Aci 347r14 Guide To Formwork For Concrete Pdf -
As high-strength concrete (greater than 6,000 psi) becomes common, the guide clarifies how rapid setting times and high early strengths affect form removal schedules and reshoring sequences.
Perhaps the most practically vital chapter concerns and reshoring . Concrete must gain sufficient strength before forms are removed to support its own weight and construction loads. ACI 347R-14 provides guidance on estimating in-place concrete strength using maturity methods or field-cured cylinders, rather than relying solely on time (e.g., “7 days for slabs”). It also details the critical process of reshoring—placing temporary shores under newly stripped slabs to distribute loads from upper floors during multi-story construction. Improper reshoring is a common cause of progressive collapse, where one floor fails and cascades down through the levels below. aci 347r14 guide to formwork for concrete pdf
The guide specifies what information should be included in contract documents, ensuring that the engineer/architect provides enough detail to guide the contractor without overstepping into "means and methods". As high-strength concrete (greater than 6,000 psi) becomes
