Helping Fresno Families
Helping Fresno Families
Over the past decade, the city of Fresno, Calif. has experienced a significant population boom, becoming the fifth largest city in the state; and the Valley’s population is projected to increase nearly 18 percent over the next decade. With that spike in population comes a need for development projects to better serve the city’s residents. Recently, Fresno’s Community Regional Medical Center (CRMC) recognized the need for an expansion of its pediatric services for the Valley’s families and, in early 2016, broke ground on a brand new medical office building that will provide several pediatric out-patient services. Along with the six-story medical building, the healthcare facility is adding a seven-story parking structure. The project’s general contractor, San Francisco-based McCarthy Building Companies (McCarthy), selected Fowler, Calif.-based Allied Concrete Pumping (Allied) to place concrete for the two buildings using four of its 15 Putzmeister truck-mounted concrete boom pumps. McCarthy and Allied have worked together on several jobs in the past.
“Allied sets extremely high standards,” said Kevin McKay, project manager for McCarthy. “They are among the best in the industry, with a long, proven track record of being on time, providing excellent service, and having the most reliable equipment.”
Working on an existing healthcare campus means access to the site is limited and ground space is at a premium. During concrete placement, Allied has been utilizing the boom pumps’ One-Sided Support (OSS) outrigger systems in order to safely set up large equipment in a tight area.
“It’s important to find a balance between providing customers with the right size equipment for the job, while also enabling our operators to feel confident in short-rigged situations,” said Austin Lewis, Allied’s project coordinator. “The OSS system allows our boom pump operators to reduce the outrigger span on the non-working side of the unit, while still ensuring the highest level of safety.”
Using a series of sensors, OSS achieves set up in confined areas without full outrigger deployment. The sensors maintain a defined working envelope that prevents the operator from positioning the boom outside a safe operational range.
Allied has used four different sized boom pumps on the CRMC expansion—a 20Z-, 38Z-5-, 47Z-, and a 58Z-Meter—as the structure gets higher, boom pumps with larger reaches were used. The medical facility has an L-shaped design, so Allied has broken up each floor into two pours. To keep trucks in position on the constricted site, the crew is using a four-inch (102mm) hose system—ranging from 100 to 300 feet (30-91m) in length—to reach all corners of certain pours.
“This definitely isn’t our largest job, but it has been one of the more challenging,” said Lewis. “We’ve had to utilize several different pumps to meet the needs of the project, which is why, over the years, we’ve invested in a large range of models. There really is a different Putzmeister pump for almost any application.”
The project called for a 4,000 psi, lightweight mix, which can be challenging to pump, given that it can result in slump loss and increased pumping pressures. Pumping lightweight concrete through a hose can be even more difficult. To monitor the various temperatures and pressures throughout the course of the job, the pump operators used the pump’s Ergonic® Control System with remote control.
“The remote display panel allows our operators who are pumping on multi-story deck pours the ability to closely monitor the machine without having to be on ground level with it,” said Lewis. “The automated system and remote control takes out a lot of guess work and makes the entire process run more efficiently.”
In the past year, Allied has invested in five new Putzmeister truck-mounted concrete boom pumps. As the population in parts of northern California continues to expand, so does the number of construction projects. The company has recently begun servicing the Sacramento region with the addition of the new machines.
Within a decade, the number of children in the Valley under the age of 10 will reach nearly half a million—the largest age group in a region that suffers from a shortage of pediatricians and pediatric specialists. When the new CRMC expansion opens in 2018, Fresno will be one step closer to meeting the community’s healthcare needs.
Owner/Developer: Community Regional Medical Center—Fresno, Calif.
General Contractor: McCarthy Building Companies—San Francisco, Calif.
Ready-Mix Supplier: CEMEX U.S.—Houston, Texas
Equipment Owner: Allied Concrete Pumping—Fowler, Calif.
Equipment: One Putzmeister 20Z-Meter Truck-Mounted Concrete Boom Pump, one Putzmeister 36Z-5-Meter Truck-Mounted Concrete Boom Pump, one Putzmeister 47Z-Meter Truck-Mounted Concrete Boom Pump, and one Putzmeister 58Z-Meter Truck-Mounted Concrete Boom Pump