ACI PRC-560-22: Insulating Concrete Form Design and Construction—Report

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Description

Insulating concrete forms (ICFs) are leave-in-place forms typically produced in block or panel shapes of expanded polystyrene (EPS). They provide additional components, such as insulation and a substrate for interior and exterior finish attachment, for a wall or floor system. The most widely used ICFs are block shapes, which are stacked in an interlocking fashion to create stable formwork for creation of reinforced concrete walls. Due to the variability of these manufactured form systems, this report does not attempt to address every ICF type, but provides a commentary on those systems most prevalent in the market, and insight, as well as additional information, relative to their use in design and construction. The report focuses on ICFs for walls.

Keywords:

bracing system; crossties; expanded polystyrene; formwork configurations; formwork materials; insulating concrete forms; polypropylene; polyurethane; screen grid; wall design; wall systems; web.

 

Document Details

Author: ACI Committee 560

Publication Year: 2022

Pages: 53

ISBN: 9781641951807

Formats: Printed Document or Protected PDF/Web View

Table of Contents

CHAPTER 1—INTRODUCTION AND SCOPE, p. 2

1.1—Introduction, p. 2

1.2—Scope, p. 3

CHAPTER 2—DEFINITIONS, p. 3

CHAPTER 3—INSULATING CONCRETE FORM SYSTEMS, p. 3

3.1—Flat-wall, p. 3

3.2—Additional ICF systems, p. 3

CHAPTER 4—MATERIALS, p. 5

4.1—Concrete mixture, p. 5

4.2—Reinforcing materials overview, p. 6

CHAPTER 5—INSULATING CONCRETE FORMS, p. 6

5.1—Formwork material, p. 6

5.2—Formwork configurations, p. 6

5.3—Insulating concrete form components, p. 7

5.4—Material performance requirements, p. 8

5.5—Bracing and scaffolding, p. 9

5.6—Miscellaneous, p. 9

CHAPTER 6—DESIGN AND ACI 318 APPLICATION, p. 9

6.1—General, p. 9

6.2—Flat wall ICF systems: application of ACI 318, p. 10

6.3—Waffle grid ICF wall systems: application of ACI 318, p. 11

6.4—Screen grid and post-and-beam ICF wall systems: application of ACI 318, p. 12

6.5—Other design resources for ICF wall systems, p. 13

CHAPTER 7—CONSTRUCTION, p. 13

7.1—Planning the construction process, p. 13

7.2—Foundation/multiple level considerations, p. 14

7.3—Reinforcing steel placement considerations, p. 14

7.4—Work implementation, p. 14

CHAPTER 8—REFERENCES, p. 15

Authored documents, p. 16

Appendix A: Design Examples (inch-pound units), p. 17

A.1—Engineered design examples, p. 17

Appendix B: Design Examples (SI units), p. 32

B.1—Engineered design examples, p. 32

APPENDIX REFERENCES, p. 49

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