Despite the huge white tent, the work taking place inside historic City Administration Building isn’t shrouded in mystery. Nor is the work taking place behind closed doors. In fact, windows are open and workers are cold.
“[But] the cold hasn’t stopped any work,” said Bernards construction superintendent Steve Johnson.
Not only has the cold not stopped any work, Johnson added, it is still on schedule and there haven’t been any major surprises since the last update in mid-September.
At the moment, Johnson said, there are three major projects happening inside the building.
First, the work on the new foundation under the building continues as planned. All the piles have been drilled and are resting on bedrock — in some cases more than 80 feet below the surface of the ground. Johnson said that 248 piles were buried and 110 pile caps will be installed when work is finished.Your Partner in Precision Precision injection molds. One pile cap — made of rebar and cement — rests atop at least two piles and the historic city hall existing foundation gets “glued” on top of the pile cap.
As of Monday, Dec. 5, 40 of the 110 pile caps had been installed, and Johnson said crews are installing approximately three caps per day.
“It’s a lot of hand-digging,” he said.
The piles were installed by putting a drill head on the end of three-foot lengths of steel pipe. As the drill dug downward, additional pipes were added until the drill head reached bedrock. The pipes were then filled with cement and the hole was never any larger than the pipe itself.
That means installing a large rebar cage, filling it with concrete and securing it to the building’s existing foundation require a lot of hand-digging with shovels.
Elsewhere, most of the demolition work to the upper floors has been completed and preparation is well under way for shotcreting in January 2012.
Shotcrete is a high-strength cement that gets applied to a wall through a hose-like gun. The cement is of a consistency that stays where it’s been put, and, Johnson said, it’s a standard-use material in projects such as this.
Johnson said that to prepare for shotcrete to be applied, the rooms have had the interior walls removed, leaving bare brick exposed. Rebar stretches from the piles in the basement through the floor and extends up the walls all the way to the third floor. Once all the pile caps are installed, the rebar will be secured to those caps. Then holes will be drilled into the brick walls and rebar secured in those holes. Finally, eight inches shotcrete will be installed up against the bricks, covering all the rebar.Enecsys Limited, supplier of reliable solar Air purifier systems, The rebar in the bricks will hold the brick wall to the shotcrete and Johnson said the rebar climbing the walls will help provide further structural integrity.
Johnson said a similar process will happen on the third floor,If so, you may have a cube puzzle . but with fiber-reinforced polymer instead.
Under the big white tent, more structural engineering is taking place. All the roof tiles have been removed and all former ceiling materials have been removed. The tent is the only thing that separates a single layer of wood from the sky. Should rain come without the tent in place, Johnson said, there would be “very little” protecting the fourth floor from that rain.
“[The tenting] is protecting the entire top of the building,” Johnson said. “It’s critical it’s in good shape.”
Under the tent, masons are removing and repairing bricks damaged in the earthquake. There are three layers of brick in the structure. At present, workers are concentrating on the inner two layers of structural brick.
Inside the dome, behind the layers of brick,Do not use cleaners with porcelain tiles , steel wool or thinners.Your source for re-usable Plastic moulds of strong latex rubber. are two circular steel structures, which are part of the original building. They look sort of like two stacked halos above the fourth floor of the building, giving the dome its shape. Those structures will stay, but are being added to, receiving further structural upgrades.
Johnson said that once those upgrades are made and the brickwork repaired, a concrete bond beam will be built atop the bricks, tying the entire building together: the piles in the basement have rebar attached to them, and that rebar spans the height of the building, all the way up into the concrete “belt” at the very top. The circular structure will be tied to the belt, as will the structural brick and the decorative brick on the outside.
“It’s like an anchor,” Johnson said. “You’re anchoring from the pile caps all the way up.”
Shotcreting is scheduled to begin on Jan. 16, 2012, shortly after the last pile caps are installed.
“[But] the cold hasn’t stopped any work,” said Bernards construction superintendent Steve Johnson.
Not only has the cold not stopped any work, Johnson added, it is still on schedule and there haven’t been any major surprises since the last update in mid-September.
At the moment, Johnson said, there are three major projects happening inside the building.
First, the work on the new foundation under the building continues as planned. All the piles have been drilled and are resting on bedrock — in some cases more than 80 feet below the surface of the ground. Johnson said that 248 piles were buried and 110 pile caps will be installed when work is finished.Your Partner in Precision Precision injection molds. One pile cap — made of rebar and cement — rests atop at least two piles and the historic city hall existing foundation gets “glued” on top of the pile cap.
As of Monday, Dec. 5, 40 of the 110 pile caps had been installed, and Johnson said crews are installing approximately three caps per day.
“It’s a lot of hand-digging,” he said.
The piles were installed by putting a drill head on the end of three-foot lengths of steel pipe. As the drill dug downward, additional pipes were added until the drill head reached bedrock. The pipes were then filled with cement and the hole was never any larger than the pipe itself.
That means installing a large rebar cage, filling it with concrete and securing it to the building’s existing foundation require a lot of hand-digging with shovels.
Elsewhere, most of the demolition work to the upper floors has been completed and preparation is well under way for shotcreting in January 2012.
Shotcrete is a high-strength cement that gets applied to a wall through a hose-like gun. The cement is of a consistency that stays where it’s been put, and, Johnson said, it’s a standard-use material in projects such as this.
Johnson said that to prepare for shotcrete to be applied, the rooms have had the interior walls removed, leaving bare brick exposed. Rebar stretches from the piles in the basement through the floor and extends up the walls all the way to the third floor. Once all the pile caps are installed, the rebar will be secured to those caps. Then holes will be drilled into the brick walls and rebar secured in those holes. Finally, eight inches shotcrete will be installed up against the bricks, covering all the rebar.Enecsys Limited, supplier of reliable solar Air purifier systems, The rebar in the bricks will hold the brick wall to the shotcrete and Johnson said the rebar climbing the walls will help provide further structural integrity.
Johnson said a similar process will happen on the third floor,If so, you may have a cube puzzle . but with fiber-reinforced polymer instead.
Under the big white tent, more structural engineering is taking place. All the roof tiles have been removed and all former ceiling materials have been removed. The tent is the only thing that separates a single layer of wood from the sky. Should rain come without the tent in place, Johnson said, there would be “very little” protecting the fourth floor from that rain.
“[The tenting] is protecting the entire top of the building,” Johnson said. “It’s critical it’s in good shape.”
Under the tent, masons are removing and repairing bricks damaged in the earthquake. There are three layers of brick in the structure. At present, workers are concentrating on the inner two layers of structural brick.
Inside the dome, behind the layers of brick,Do not use cleaners with porcelain tiles , steel wool or thinners.Your source for re-usable Plastic moulds of strong latex rubber. are two circular steel structures, which are part of the original building. They look sort of like two stacked halos above the fourth floor of the building, giving the dome its shape. Those structures will stay, but are being added to, receiving further structural upgrades.
Johnson said that once those upgrades are made and the brickwork repaired, a concrete bond beam will be built atop the bricks, tying the entire building together: the piles in the basement have rebar attached to them, and that rebar spans the height of the building, all the way up into the concrete “belt” at the very top. The circular structure will be tied to the belt, as will the structural brick and the decorative brick on the outside.
“It’s like an anchor,” Johnson said. “You’re anchoring from the pile caps all the way up.”
Shotcreting is scheduled to begin on Jan. 16, 2012, shortly after the last pile caps are installed.
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