Perfect Block ICCF forms have been engineered and built to 48 plus feet tall (free standing/load bearing). It is important to note that in most applications, Perfect Block ICCF projects using ACI 318, like any steel reinforced concrete wall, can be designed.   With Perfect Block ICCF, structures of up to two stories can be built following the IRC Section R611 or the Prescriptive Method for Insulating Concrete Forms in Residential Construction ( EB118 ).