Foundations & Walls: Page 53

Reap the Benefits of Membership at the CFA Summer Meeting

Membership in the Concrete Foundations Association offers valuable resources and support to help you run your business.

Sponsored Content

Is your concrete winter-ready?

Crafco Inc.

Winter is the toughest season for concrete. See how a safer new class of concrete protectant blocks salt and ice damage.

Is your concrete winter-ready?

Demolishing Minnesota's Metrodome

Using a Volvo high reach excavator, a Minneapolis-based contractor brought down the 900,000 sq.-ft. structure, recycling 80% of the materials and debris

A Volvo EC480D high reach excavatorwas used for reaching up and pulling all chairs and debris down to the field level. Once the project was completed, the boom was removed and the machine was fitted with a conventional stick for processing and load out work.

Concrete Equipment & Products

70-foot-long Concrete Bridge Survives Series of Simulated Earthquakes

University of Nevada, Reno’s new Earthquake Engineering Lab hosts multiple shake-table experiments

University Of Nevada Earthquake Simulation Hrel Large

New Bridge Design Helps Speed Construction, Resist Earthquake Damage

Researchers developed a new bridge design for the framework of support columns and beams that can improve earthquake resistance and faster on-site construction

This graphic illustrates a new design for the framework of columns and beams that support bridges to improve resistance to earthquakes and faster on-site construction. The faster construction is achieved by prefabricating the columns and beams off site and later erecting and connecting them quickly at the construction site.

ACI Foundation and Councils Announce Leadership Changes

American Concrete Institute (ACI)

The new ACI Foundation Chair is Debrethann R. Orsak.

Warehouse Uses Freestanding Tilt-up Concrete Panels in Non-traditional Ways

Large wing wall concrete panel extensions at the building steps are finished to resemble cast-in-place concrete

Elements of the Metropolitan Van & Storage building create a visual dialogue of parts which effectively dispels the mass of the overall building, ensuring that the building achieves a facade that is geometrically modern, sculptural in composition and sympathetic to the human scale.

Visible Pour Lines – Are They A Problem?

What to do when customers worry the pour line is a crack in their new concrete.

Cfa Q A Jj 2 11465461

NRMCA Seeks Proposals for 2015 Concrete Sustainability Conference

National Ready Mixed Concrete Association (NRMCA)

Contractor Uses Tilt-up Concrete to Convert Reinforced Masonry Church to a Concrete Structure

Houlihan Construction converted Saint Mary Coptic Orthodox Church using 95 tilt-up concrete panels plus a full concrete dome

Saint Mary Coptic Orthodox Church presents an old world theme using the adaptability and strength of tilt-up construction.

Concrete Equipment & Products

Prinsco PROFORM Pipe System

Prinsco Proform Photo Cmyk 11508038

CFA - "Moving Toward Profitability"

Formwork Mortar Leakage

American Society of Concrete Contractors (ASCC)

A concrete contractor recently had a close-out meeting with the Owner and Construction Manager, and was be surprised by the demand for a reduction in payment based on form leakage.

Figure 1 Fins and offsets can be the result of form leakage. But fins and offsets have tolerances as described in ACI 117 and ACI 301. Fins and offsets are allowed but the height of each is controlled by the tolerances. If form leakage were prevented, there should be no tolerances. The fact that the tolerances are included in both ACI 117 and ACI 347 means that form leakage is acceptable but is limited by these ACI documents.

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