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Con/Steel Tilt-Up Systems Provides estimating assistance, training, quality control, and access to experienced structural and architectural design to general contractors performing tilt-up construction. http://www.consteel.com/
Gouda, Dr. George Worldwide cement industry consultant. http://www.cementspecialist.com/
Struweb Concrete Design Aids Offers downloadable PDF files explaining how to design reinforced concrete members in accordance with the ACI 318 building code requirements for structural concrete. http://www.struweb.com/