plication. SKYTABLE is a large format table featuring a three-point pick method, best for large slab areas and designed for each project’s building geometry. Product delays throughout the project – including delays in the de- livery of steel support beams – required last-minute adjustments to the shoring support to ensure each tower could hold the load for an extended period of time. PERI USA engineers worked on site with the concrete crew to change solutions on the fly and ensure the proj - ect could safely continue. In addition, the building footprint changed on each level, requiring changes to the formwork and slab systems for each new floor of the building. Each deck was designed as a complex grid with a high-level finish, leading to the decision to utilize the rentable, customized, and adjustable SKYTABLE forms for beams and slabs. The formwork systems also enabled the use of self-consolidating, colored concrete, a slower-drying concrete. This added time to the construction process and further required an easy-to-use and quick formwork and slab solution to speed up the process. Aggressive Demands PERI’s team faced an aggressive timeline and had to meet demands on multiple fronts with the construction of the Centene HQ building.
A typical project of this nature would require a month’s time to prepare after being awarded the work. Based on an aggressive construction timeline, the team had only two days to complete its prep work before the start of construction. A team of eight engineers from PERI USA designed the unique form- work and shoring solutions for the Centene Corporation Headquar- ters. The development of the solutions required a combined 3,000 work hours. In total, PERI USA shipped 250 orders from its facility to the project site, representing nearly $11 million of material in two months. More than half of the orders were shipped out on the same day the order was placed to keep construction moving forward without any delays, all of it occurring during PERI’s inventory season. Every truck to the site included a full system that could be erected immediately upon delivery due to limited holding space. On top of the shoring and formwork system deliveries, PERI coordi- nated the delivery of 18 full and seven partial truckloads of plywood – 6.25 football fields worth – to be used with shoring. With the cost of a single day of delay being $40,000 and to accommo- date the high volume of deliveries daily, Lithko increased the concrete crew to 150 people on site working on a two-shift schedule to keep construction moving for 22 hours each day. Phase One: Complete Construction on the Centene campus will occur in multiple phases over several years. Despite the fast timeline and turnaround time, concrete construction was completed a week ahead of schedule thanks to the collaboration of Lithko and PERI USA and the efficiency of the sys - tems used. PERI’s involvement on phase one began in November 2020 and was completed in June 2021. Phase two is expected to begin in 2024.
Architect: LS3P General Contractor: Clayco Customer: Lithko Contracting Location: Charlotte, NC Products: • PD5 Shoring System • HD 200 Heavy-Duty Prop • VARIOKIT VST Heavy-Duty Tower • SKYTABLE Slab Table • Uniportal • MULTIFLEX Girder Slab Formwork • TRIO Panel Formwork • Plywood
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DECEMBER 2021 csengineermag.com
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