To create sustainable value by providing industry-leading products and solutions to satisfy the construction needs of our customers around the world. Their engineer prepared a book of details where among other details, the grouting at the base of columns was detailed, see Figure 9. Besides, Coreslab specifically provided a note in their erection drawings that grout be placed within 48 hours of the erection of the column, see appendix A-14.
In fact, Solar Erector's own erection procedures required that "the grouting of the column bases shall be done in a timely manner (misspelled in the original document as manor) and as soon as possible, unless noted otherwise in the Erection Drawings".
The upper and lower segments of columns B2 and B3 fell to the ground near their bases but skewed in different directions, see Figure 18. The upper segment of column B4 above the fourth level fell to the ground, but the lower segment of column B4 and the remaining upper segment remained standing almost plumb, still attached to its footing.
The sixth and fifth floor IT beams between columns B5 and B4 did not fall to the ground but sloped and leaned, and rested on the east end of the fourth floor IT beam. Sometimes, the grout projecting beyond the column would be cut. The precast erector thereby failed to maintain structural stability during construction.
Double tees (two stems) spanned in the north-south direction supported by either inverted tee beams, known as IT beams, or by spandrel beams both running in the east west direction. The specialty engineer inadvertently indicated 6,000 psi as the concrete strength of a certain column instead of 7,500 psi.
The engineer will apply lean manufacturing techniques to reduce overall cost and increase production yields. The engineer will be responsible for providing production support to both single point diamond turning processes and optical fabrication processes. MEP STRUCTURAL Engineering & Inspections, Inc.
Discrepancy was noticed on the design strength of concrete between CEG's design calculations and fabrication drawings prepared by Coreslab. With nearly half a century of combined experience, our licensed land surveyors and engineers are always available to complete project within expected time and budget.
He failed to write inspection reports on the base grouts of eighteen columns. On October 10, 2012, an additional load of 165 kips was placed on column B3 because additional IT beams and double tees were placed on the fourth, fifth and sixth floors. When design strength of the concrete, f′c = 7,200 psi based on the result of the specimen testing was considered, the column design was found adequate.
Coreslab representatives were frequently present at the construction site providing solutions to issues faced by the precast erector and others during erection of the garage. Analyzes engineering sketches, specifications, and related data and drawings to determine design factors, such as size, shape, and arrangement of parts.
This triggered a cascade of collapse of columns, inverted tee beams and double tees on all five floors weighing approximately 3,300 tons over an area of approximately 16,000 square feet. Columns were manufactured one at a time and were not prestressed. Two double tees north of grid line B and two double tees south of grid line B between columns B4 and B5 were also displaced.
The engineer will assist with capital improvement projects to include new systems identification, acquisition, and integration into production lines. Two were professional engineers who visited the site only when called to examine permanent welds between the structural components, or to address specific engineering issues.
The product was built according to the Client's rigid engineering specifications, and tested in the Client's Virginia Testing Facility before being installed in their Miami manufacturing facility. Since the company's inception in 2005, Continental Glass Systems flourished and quickly became a respected and trusted name among the major South Florida developers and construction companies.