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NRMCA names Environmental Excellence Awards winners

Source: National Ready Mixed Concrete Association, Silver Spring, Md.

Nine plants in seven states have earned 2019 NRMCA Environmental Excellence Awards. Now in its 24th year, the program offers producer members national recognition for outstanding contributions to protecting the environment and maintaining sound pollution control and abatement practices. The NRMCA Safety, Environmental and Operations Committee names plants and their owners by region, saluting this year:

Read more: NRMCA names Environmental Excellence Awards winners

Dodge forecasting veteran succeeds Chief Economist Murray

Source: Dodge Data & Analytics, New York 

Dodge Data & Analytics Senior Economist Richard Branch is successor to Chief Economist Robert Murray, who retired at the end of August. After a decade in his former role, Branch is now tasked with ensuring the service’s continued preeminence in tracking, analyzing and forecasting North American construction activity. He will work with clients and national, regional, or trade media to share insights on residential and commercial building plus nonbuilding markets. Branch will likewise play lead roles in producing or overseeing the monthly Dodge Momentum Index, National Construction Starts research, and annual Dodge Construction Outlook Conference. 

Read more: Dodge forecasting veteran succeeds Chief Economist Murray

Rebar-free, but steel-laden, HPC core shoulders 850-ft. Seattle tower

Sources: Magnusson Klemencic Associates, Lease Crutcher Lewis, and Wright Runstad & Co., Seattle; CP staff

A 58-floor mixed-use tower in Seattle has topped out after a 10-month schedule on the strength of a unique core wall system with requisite volumes of high performance concrete but no conventional rebar. Rainier Square Tower marks the debut of what local engineer Magnusson Klemencic Associates (MKA) dubs the Concrete-Filled Composite Plate Shear Wall (CPSW) system. In contrast to a conventional reinforced concrete wall with large diameter rebar, the system as engineered for the 850-ft. structure redirects steel to composite panels: Half- or ¾-in. thick plates, connected with 1-in. diameter steel cross ties running vertically and horizontally on 12-in. center grids. 

Read more: Rebar-free, but steel-laden, HPC core shoulders 850-ft. Seattle tower

Corps, Marines unit proves high volume, large bead 3D concrete printing

Source: Marine Corps Systems Command, U.S. Army Corps of Engineers Construction Engineering Research Laboratory, Champaign, Ill.

Marine Corps Systems Command and 7th Engineer Support Battalion staff joined U.S. Army Corps of Engineers Construction Engineering Research Laboratory (CERL) colleagues earlier this month to test a 3D concrete printing operation with a late model volumetric mixer feeding a 3-in. nozzle. The demonstration was aimed fabricating a bunker and followed barrack and bridge structure printing with a 2-in. nozzle-equipped assembly. 

Read more: Corps, Marines unit proves high volume, large bead 3D concrete printing

EPA leaves sound regulations underpinning SPCC plans alone

Sources: Environmental Protection Agency; National Ready Mixed Concrete Association, Silver Spring, Md.; CP staff

After more than three years of soliciting expert advice and public comment on issuing a proposed rulemaking potentially expanding the petroleum product spill prevention, control and countermeasure (SPCC) terms typical of concrete plant environmental permits, EPA Administrator Andrew Wheeler signed a final action establishing no new regulatory requirements under the Clean Water Act (CWA). 

Read more: EPA leaves sound regulations underpinning SPCC plans alone