A significant portion of the guide addresses multi-story construction, where floors must support the weight of upper floors before they have reached full strength.
The American Concrete Institute’s committee 347 was established specifically to address formwork for concrete. The first version of this guide was published in 1958, and it has undergone several revisions to reflect advancements in materials, structural analysis, and safety regulations. aci 347r14 guide to formwork for concrete pdf
A contractor wants to pour a 20-foot-tall foundation wall at 8 feet per hour. The concrete temperature is 50°F. Using the outdated 2003 guide, the calculated pressure might be 1,200 psf. Using ACI 347R-14’s updated SCC and high-strength adjustments, the pressure calculates to 1,800 psf. Without the PDF, the contractor would under-design the ties and walers, leading to a blowout. A significant portion of the guide addresses multi-story