Prescriptive Method


prescriptiveStructural engineers often overcomplicate ICF construction because they treat the technology as if it were a complex building system. In reality, ICF formwork is not a system or a structural component. It stays in place permanently as part of a cast-in-place concrete wall.

The U.S. Department of Housing and Urban Development has published the “Prescriptive Method for Insulating Concrete Forms in Residential Construction.” The stated purpose of the document, published in May 1998 was to “fulfill the need for prescriptive requirements and to improve the overall affordability of homes constructed with insulating concrete forms.” In 1999, SBCCI incorporated the prescriptive design into the Standard Building Code. In 2000, the prescriptive method was incorporated into the International Residential Code. In 2007, PCA completed a review and expansion of EB118 to serve the needs of high seismic regions of the U.S in the publication PCA 100-2007 Prescriptive Design of Exterior Concrete Walls. The provisions of this document were then added to the IRC. A residential project of up to two stories may be designed in accordance with the International Residential Code Section 611 or the Prescriptive Method EB118.

∗ The Construction Specifier - Andy Lennox

Prescriptive Method