In the last issue of the PCI JOURNAL, I recounted how, with the experience gained on the Walnut Lane Bridge and at the Austin Company tests, I returned to Tacoma, Washington to set up Concrete Engineering Company with my brother Tom and father Eivind. Construction of our pilot plant and an outdoor pretensioning bed were quickly followed by development of a high-strength "no-slump" concrete, with compressive strengths up to 10,000 psi (69 MPa). After a slow start, which showed us the importance of effectively marketing our products, we reorganized into two companies: Concrete Technology Corporation, confined to production, testing, and developmental research, and Anderson and Anderson, now ABAM Engineers, Inc., operating as an independent consulting engineering firm. We developed several innovations which helped us produce a more economical or higher quality product. With these, and with some imaginative engineering, we produced a number of unique or interesting structures. The most outstanding of these, and the systems they used, are described here.
