Port Milwaukee equipment is used to remove the pieces from the container with a semi-trailer used to bring them to the job site.
The containers arrive first on the East Coast, clearing customs in Chicago and are temporarily stored at Milwaukee’s port. Each floor deck comes in eight shipping containers and the columns and beams in another seven.
The structure is rising quickly now, as much as a floor a week, but depends on a fragile supply chain. As a result, the screw pen and the top floor each have sizable battery charging stations. Approximately 1,000 screws are needed per floor. CD Smith project manager Chris Johansen said each cordless drill can only drive eight of the screws before a new battery is needed. The largest screws impose a logistical challenge. A traditional, wood-framed apartment building would be constructed primarily with nails. Before climbing the tower, Gokhman showed me a room that stores nothing but different screws, some as long as 30 inches. Working with mass timber changes the type of supplies needed at a job site. Gokhman said the company is considering displaying part of the remnants in a display case in the lobby. The materials New Land selected underwent a successful, three-hour fire test in early 2020. Mass timber is engineered to offer even greater fire resistance. Made from dense, old-growth lumber, the structure of historic wood buildings doesn’t bend and collapse like steel. The principles of this methodology can be seen in century-old wood buildings that burn like Trinity Lutheran Church. Should the building ever suffer a fire, the thickness of the pieces is intended to cause the structural pieces to char, not burn. The two product types are often used together to create a structure that is lighter than concrete, faster to assemble and fire resistant. Known as glulam, the lumber that makes up those pieces are glued together, but unlike CLT all of the layers go in the same direction to transfer the weight of the structure. The columns and beams that come together between each floor deck are from Wiehag and use a different mass timber strategy. Peering into a partially assembled joint, you can see five perpendicular, horizontal layers that form the floor deck pieces (known as cross-laminated timber or CLT) from supplier KLH Massivholz. While two stair and elevator columns currently stand at what will be 17 floors above the ground, the structure of the building above the parking garage will be supported entirely by mass timber. Now that concrete, which stops when it reaches the seventh-floor pool, has given way to structural mass timber. A six-story parking structure was built on site from concrete. A wood-grain-finish floor will be installed atop a radiant heating system and insulation layer, accenting the White Spruce mass timber.īut for the first few months of Ascent’s construction, it looked like virtually any other tower. Wherever possible, the mass timber will be exposed in the walls and ceilings.
“It’s warmer, more beautiful, it just feels good,” said New Land managing director Tim Gokhman of the apartment’s interior aesthetics during a tour of the partially completed building. The company is among many investors and firms across the world that are optimistic about the future of mass timber. Twice floors were added to the building as further engineering was done. When finished, the 25-story building will rise 283 feet, eclipsing the current world leader, the Mjos Tower in Norway, by three feet.ĭeveloper New Land Enterprises spent years refining the project after announcing it in 2018. It will also be the tallest building of its kind in the world. The end result is expected to take less time to build, be more environmentally friendly to construct and rent faster with tenants staying longer. The width of the load-bearing pieces shrinks as the building climbs higher, reflecting the decreasing weight they need to support. Each column has corresponding male and female metal joints to connect with the adjoining pieces. If a pipe needs to go through a floor the corresponding hole was precut into the beam in Europe. Provided by two different European suppliers, each piece has been designed for a specific location in the building. A just-in-time supply chain delivers truckloads of mass timber, an engineered product made by combining layers of lumber into a stronger material, to the site at 700 E.
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