broadway Bridge, Ann Arbor, 2003.
My Construction Photos > Concrete construction: Simpson concrete formwork system wall panels in place for cast-in-place basement/ foundation walls. Panels consist of coated plyform on steel frames, connected by pin system, supported by Simpson brace hardware mounted pm 2 inch dimension lumber. YMCA, Ann Arbor, 2003.
My Construction Photos > Construction crane: Manitowoc 555 cable-rigged crawler-mounted open-lattice boom crane with jib supports construction of concrete retaining wall,supported by tie-backs, for deep excavation. Cardiovascular Center, University of Michigan, Ann Arbor, MI, 2004.
My Construction Photos > Concrete construction: Carpenter, supported by Genie telescoping personnel lift, pulls fits pieces of cut lumber for bulkhead in formwork for concrete placement for retaining wall. Bulkhead forms a short term construction joint in the concrete, until the next section of concrete is placed to the left. Cardiovascular Center, University of Michigan Hospital, Ann Arbor, 2004.
My Construction Photos > Concrete construction: Carpenter, supported by Genie telescoping personnel lift, pulls up pieces of cut lumber for bulkhead in formwork for concrete placement for retaining wall. Bulkhead forms a short term construction joint in the concrete, until the next section of concrete is placed to the left. Cardiovascular Center, University of Michigan Hospital, Ann Arbor, 2004.
My Construction Photos > Concrete construction: Carpenter, supported by Genie telescoping personnel lift, turns to fit slotted piece of cut lumber to horizontal rebars that penetrate formwork to give continuity to the retaining wall reinforcing. (Note the rebar penetrating the bulkhead below the blue platform. Bulkhead forms a short term construction joint in the concrete, until the next section of concrete is placed to the left. Cardiovascular Center, University of Michigan Hospital, Ann Arbor, 2004.
My Construction Photos > Concrete retaining wall construction: Retaining wall in background is in four phases: (1) complete, just right of cneter, (2) formwork erection in center, (3) reinforcing erected just to left of center, and still unreinforced in far left. Three carpenters erect formwork using Genie telescoping mobile lifts. Carpenter form erection tool box is in left center, and carpenter form fabrication is right center foreground. Rebars protrude from footing in foreground, to provide continuity to concrete foundation wall to come. Right foreground shows foundation wall exterior formwork. Other equipment shown is rough terrain forklift to far left, backhoe in background to its right, air compressor in mid-left foreground, wheeled tractor in right background, hydraulic crane boom at top right, and large cable crane at top center. Cardiovascular Center, University of Michigan Hospital, Ann Arbor, 2004.
My Construction Photos > Building Construction: Two large segments of a large building site: Retaining wall and foundation construction to left and structural steel construction to right. Mobile crawler crane serves the left, and tower crane serves the right. Cardiovascular Center, University of Michigan Hospital, 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 > Earthwork, concrete construction: Manufactured formwork system consists of metal framed, plyform/ fiber sheathed panels connected by system connections supported horizontally by adjustable steel tube shores anchored to cast concrete blocks. Reinforcing steel is/ will be erected on the opposite side, after which a second set of form panels will be erected on the other side of the resteel to complete forms for cast-in-place concrete. Cardiovascular Center, University of Michigan Hospital, Ann Arbor, 2004.
My Construction Photos > Concrete construction: Peri concrete formwork system wall panels in place for cast-in-place basement/ foundation walls. Panels consist of coated plyform on steel frames, connected by Peri connection system, supported by Peri adjustable braces. Cardiovascular Center, University of Michigan, Ann Arbor, 2004.
My Construction Photos > Concrete construction: Peri concrete formwork system wall panels in place for cast-in-place basement/ foundation walls. Panels consist of coated plyform on steel frames, connected by Peri connection system of edge clamps and pins. Cardiovascular Center, University of Michigan, Ann Arbor, 2004.
My Construction Photos > Concrete construction: Formwork and other temporary support for cast in place (CIP) reinforced concrete structure for multi-story building in Los Angeles, a quite active seismic zone. The formwork is for the 7th floor flat plate slab and the 8th floor columns. What looks somewhat like wall formwork around part of the exterior is a sheathed fall protection guard rail. Column forms are the vertical wood rectangular forms, with steel outside horizontal, spaced support brackets. These forms surround the column steel reinforcing, erected as steel cages. The slab formwork is plyform sheathing to support the concrete, metal horizontal joists to support the sheathing, galvanized steel shoring trusses, with screw jacks at base, spaced to support joists. The concrete slabs and columns for the floors below the 7th floor were formed in the same way. Reinforcing steel was placed after the forms are in place, followed by concrete placement. After concrete hardened perhaps a week, the forms are removed to be used for the floor above. Thus, this is about the 7th time these slab forms have been used on this building. The vertical shores under floors 4, 5, and 6 are reshores to distribute the 7th floor concrete construction loads to floors 3, 4, and 5. Thus the shores under the 7th floor transfer the weight of 7th floor concrete and workers to the 6th floor still young concrete slab and and the reshoring distributes most of that load down further to the 5th, 4th, and 3rd floor slabs and columns. Therefore, as slab forms are dismantled, vertical shores are placed to help support the coming floors above. Wilshire Blvd, Westwood, Los Angeles, CA, 2004.
My Construction Photos > Concrete construction: Formwork and other temporary support for cast in place (CIP) reinforced concrete structure for multi-story building in Los Angeles. This is a post-tensioned cast in place (CIP) reinforced concrete flat plate structural system. Flat plate because it is a slab supported by columns without girders, beams, or column capitols. Post-tensioned in that high-strength steel cables within the slab are highly tensioned after the concrete has gained its strength. What looks somewhat like wall formwork around part of the exterior is a sheathed fall protection guard rail. Column forms are the vertical wood rectangular forms, with steel outside horizontal, spaced support brackets. These forms surround the column steel reinforcing, erected as steel cages, some of which have not yet had forms erected around them. The slab formwork is plyform sheathing to support the concrete, metal horizontal joists to support the sheathing, galvanized steel shoring trusses, with screw jacks at base, spaced to support joists. The vertical shores under the lower slab, from which forms have been removed, are reshores to distribute the new floor's concrete construction loads to the floor(s) below. Therefore, as slab forms are dismantled, vertical shores are placed to help support the coming floors above. Wilshire Blvd, Westwood, Los Angeles, CA, 2004.
My Construction Photos > Concrete construction, prestressed concrete: Holes and grout for post-tensioned prestressed concrete high tension cables and anchors. These are evident at both slabs and both column faces. Horizontal hollow tubes are placed in the slab and column forms so they are embedded in the slab and column CIP concrete. High tension post-tensioning steel cables are threaded into the tubes. Other reinforcing is placed, and the concrete is then cast in place in the forms. After the slabs have attained high strength, tensioning jacks are placed horizontally at one or both ends of a cable, the jacks push against the slab/ column concrete and pull on the cables, which develops compression in the concrete and high tension in the cables.The compression counteracts tension in the concrete slab from carrying its own concrete weight plus loads placed on the slab. The cables are anchored at their ends, back into the hole. The small cavities in the slab/ column left at the end of the cables is filled with cement grout, which is a mixture of concrete, sand, and water. In this photo, post-tensioning has been completed, and grouting has been completed for all cable ends except those on the face of the upper portion of the column. A close look at the ungrouted holes shows cable ends in a couple of the holes. Wilshire Blvd, Westwood, Los Angeles, CA, 2004.