September 1997 Table of Contents

Features Using Glass-Fiber-Reinforced-Plastic Forms

Providing such benefits as easy handling, multiple reuses and smooth surface finishes, GFRP forms are a popular choice for architectural concrete. A combination of about one-third glass fibers and two-thirds polyester resin, GFRP forms are typically used to form columns, beams and slabs (typically waffle or one-way joist systems). Other GFRP products used in forming concrete are form ties and patterned form liners. Read more

Features Panel Systems and Hardware for Residential Wall Forming

Article profiles 11 residential-wall forming systems, ranging from high-density overlaid (HDO) plywood-panel systems to heavy-duty aluminum forms. Special hardware systems for use with plywood panels also are described. The descriptions include panel dimensions and materials, system applications, bracing requirements and hardware features. Information was provided by the form manufacturers. Read more

Features Expand Your Forming Options

When forming bulkheads, footings, foundation walls and other concrete elements having surfaces that will not be exposed to view, expanded metal stiffened by integrally formed ribs is an effective sheathing material. It remains in place, saving the labor of form stripping, and the rough surface bonds well to any concrete cast against it. Read more

Features Concrete Canoes Rock and Row in Cleveland

On the calm waters of Lake Erie, against the backdrop of the Rock and Roll Hall of Fame, 25 civil-engineering students across North America raced canoes they crafted out of lightweight concrete and special reinforcing materials. The goal: to win the 1997 ASCE/Master Builders National Concrete Canoe Competition and a $5,000 scholarship for the school's undergraduate civil-engineering program. Demonstrating perseverance, team spirit and concrete know-how, the Florida Institute of Technology earned the top prize, upsetting reigning champion University of Alabama Huntsville. FIT team members spent nearly 2,800 hours designing and building their concrete canoe, named Chip Off the Old Block. The vessel is 19 feet long, weighs 80 pounds and has walls only ¬ inch thick. Read more

Features Controlling Deflection of Composite Deck Slabs

Composite construction is the most common structural system for elevated floors. It consists of concrete placed on metal decking that's supported by structural steel beams and girders. As the concrete hardens, the steel framing and concrete bond together to carry dead and live loads. Until the concrete hardens, however, the framing and metal deck must carry construction loads that include the weight of the fresh concrete. This weight can result in floor deflection and levelness problems. Read more

Problem Clinic Magnets Hold Formwork Blockouts

In the May 1990, issue of Concrete Construction (page 464) you showed magnets being used to anchor blockouts to metal forms. Is this a new idea? And where can people get the magnets? Read more

Problem Clinic Will Grooving Weaken a Floor?

We're considering grooving a slippery concrete floor in our manufacturing plant to reduce the danger of accidents. However, I'm concerned about the effect of such grooving on the floor's structural strength and abrasion resistance. Is this a valid concern Read more

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